I am currently valiantly battling with a multitude of issues with my .NET Core API, and I require the help of a seasoned professional. In need of someone who is proficient at: - Troubleshooting and fixing authentication errors: I am routinely encountering authentication issues which is deeply affecting usability. - Enhancing data consistency: I have been observing a distressing amount of data inconsistencies that need rectifying. - Implementing user registration and authentication: I need to provide my users with a smooth registration and login process to enhance platform accessibility. - Building data validation and error handling mechanisms: My API is in dire need of solid data validation and error handling procedures to increase reliability. - Integrating with external systems: ...
I'm seeking a highly skilled fullstack developer who is proficient in PHP, .NET, and especially SQL for diverse web application projects. Your primary role will be equal focus on both front-end and back-end development on multiple platforms, including WordPress and PHP. Mandated Features: * Database Integration - Structuring, optimizing, and ensuring smooth functioning of databases within applications. * API Integration - Implementing third-party APIs comprehensively. Ideal Skills and Experience: * Proficient in PHP, .NET, and SQL. * Strong experience with WordPress. * Proven full-stack capabilities. * Expertise in Database and API integration. * Good problem-solving abilities and attention to detail. We're expecting high quality work with minimal supervision....
I'm seeking a talented web developer to create a simple and intuitive WordPress website for IT cybersecurity service - similar to this: Website needs to include: - contact form with captcha - integrated links to payment portal (will provide) - newsletter integration (WP plugin) - upload to hostgator word press site (will provide access to instance) I will provide content. Page needs to be simple to navigate but professional looking. Please provide with your bid the design you propose. Your bid price will include all of the above including template purchase (if needed).
I have a very simple logo that I would like to be exported as SVG. Logo consists of couple simple lines and it is very minimalistic.
...profit target and then trade 1 lot on LTCUSD to pass minimum days, this is not okay as LTC has a contract size of 1 while EURUSD has a contract size of 100,000. In this example, a 100 pip increase in LTCUSD would be equivalent to $10 but a 100 pip increase in EURUSD would be equivalent to $1,000. – Example 4: If you have 5 trades of EURUSD opened at the same time, each with a lot size of 1, your net position size is 5 Lots. Thus, if your smallest lot size is 0.5 lots, this is not okay. Taking advantage of the demo environment is also not permitted. Traders cannot trade digital currencies over the weekend to pass the minimum days." I traded 16 days to pass the challenge, and on 9 of those days at least I respected the rule. I am seeking legal assistance to...
I need simple static website created for a book around artificial intelligence and cyber security. This is a fixed price project and will need to include any templates you will use (no extra costs or payments after award of project). Please create a mockup on how that website will look like. Requirements: - professional looking - quality design and appearance - Attention to detail (you have to do your own QA review for spelling sign, functionality etc) - hosted on Hostgator WP - rendering to mobile devices properly - websites need to be created in 4 days from project award. Book Website 1: the following menu/pages: - index page - About the author - The books with purchase links - Speaking - Contact form (with Captcha) - Connected to newsletter (WP plugin) ...
I'm in need of a skilled photo editor who can help me alter the date on a photo. The task is fairly straightforward as the photo has a simple and plain background where the date is located. Key Requirements: - Change the date on the photo: I need this to be done accurately and without affecting the quality of the image. The new date will be provided to you. - Final file format: The altered photo should be delivered to me in a JPEG format. Ideal Skills: - Proficiency in Photo Editing Software: You should have a good understanding and experience in using photo editing software. - Attention to Detail: Precision is key in this task to ensure the date alteration is done accurately.
I need a skilled network specialist to set up a single VPN tunnel between two routers using OpenVPN. The routers are both GL Net routers: the flint GL-AX1088 router and the GL - A1300-370 router. The main router on my server is the Lynksys Mesh router on a Gigaclear service provider. The main purpose of this VPN tunnel is to ensure secure data transfer between the two routers. in different countries. Key details: - The routers are using the DD-WRT operating system. Experience with this system is highly desirable. - Beyond the VPN tunnel, no additional security features need to be configured. Ideal skills for this job include: - Proficiency with OpenVPN and setting up secure VPN tunnels. - Experience in configuring routers, especially those running DD-WRT operating system. - ...
