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Universal Timers vs Interval Timer: catalog facts
Universal Timers	Interval Timer
Free Free and open source under GPL-2.0.	Free Free and open source under the MIT licence.
Android	Android
Configurable work and rest blocks with repetitions Can adjust durations progressively during a session	Quick setup of active and rest times Minimal, easy interface
Android app only Focused on interval training	Basic feature set Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: MIT
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it 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.