I’m currently using the Nothing CMF Pro 2.
You configure it with the proprietary app to get the initial paring key, then you can switch to Gadgetbridge and disable or even remove the Nothing app.
The Good: cheap device cost, nice UI elements, machined aluminum bezel looks premium. Push notifications and most features work.
The Bad: semi-annoying workaround to get it set up initially, not all features work, not using the proprietary app disables using the Nothing watch face library so you’re stuck choosing from the 5 or 6 default designs that come with the watch.





I like the idea, but don’t just buy these assuming you’re good to go, and then walk around with a normie iPhone or Android device that phones home constantly with your precise location and device ID, SIM information etc.
There is always at least some error rate and deniability in probabilistic matching by something like facial recognition. There is a lot less deniability of your specific device ID, tied to your real identity (thanks to KYC laws), being in X location at Y time.