How to order an application for android?

Question

Android

I ordered work on Habr.freelance many times. But I ordered what I understand. I don't understand application development at all. Therefore I ask.
We need to make an application that displays text and plays audio recordings from its database. There is no design at the first stage. You need to screw the donate button, and show me how to put the application on the play market.

1) What to ask the programmer, so that I can then separately ask the designer to "pull" the design without contacting the first developer?
2) What to ask a programmer so that you can then ask another programmer to add functionality without repeating the work from scratch?
3) Approximately how much would it cost?

Answer 1

What to ask the programmer, so that I can then separately ask the designer to "stretch" the design without contacting the first developer?

So it doesn't work. Design first, app later. This is not a WordPress landing page.

What to ask a programmer so that you can then ask another programmer to add functionality without repeating the work from scratch?

Source. Ideally with good architecture.

Approximately how much would this cost?

From zero to infinity.

Answer 2

For starters, you would have compiled a sane TK.
For example, according to your description, I did not understand either the functionality of the application, or, accordingly, the amount of work on it.