Ios & Android App

Are you a mobile App coder and designer? Maybe a "Flutter" professional? I need help with my own app. I already programmed an useful documentation app in RFO-Basic that I already use for my daily work and I want to have that in flutter code or somethings else. There is one thing I can't do in my app, that will be your turn so solve. The target is to have a full functional app that I can publish on an Android- and Apple store. Of course I also want the script with the flutter code in the end. To be successful in an Appstore, my app needs a good design, too. But maybe there are also good templates for it?

How I imagine our cooperation: you don't need to talk with me much about the functionality of the app, I don't need advice, that saves time. I'll send you my app as an apk file and you will build that in Flutter code. I can explain, how my code does the work, if you need help to understand. It would be great if you could enrich my app with one or the other idea. The design must be convincing, so that must also be one of your strengths.

So what do you say? What's your price?