Have you tried this open-source app:

https://github.com/izivkov/gshock-smart-sync-webapp

Thanks for sharing this! I'm also looking for an alternative to the official app, since having to log in with an account and accepting a privacy policy every time I want to change the time on my watch is pretty ridiculous – unfortunately I think this doesn't quite fit my use case as usually I'll want to sync the time when I go to a different country, and I'll normally only have my iPhone with me, which won't support WebBluetooth. But this tool might be a starting point to fork and build a capacitor app with that can run on the phone I suppose.

You make it sound like rocket science or huge bother.

If you're a hacker/dev/tech nerd, that's trivial. You do similar things twice before breakfast without thinking about it.

I use this app on android : https://f-droid.org/en/packages/org.avmedia.gshockGoogleSync...

You can use the app without hosting it yourself:

http://gshock.avmedia.org

I mean... this is Hacker News. A lot of the audience would be excited about an self-hosted alternative.

Have you seen what vibe-coded slop it is? It's WILD.

https://github.com/izivkov/CasioGShockSmartSync/activity

You linked to the Android app there, not the experimental webapp linked above – I'm wondering what gave you that idea though? Those commit messages look pretty human to me, don't think an LLM would ever just commit 'WIP' or 'code cleanup', it's also 4 years old, before the height of vibe coding.

I can imagine the author may have used an LLM for this webapp version of it though

It is hard to reverse-engineer the Casio protocol by vibe-coding. Have you tried it?