EtchDroid - an ISO image flashing tool for Android
EtchDroid - an ISO image flashing tool for Android

github.com
GitHub - etchdroid/etchdroid: An application to write OS images to USB drives, on Android, no root required.

As a tech support channel member I sometimes see people not being able to install or repair a desktop OS because of inability to get another PC to create a bootable medium on. I guess such an app should help them because USB-A to USB-C adapters are much cheaper than computers. The only downside (or probably a feature) is it can't flash official Windows ISOs yet.