I am looking for a skilled developer who has experience with Solana to create a basic token. This project will involve building a token with the following characteristics: - A buy and sell tax of 5%: The token should automatically tax 5% on buys and sells. - Fixed supply: The token should have a fixed supply. This means that once the tokens are created, the total token supply will not change. The ideal candidate for this project should have: - Proficiency in Solana development - Experience in creating tokens with unique tax structures - Understanding of the difference between fixed and variable token supplies. If you have the experience with Solana and token creation, and can deliver a quality product within a reasonable timeframe, I would love to hear from you.
...focus on measuring investment performance, assessing risk and return, as well as tracking portfolio growth. Key Requirements: - Develop metrics for Return on Investment (ROI), Internal Rate of Return (IRR), Cash Multiple, and Net Asset Value (NAV). - Multiple on Invested Capital (MOIC Metric) - Gross Total Value to Paid in Capital (Gross TVPI Metric) - Net Total Value to Paid in Capital (net TVPI Metric) - Residula Value Per Paid In Capital (RVPI Metric) - Distributions per Paid In Capital (DPI Metric) - Gross IRR Metric - Gross Realized IRR Metric - Net IRR Metric - Net Realized IRR Metric - Revenue - Lifetime Value of a Customer (LTV) - Unit Economics - These metrics should be calculated on a quarterly basis. Ideal Candidate: - Experience in financ...
I'm in need of a freelancer to design a simple, user-friendly blog website targeted at the general public. The primary function of this website should be for blogging. Key Features: - User Sign Up: The website should include a straightforward sign up process for new users to create an account. Ideal Skills: - Web Development: You should have experience in designing simple yet effective blog websites. - User Interface Design: The website needs to be user-friendly. Understanding of UX/UI design will be advantageous. With these specifications, I'm optimistic we can create a platform that successfully engages the general public with my blog content. If you believe you have the skills and experience to deliver this project, I would love...
chrome browser extension that that would combine these two pages into a single page to allow a user to easily work between the two: I would assume we could use an iframe. I tried to do this today but ran into permission issues and don't have the experience to fix it. The user should be able to see both at the same time and copy data between them easily. Can you complete this today and send it to me? Once this basic site is complete then we will add to it.
I am looking for a talented and experienced social media manager to create and manage the social media profiles for our professional cycling team. Key Responsibilities: - Establishing and maintaining active and engaging profiles on Facebook, Instagram, Twitter, TikTok, and Snapchat. - Creating and sharing engaging content across the platform...and Snapchat. - Excellent written and verbal communication skills. - Ability to create engaging and shareable content. - Familiarity with the cycling industry and its audience. Your main objective would be to cultivate a strong online presence for our team, engaging with our target audience which includes cycling enthusiasts, sports fans, the general public, government leaders, celebrities, high net-worth individuals, and international medi...
I have a very straightforward proof-of-concept website that I'm looking to enhance through a layout and user interface redesign. While the current version of the site is functional, it lacks visual appeal and feels rough around the edges. Key Features Required: - Improved Layout: The website's current layout is basic and needs to be revamped to give users a more engaging and intuitive experience. It especially has to work with mobile devices. - UI Design Overhaul: The user interface design should be made more user-friendly and aesthetically pleasing. Preferred Design Style: As I'm looking for a minimalist and clean design, I want the new layout and user interface to be simple yet effective. The goal is to make the website look polished and professio...
A very simple web and mobile site with 3 main features. (MVP) Problem: I am always texting or emailing myself notes to remember throughout the day, articles to save, youtube videos to rewatch, information I get on a phone call, etc. I asked my instagram followers who else does this and realized a lot of people do. I threw together a landing page and started a waitlist + started taking preorders for a huge discount and already have collected money. I need an MVP that users can do 3 main things: *First Feature* - make an account - be provided with the twilio number I bought - be provided with an email address - Save the above phone number and email in their phone as contact "NoteHero" - text or email their note hero to have their notes go straight to their digital noteb...
