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Opal vs SelfControl: catalog facts
Opal	SelfControl
Freemium Free to download, with a paid Opal Pro subscription for more features.	Free Free and open source, supported by donations.
macOS, Android, iOS	macOS
App blocking rules that apply on phone and desktop Focus timer that locks apps until it runs out	Block cannot be undone until the timer expires Survives restarts and deleting the app
Some features require the paid Pro subscription Gamified rewards and friend invites may not suit everyone	macOS only No way to end a block early if you set it wrongly
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account 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 1, 2026

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