Optical transfer
Nothing here touches the network. Turn on airplane mode and try it.
Steady: 6 frames a second. Slower is often faster overall — a frame the other camera misses is worth nothing.
Starting…
Compare on both screens
If the digits differ, stop. Do not retry.
How to send
Both devices need a camera. You compare five digits before anything leaves this screen.
No camera needed on this device, for a locked machine that only has a screen. Anyone who can see this screen, or photograph it, can read the file.
Turn screen brightness up.
Now point this device at the other code.
Storage is not durable here. Pairings may be forgotten after a week. Add to Home Screen to keep them.
A new build is available. It is downloaded but not running.