Use APKPure App
Get CH55x Programmer V2 old version APK for Android
Questa app è per la serie CH55x di WCH
This App is for the CH55x Series from WCH,
You can directly flash over your Smartphone via the USB port.
Now with support for V2.31 Bootloader
Currently supported micros:
CH551
CH552
CH553
CH554
This is nearly the same Program like my V1 Ch55xProgrammer but since i forgot the cert key i had to publish a whole new app.
Many thanks to: https://github.com/rgwan/librech551