Updating final mobile app...

I need to hire professional developer in mobile app development. I have Budgeting app using ionic framework. Need to update some functions and add some features. you have to submit me creative idea to update this app. if you have good experience in this field, Let's start from app updating! current app: [login to view URL] you have to register this app first. and then you can check income, expense, explorer data, invite friend, referral code entering... if you found issue in app, I will hire you and you have to update issue. and then you can work in maintanance of this app. Thank you, Denys