You mean with GadgetBridge and Android right? The official app does not have nice conditions when I last read through it. Note that I couldn’t find the 1 month battery mode anymore. Just the pro which sadly has a normal lcd screen and max 1 week battery.

I'm sure this is what commenter meant. GadgetBridge even works without the need of accessing the internet, and open source app that gets regular updates and has a nightly build available. I get my wearables and others from their list of supported devices https://gadgetbridge.org/gadgets/

I use amazfit w/ gadgetbridge as well