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Gadgetbridge vs G-Shock Smart Sync: catalog facts
Gadgetbridge	G-Shock Smart Sync
Free Free and open source, funded by donations.	Free Free and open source.
Android	Android
Replaces proprietary companion apps for many wearables Supports a very wide range of device types	No Casio ID needed Supports G-Shock, Edifice and Pro Trek models
Android only Some devices need extra pairing steps or vendor keys	Unofficial and not supported by Casio Android only
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: Apache-2.0
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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