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Opal vs TimeLimit.io: catalog facts
Opal	TimeLimit.io
Freemium Free to download, with a paid Opal Pro subscription for more features.	Free Open source under GPL-3.0 and available through F-Droid.
macOS, Android, iOS	Android
App blocking rules that apply on phone and desktop Focus timer that locks apps until it runs out	Per-category allowed time windows Daily usage duration limits
Some features require the paid Pro subscription Gamified rewards and friend invites may not suit everyone	Android only Homepage gives little detail about features
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-only
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 2, 2026	Official website Full listing and sources Checked October 2, 2026

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