I'm seeking an expert in .NET framework for a project that involves setting up a multi-tenant database. My preference is to have a separate database for each tenant, with the databases themselves being simple and containing only a few tables. Key Responsibilities: - Develop a multi-tenant functionality in .NET entity framework - Implement a separate database for each tenant - Design a simple database with few tables Ideal Skills & Experience: - Extensive experience in .NET Framework - Proven expertise in multi-tenant database setup - Proficiency in designing simple databases
Please read completely before placing a bid ! Please bid only if you also plan to respond... Please someone who is interested in doing several projects Please make realistic offers and no fake offers where the price multiplies afterwards. Please keep in mind that changes can still be made during the testing phase ! NO Game ! NO Mobile Game ! NO Graphics ! NO Website ! Thank you! Knowledge of LUA & XML is required!! Hello, I'm looking for someone who can program an addon for the video game "World of Warcraft". It is not a game, but an interface modification. Similar to MODs in Minecraft or Skyrim. LUA & XML knowledge is needed. This addon is to allow the bags to move freely in the game. There are already suitable addon but they are outdated and therefore
We have a package delivery company with a website built in .php where our users can book pickup and delivery of packages. Now we want to build an extra function where the user can see where the package is. For this reason we need a very very simple application for our driver to just start up for tracking, no other functions needed for now. And the data will be sent to our database for our website where we show everything on a map.
I am seeking an experienced .Net developer who can proficiently build a web app with full focus on API endpoints creation. The web app should specifically support the creation of GET, POST, and PUT requests. Key Features: - Creation of API Endpoints - Support for GET, POST, and PUT requests. Ideal Skills: .NET Framework Web API Development REST API Integration Experience in database integration and user authentication would be a bonus, but the main requirement is expertise in .Net development and a solid understanding of the API lifecycle. The developer should be able to leverage modern .Net technologies and best practices to ensure efficient, secure, and scalable API integration.
As an experienced developer, my goal is to connect my existing trading BOT, already linked to Bitstamp, to Kraken API. The chosen candidate should be proficient in .NET, particularly .NET Core. Key Responsibilities: - Connect my BOT to the Kraken API using .NET Core - Implement functionalities for trade execution, market data analysis, and account management Ideal Skills: - Proficient in .NET, particularly .NET Core - Previous experience with API integration, preferably in the trading sector - Strong understanding of trade execution, market data analysis, and account management - Ability to troubleshoot and optimize the integration process for a seamless user experience. If you have the necessary skills and are confident in your ability to deliver th...
I'm in need of a unique plastic rectangular frame with a net for a beach game. The net will be used for a game similar to spikeball that will be played on the beach. It is similar to a a game called beer dye commonly played at colleges so I need to have 4 holes in each corner that can hold a ball similar to how poole is played where the balls fall in a hole Key requirements: - The frame should be durable, water-resistant and suitable for the beach environment. - The net should be of high quality and appropriate for game play. - The overall design should be innovative and engaging. The ideal freelancer for this project would have experience in: - Industrial design with an emphasis on sports equipment or outdoor products. - Fabrication of plastic product...
I'm looking for a skilled developer to optimize my .NET and Angular project. The main areas I need improvement in include: - Performance: The project currently suffers from slow loading times. I'm looking for a professional who can optimize the code to ensure faster loading speeds. - Code Structure: The backend code in particular requires attention. I want to restructure it for better readability and maintainability. - Routing and API Optimizations: I need someone to optimize routing and API calls to decrease loading times and improve overall project performance. -Lazy Loading, Eager Loading optimizations Ideal candidates will have: - Proficiency in .NET and Angular - Experience with optimizing projects for performance, especially in addressing slow loading times -...
...Required: Availability from 9a-5p EST on 5/13 and 5/14, ability to make ~500 domestic calls from US cell phone/number. Key Responsibilities: - Conduct a series of cold calls to to pool service companies to collect data on their business statistics (size, etc.) and software usage (offering $USD incentive for participation) - Collect feedback on which specific Swimming Pool software they use, Net Promoter Score (NPS), Likelihood to Switch to a different software platform, etc. - Document the feedback accurately in Google Sheets - Schedule interviews via Calendly (offering $USD incentive for participation) Ideal Skills and Experience: - Background in US telemarketing - Previous experience in conducting cold feedback phone calls - Strong communication skills - Attentio...
...experienced .NET developer to help me build a cloud-based web application. I haven't settled on a specific type of database yet, so I'm looking for your expertise to guide me in selecting the most suitable option. The application should be developed using .NET Core and should include a Web API. Key Requirements: - Database Selection: I'm currently undecided about the type of database to use for the application. Your input in selecting an appropriate database will be much appreciated. - User Authentication: I would like the application to have user authentication capabilities, preferably integrated with popular social media platforms. - User Management: The web application should have user management functionalities. The ideal candidate for this project sho...
