https://communityhub.strava.com/insider-journal-9/an-update-to-our-developer-program-13428
The gist of it is that Strava just killed its free API, and will now require developers to have a subscription.
At Strava, we care deeply about developers, and the health of the developer ecosystem. There are now 241,000 Strava API developers, up from 185,000 last year. Starting today, all current and future applications will automatically receive access to the Standard developer tier. This allows you to serve up to 10 athletes and start building immediately, completely eliminating the previous queue.
This essentially kills thousands of tools people build using the free API.
If you’re looking to move away from Strava, so far I’ve found four open source alternatives:
- CubeTrek - Open-source GPS track manager with 3D topography visualization for outdoor activities.
- Endurain - Self-hosted fitness tracking service for running, cycling, and more with full data control.
- RunnerUp - An open source run tracker for Android.
- Geo Activity Playground - Data analysis and visualization based on GPS tracked outdoor activities.



RunnerUp is an app ive been using for a while and it does the basic gps tracking for your activities and even has an option to tell you if your pace is slower or faster than you set. You can connect it to your Strava account to upload data to if you want, but otherwise the data is on your device. I don’t know about smartwatch compatibility, but I use the phone app and just put my phone in my Nathan’s Belt.