I made a small app for firefighters. The goal is to get to know your local engine while sitting on the toilet.
I released the app on the google and apple store for free. To get my investment back (time and running costs) i choosed to bill the fire-stations per vehicle. My goal here was to go as little as possible with the pricing.
The app is written in Flutter, backend a mix of spring and vaadin.
Current market are german fire stations (Most of the fire stations in germany are volunteer based)
https://play.google.com/store/apps/details?id=dev.hvoss.fahr...
https://apps.apple.com/us/app/id1507208896
Landingpage: http://fahrzeugkunde.hvoss.dev/