OwnTracks is an open source location-sharing project with iOS and Android apps that publish periodic location updates to a server you control. It emphasizes privacy and user authorization, supports personal location history, and documents HTTP and JSON interfaces for self-hosted backends in the official booklet.
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OwnTracks pricing questions
Is OwnTracks free?
Yes. OwnTracks has an ongoing free plan. Open source apps and documentation with self-hosted backend; no product subscription prices on the booklet homepage.
How much does OwnTracks cost?
OwnTracks is listed as free. No paid plan with a published price was found.
Does OwnTracks have an API?
API or developer access is mentioned. Booklet documents Location API, JSON, and HTTP interfaces for integrating self-hosted OwnTracks backends.