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RunnerUp vs Fitness Calendar: catalog facts
RunnerUp	Fitness Calendar
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under GPL-2.0-only.
Android	Android
Highly configurable audio cues during a run Target pace and heart rate zone workouts	Tracks activities and records sessions Imports GPX files and supports custom activity types
Android only Documentation is a community wiki rather than a polished guide	Internet access is needed if you enable MapLibre maps
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-2.0-only
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.