There are two Android apps for updating FW on the TinySA'S and NanoVNA H and H4's.
1- StmDfuUsb
2- StmDfuBlue for those who have installed bluetooth modual.
Both will install dfu, bin or hex files.
The apps will work on Android Cellphones or Android tablets.
The apps are available on the Play store and Google app store.
Clyde Lambert KC7BJE