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one sec vs PlugBrain: catalog facts
one sec	PlugBrain
Freemium Free to download, with optional paid features.	Free Free and open source under the GPL-3.0 licence.
Android, iOS	Android
Adds friction before opening chosen apps instead of only hard blocking Can also block websites	Math challenges add friction instead of a hard block Difficulty adapts to how often you open the apps
Closed source Pricing for extra features is not detailed on the homepage	Android only No releases published on the GitHub repository
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
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.