E-wallet mobile application- optimization and improvement

I have an e-wallet application with 4 tabs: Main, Reports, Loyalty cards, Settings. What has been done is write below: "I desire an android aplication with the following elements : 4 tabs for the main menu (Cash , Cards, Reports, Settings) . In Cash - 2 buttons Save and Add photo ,Cash in , Cash out - 2 radio buttons , Amount and space to write the amount and a spinner for the amount (eur,$) ,Comments ,Category (Food, Fuel, Electronics ,..) also into a spinner ,Date and time ,Location given by google maps , and synchronized the data base with google play .When the button Save is pressed to save the data into the database , and Add photo to save the link to the photo of the bill. In Cards - To save the photos of the comercial cards or promotion card by saving the face and the back of the card and writing the name of the company and the option to write the code of the card and displayed like a pictogram , when clicked to open fullscreen . In Reports - you can select the date between two intervals and the category and display how much money have you spent on food, fuel ,electronics , or the date and the category stays to all tipes. In Settings - the user can add extra elements in category , amount tip . So thats the app! " The application is done and functional, but i need an upgrade for it and optimization for the last 3 tabs. First tab is very well optimized.