DownG Android apps are free Xiaomi-Ninebot compatible apps made by CamiAlfa.

They can read version of BMS, DRV, and BLE; and upload firmware to these devices using properly made ZIP files. (see below)

M365 DownG can be used on M365 and M365 pro scooters. App preview:

Get M365 DownG on Play Store

ES DownG can be used on ESx, SNSC, and KS Max (!) scooters. App preview:

Get ES DownG on Play Store