...Sheets. Required: Availability from 9a-5p EST on 5/13 and 5/14, ability to make ~500 domestic calls from US cell phone/number. Key Responsibilities: - Conduct a series of cold calls to to pool service companies to collect data on their business statistics (size, etc.) and software usage (offering $USD incentive for participation) - Collect feedback on which specific Swimming Pool software they use, Net Promoter Score (NPS), Likelihood to Switch to a different software platform, etc. - Document the feedback accurately in Google Sheets - Schedule interviews via Calendly (offering $USD incentive for participation) Ideal Skills and Experience: - Background in US telemarketing - Previous experience in conducting cold feedback phone calls - Strong communication skills - Attention t...
I am looking for an experienced developer to help me create a minimalistic PHP web app that can perform a few key actions - user registration, send email notifications and generate reports. Key Requirements: - User Registration: The app should have a simple user registration system. - Email Notifications: It should also be able to send email notifications to users. - Report Generation: The app needs to have the capability to generate reports. I'd like to gauge the freelancers' skills and competence based on their past work, so please include examples of your previous projects in your application. Ideal Skills and Experience: - Strong PHP development skills - Experience in creating user registration systems and handling email notifications - Familiarity with report gener...
I need a straightforward MT4 EA with the following features: Strategy: The EA should open both buy and sell orders whenever a new candle forms. Take Profit (TP): Set TP to 50 pips for both buy and sell orders. Stop Loss (SL): Automatically close any open order when a new candle forms. Special Condition: If TP is reached for both buy and sell orders, the EA should wait for the next candle to form before opening new orders. Initial Lot Size: Start with a lot size of 0.01. Martingale: Enable Martingale strategy. Martingale Multiplier: Set the multiplier value to 2. That's all!
Please implement a one page website that is essentially a text editor similar to HemingwayApp dot com. For the full specs, please see the attached PDF file.
...seeking a skilled Selenium tester who can help me ensure the quality of my applications before deployment, which re written in both JavaScript and .NET. This is a niche project where you'll be integrating the test suite into Jenkins for a continuous integration pipeline. Key Responsibilities: - Create robust Selenium tests for my applications, utilizing both JavaScript and .NET - Integrate the Selenium testing suite into Jenkins for continuous integration - Run tests efficiently and effectively in the pipeline - Identify and rectify bugs in the code before deployment Ideal Candidate: - Proficient in Selenium and JavaScript, as well as .NET and Maven - Prior experience integrating Selenium tests with Jenkins for continuous integration - Adept at ide...
I have two projects one that uses lidar sensor functionality and the other project is made for an autonomous car model, i want to integrate both Projects together to enable lidar sensor feature in my car model. to make car model have lidar sensor with another existed sensor.
I'm seeking a talented designer to create a Modern, Simple, and Catchy style pouch for a food product. It should exude a comforting, homemade aesthetic. Please note the use of a specific color palette which will be provided. Ideal skills and experience: - Expertise in package design, specifically pouches - Experience with food products - Computer Rendering Skills. - Understanding of rustic and traditional design themes - Ability to work with specified color palettes.
I'm in need of a talented and reliable developer who can implement a machine learning model in .NET Core for a simple time series prediction task. Key Requirements: - You'll need to utilize machine learning techniques to create a model capable of predicting daily /hourly visitors as we have data for each enterance. - The model must be suitable for .NET Core and efficiently integrated into the existing system. Ideal Skills and Experience: - Proficient in .NET Core - Strong understanding of machine learning algorithms, particularly those suited for time series prediction. Please note that the specific machine learning algorithm to be used was not specified, so you'll need to have a versatile understanding of various algorithms. Your ability t...
Hi. I need help to setup the binding for a RichTextBox .NET Control so that data is retained. There may be use of VBA that is needed. This is within a FactoryTalk View SE version 14 application. I don't know .NET or VBA, I am a FactoryTalk guy though. Example use case: Lets say a factory has 100 valves. If a user opens popup for Valve #3, I need a text box field in that popup for the user to enter data, and then data is preserved/saved. That popup should be one common FTV display that references the Valve_# that was selected (using parameter files, or...). This example is the main objective. I need a simple and easy solution to this, and I need to understand how to do it myself afterwards. This is perhaps a 1 hour job. My name is Marc. I'm rea...
