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Study Tracker vs SkillApp: catalog facts
Study Tracker	SkillApp
Free Free and open source under Apache-2.0.	Free Free and open source with no ads.
Android	Android
Organizes study work into hierarchical projects and units Records session time and calculates progress	Fully offline with no internet access No ads or data collection
Currently available only in Chinese Android only	Android only Few features beyond timing skills
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: GPL-3.0
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 2, 2026

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