HTTPS SSH
Mirror Mirror - non-reversing mirror (Android app)
https://f-droid.org/repository/browse/?fdid=org.bitbucket.tickytacky.mirrormirror

See what your front camera sees

No ads
No permissions except camera
Hides status bar
Keeps screen on
No other silly features -> size only 7 kB

Source code: https://bitbucket.org/tickytacky/mirrormirror
GPLv2+ licensed.