Kurviger is a route planner and navigation service for motorcyclists, designed to find winding roads rather than the fastest route. It has five curvature settings, from fastest to all curvy route modes, with separate settings for individual route sections. The planner calculates round trips of up to 600 km and lets you avoid toll roads, ferries, motorways, main roads, narrow roads or unpaved roads. It also offers an elevation diagram, GPX upload, map overlays and a community for sharing routes. Kurviger is available as a web planner and as an app for Android and iOS, with Android Auto, Apple CarPlay, voice guidance and offline maps.
The service is operated by KURVIGER GmbH in Wernau, Germany. Kurviger is not open source and has no self-hosting option. The pages consulted do not state where data is hosted or which map data is used, so check this in the privacy policy before deploying the service. For European organisations and groups, this is a German provider with no foreign parent company stated.