Build simple custom app based on provided well-documented SDK for data collection

I need to build a custom app for a motion sensor that was purchased to collect data using code and well documentation that already exists. The manufacture provides a well-documented SDK with example code on how to build custom apps using their libraries and example source code for apps already made to collect data from the sensors. The original app allows you to log sensor data (store on it on the device) or stream it (store it on the app) and download it where needed as a .csv file. I need the exact same thing except I want it to also add labels to the data (basically making it output one more column with labels for each real time data point) which can change in real time if activated on the app to denote the labeling of some unique activity that will later on be used as data to train a neural net. Use case: Turn on data collection device in the morning and carry out the day, as data is logged by default every point is labeled as "non-active" then when im about to begin the specific activity in the day, i just press a button on the app that now labels any data after recorded as "active" until i press the button again and disable it and it goes back to labeling the collected data to "non-active" until activated again. Once data is done for the day, it is saved as a CSV and uploaded to a google drive. App has a super super simple interface. Tutorial : [login to view URL] Documentation: [login to view URL] Source Code: [login to view URL] API Reference: [login to view URL]