Simple website with a responsive design for mobile and PC. I have templates for both versions; each contains only a few images and a brief text, although the designs are quite different from each other. The development must be carried out using exclusively pure HTML and CSS code, without employing WordPress or others.
I'm seeking an experienced C# developer to port a python webapp app to a C# web app (most likely ASP .NET with RazorPages). There is no database, all the data comes from an existing API. Key Skills & Experience Required: - understanding the fastapi + jinja templates (python based) - Hands-on experience in developing RESTful APIs using C# - simple and clean code - data serialisation The entire app has 100 lines of code + ca 100 lines of HTML template There are 3 buttons and about 6 endpoints Task: GIVEN: A simple webapp in python (fastapi + jinja) RESULT: - A webapp with the same functionality based on C# - it should be easy to understand / clean code - data serialisation as in the python app / template - short documentation (dependencies/install/depl...
I'm looking for a skilled developer to change and develop an existing Hebrew language learning website, based on C sharp. Dot net. MVC. - The website is primarily focus on teaching the Hebrew language . - It should have interactive language exercises and grammar lessons. Ideal Skills: - Proficient in web development on C sharp. Dot net. MVC..
MUST READ FIRST =============== MUST HAVE - Blazor experience of at least 3 years - Latest version of .NET & SQL Server - At least 1 hour of availability between 6:00PM and 11:00PM EST - Your price is the one that you REALLY want to have with 10% +- NOTE - APIs will be provided (you will not develop APIs) - No development will be done on My Computer. - DO NOT APPLY if your fees can exceed 10% or your bid PROJECT I have C# Blazor Web App that works using SQL Server Database & using APIs at the same time. For the functions that use the database, I want to replace them with the APIs 1- Make code debuggable. 2- Error message appear with no details, need to make the error message has Show More to display the details of the error. 3- Load Codes from APIs instead of loadin...
...someone experienced in installing SSL certificates on Azure hosting. We run two .NET based sites on a single Azure instance - they are: We have control of the domain, but need to work with our client for control of the subdomain. We will purchase a multi-domain Comodo SSL certificate from NameCheap (potentially a new PositiveSSL Multi-Domain certificate again) and have you activate it and install it on the Azure service. The current SSL is due to expire on the 28th May 2024. Key Requirements: - Install the SSL certificate on an Azure instance hosting my two .NET sites. - Ensure that both sites are configured to run with HTTPS. The ideal
I'm looking for a basic React web page with side slide panels. This project is a proof of concept, so the side panels should be empty – they don't need to have any internal functionality other than opening and closing. The main goal is to create a clean, light-colored design that's responsive on both mobile and desktop devices. Key Requirements: - Simple, clean React web page - Two empty side slide panels - Light-colored design - Fully responsive on mobile and desktop Ideal Skills: - Proficiency in React - Experience in UI/UX design - Understanding of responsive design principles
I'm looking for a developer experienced in .NET Core and Umbraco to make modifications to an existing Umbraco project. The main focus will be on changing the CSS and the Free Trial form, which needs to be integrated with a CRM system. Key Requirements: - Proficiency in .NET Core and Umbraco - Skilled in CSS customization - Experience with CRM integrations - Understanding of user authentication in Umbraco The main tasks include: - CSS changes to improve the overall look and feel of the site - Customizing the Free Trial form, particularly: • Layout and design adjustments • Integration with a CRM system for effective lead management Your expertise in Umbraco components, particularly in navigation menus, contact forms, and image carousels, will be beneficial...
...around Exotic and Collector Cars. I need a comprehensive market research and Total Addressable Market (TAM/SAM/SOM) analysis specifically focusing on the exotic automotive lending industry. Key Points: - Industry Focus: Exotic Automotive Lending - Information Required: - Market size and growth potential - Competitor analysis - Customer demographics and preferences Target Audience: - High net worth individuals - Car enthusiasts - Exotic car dealerships Ideal Freelancer: - Proven experience in market research and TAM analysis - Specific experience within the automotive or lending industry would be a plus - Ability to synthesize data and provide actionable insights - Understanding of the dynamics and trends in the exotic automotive market - Strong analytical skills and the...
