Supported devices. Mi Band 5, Mi Band 4, Mi Band 3, Mi Band 2, Mi Band HRX. Amazfit GTS, Amazfit GTR, Amazfit Verge Lite, Amazfit Bip S, Amazfit Bip/Lite, Amazfit Band 2, Amazfit Cor Amazfit Arc. This app works with or without the original Mi Fit / Amazfit app If you have a connection problem.