The gotchas are structural, not personal. A fixed price quoted against a written spec turns adversarial the moment reality departs from the document. The milestone and deploy clauses to write instead, what Upwork escrow really covers, who owns the code, and the handover checklist to run before final payment.
How to Get Your App Idea Built When You’re Not a Developer
Fully planned out usually means the features are decided and nothing else is. What a non-technical founder needs to settle about the backend, the monthly running cost, the app store rules and version one before hiring anyone to build a mobile app.