I'm releasing a book (a gay romantic fiction) in the summer under a pseudonym, and I want to have somebody take photos of the book with parts of their body in the frame in a way which will be very shareable on Instagram / Tiktok / Twitter etc. The photos would not feature your face. Example photos might be: - The book on your bed, while your legs are either side. - The book in your hands while you sit cross legged on the sofa. - The book resting on your torso is the sort of thing I have in mind. Requirements - Young (18+) white male - UK-based (so I can easily post my book to you) - Preferably has an e-reader (to include my ebook in the shot) but not essential - Physically attractive arms / legs / torso (no faces necessary)
I am seeking a skilled .NET developer to create a Windows application with the following features: - User Authentication and Authorization: The application should ensure secure user access and have roles-based permissions. - Database Integration and Management: Experience with handling complex data and ensuring its security is essential. - API Integration: The application needs to communicate with external systems through APIs. My primary concern is scalability. The application must be designed to grow and handle an increasing number of users without compromising performance. Hence, I am looking for a developer who can plan and implement a scalable architecture from the very beginning. The ideal candidate should have: - Proficiency in .NET framework, particularly for Windo...
we have issues with getting dropzone to work on our website that is built with .php. So we just need someone to fix so we can upload files on one page and the files are getting sent to the server.
I am in need of an experienced illustrator with a sharp eye for architectural style and medium-level detail. Your task will be to convert about 100 of my basic 2D and 3D architectural line art illustrations into 3D line art illustrations. The output can be in colourful or black and white, but they should be visually appealing and clean. Ideal Skills: - Proficiency in creating architectural style illustrations - Experienced in creating detailed illustrations - Ability to transform 2D designs into 3D line art The architectural style should be modern, keeping the design minimalist with an emphasis on detaild, cleanliness and appeal. Your creativity will be greatly appreciated in this project, and I look forward to seeing your innovative approaches to this task.
I am in need of an experienced illustrator with a sharp eye for architectural style and medium-level detail. Your task will be to convert about 100 of my basic 2D and 3D architectural line art illustrations into 3D line art illustrations. The output can be in colourful or black and white, but they should be visually appealing and clean. Ideal Skills: - Proficiency in creating architectural style illustrations - Experienced in creating detailed illustrations - Ability to transform 2D designs into 3D line art - Architectural or civil engineering background is needed. The architectural style should be modern, keeping the design minimalist with an emphasis on details, cleanliness and appeal. Your creativity will be greatly appreciated in this project, and I look forward to seeing your innov...
...optimize our site's content for target keywords related to offshore financial services. - Perform site audits to ensure the website is optimized for search engines. Ideal Candidate Profile: - Prior experience in SEO for financial services, particularly in the offshore industry, is highly desirable. - Proficient in conducting keyword research and analysis. - Proven track record of increasing organic traffic and improving search engine rankings. - Familiarity with SEO tools like SEMrush, Moz, or Ahrefs. - Strong analytical skills to monitor and report on the performance of SEO strategies. Target Audience: - Businesses interested in offshore financial solutions - High net worth individuals seeking wealth management services - Individuals looking for offshore banking an...
I require an experienced developer to upgrade my ComicBase Mobile app, currently running on Xamarin, to .Net Maui. The app is utilized on both iOS and Android platforms. Key tasks include: • Deliver full conversion from Xamarin to the latest .Net Maui framework • Replace the current ZXing barcode library • Determine and implement a suitable alternative barcode library like , or others that meet my project specifications (refer to the attached requirements) - Add lesser fixes and update requirements (see attached) • Ensure compatibility across both iOS and Android platforms The ideal candidate should have: • Extensive experience in Xamarin and .Net Maui • Deep understanding of barcode libraries • Proven track record ...
I need a simplistic, one-page website linked to a database. This page will have limited content, including a logo and a 'check authenticity' button. The database will be provided in an Excel sheet format, and must be integrated seamlessly into the page. Key Requirements: - Develop a one-page website - Integrate an Excel database for product authentication - Provide a clean, simplistic design Ideal Skills and Experience: - Experience in web development, particularly one-page websites - Proficiency in database integration, specifically Excel - Ability to create clean and minimalist designs - Strong understanding of web security and authentication processes
Need someone to help in simple bug fixing error who has experience in android apps and knowledge about it Requirements are Coding skill Android knowledge
