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Hacker's Diet Offline vs openScale: catalog facts
Hacker's Diet Offline	openScale
Free Free and open source under the GPL-2.0-or-later license.	Free Free and open source under the GPL-3.0 licence.
Android	Android
Tracks weight and exercise Uses a weighted moving average to show weight trends	Supports many Bluetooth smart scales without vendor apps No account required
Android only Online synchronization is optional and uses Hacker's Diet Online	Android only Google Play version is offered as an open beta
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: GPL-3.0
Not stated if an account is needed	No account needed
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 September 23, 2026

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