With DRONE FIRMWARE FLASHER your FPV quad will be always up to date. You can update it any time, anywhere without PC and race or fly acro. All you need is your phone and USB OTG cable.
Supported flight controller software:
Tested with F1, F3, F4 and F7 flight controllers
CC3D is supported but not through main usb. You have to use external usb to serial adapter.
Requires USB host support and and USB OTG cable.
Flashing is only possible through USB OTG cable. Bluetooth is not supported.