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Curbox vs TimeLimit.io: catalog facts
Curbox	TimeLimit.io
Free Free and open source under the GPL 3.0 or later.	Free Open source under GPL-3.0 and available through F-Droid.
Android	Android
Blocks Reels and Shorts without blocking the whole app Wide choice of unlock challenges, including NFC and QR codes	Per-category allowed time windows Daily usage duration limits
Android only Self-imposed limits can still be worked around by a determined user	Android only Homepage gives little detail about features
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	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.