Gadgetbridge is an Android (4.4+) application which will allow you to use your Pebble, Mi Band, Amazfit Bip and HPlus device (and more) without the vendor's closed source application and without the need to create an account and transmit any of your data to the vendor's servers. When starting Gadgetbridge the first time, it will automatically attempt to discover and pair your Mi Band. Alternatively you can invoke discovery manually via the "+" button. It will ask you for some personal info that appears to be needed for proper steps calculation on the band. If you do not provide these, some hardcoded default "dummy" values will be used instead.