

Kotlin / Java, Swift, AI driven development
Offline maps, GPS tracking, routes, navigation and Bluetooth sensors, also as apps for your own hardware
Live transfer of positions and status to portals and web services, data capture in the field with GPS
Updates, store maintenance, support

Bike navigation and training app for Android and iOS. My own product since 2012. Over 1 million downloads and a 4.5 star rating.

Jespr is a bike computer from Switzerland, built for cycling enthusiasts. I have been responsible for the complete app development since 2017.

Tourinfra mobil is the mobile companion for tourinfra customers: infrastructure such as signs and benches is managed and captured directly in the field, with GPS. I have been developing the app for green-solutions since 2018.

Wintermanager sends the position of the grooming machines and the condition of the trails live from the driver's cab to the cross-country portal xc-ski.de, the destination's website and many other winter sport portals. Guests see immediately which trails were freshly groomed. I have been developing the app for green-solutions since 2020.

leichtR sends each message to the smallest possible number of friends, disturbs them only as far as they agree to, and avoids any moral pressure.

An app to analyze and improve your soft skills, available for iOS and Android. My role: complete app development.