Price estimate: 0-20€ / month
Time: Early-stage, pre-funding
Use Case: Do this only in case you know how to program an app (coded) or in case you have a very use case in mind (nocode tools).
Price estimate: 6000€+
Time: Seed-stage, Series A+
Use Case: Partner with Björn @ Penguin Digital to get an app with lots of functionalities. Penguin Digital even developed apps for governments.