RunnerUp

Yes — completely. RunnerUp is open source under the GPL-3.0 license, with no ads, no in-app purchases, and no user account or registration required. You can install it from Google Play or F-Droid, and anyone can inspect or contribute to the code on GitHub.

Yes. After you authorize an account in the settings, RunnerUp automatically uploads finished activities to Strava with a single click. It also supports Runalyze, RunKeeper, RunningAHEAD, and WebDAV, and some services additionally support downloading history and feed updates — see the sync wiki page for details.

RunnerUp supports Bluetooth SMART (BLE) heart rate chest straps, including many Polar and Zephyr sensors. The Google Play version also supports ANT+ monitors. You can configure personal heart rate zones, and audio cues will alert you when you leave your target zone mid-workout.

Both builds come from the same open source code, but the F-Droid build removes features that depend on non-free libraries or API keys: the MapBox map layer, the Wear OS companion app, ANT+ heart rate support, and Runalyze/Dropbox upload. The two versions can even be installed side by side, and feature releases usually land on both.

Yes. RunnerUp includes a workout designer modeled after Garmin's interval workouts, so you can build structured sessions with repeats, recovery periods, and target pace or heart rate segments. Audio cues coach you through each step of the workout, and you can share your favorite workouts with friends by email.