Arc Mini

Arc Mini is an open source companion to Arc App. It provides both a slimmed down subset of Arc's functionality, as well as additional utility views, for inspecting real time recording and debug information.
Arc Mini is best used as a tinker toy for open source developers, or Arc App power users wishing to get the best out of their data, or greater insights into real time timeline recording. However it can also be used as a standalone timeline recording app, with export to GPX and JSON.
Arc Mini integrates with Core Motion to record step counts and accelerometer data, to determine activity types such as walking, running, skateboarding, etc.
Arc App:
https://apps.apple.com/app/arc-app-location-activity/id1063151918
Arc Mini on GitHub:
https://github.com/sobri909/ArcMini