iOS developer by night
https://silentshark.app - Tactical map-based WW2 submarine simulator for iOS, Android, Mac, PC, Linux, Web
https://smoothtrack.app - VR-style head tracking app (iOS + Android) for PC sim games. Replaces the need for a $150+ TrackIR system.
https://mindscopeapp.com - Text canvas outliner, thought organizer (macOS, iOS)
http://appstore.com/johngoering - other apps