Apps like Duo Mono

Here are some great alternatives to Duo Mono by Octathorp :
Dual Screen Experience Example
Dual Screen Experience Example
★3.4
Screen Off Timeout
Screen Off Timeout
★4.3
Shake Screen On Off PRO
Shake Screen On Off PRO
★3.7
Screen Off and Lock
Screen Off and Lock
★4.0
Turn Off Screen
Turn Off Screen
★3.5
KinScreen: Screen Control
KinScreen: Screen Control
★3.9
One Button Navigation Bar
One Button Navigation Bar
★4.1
Double Tap
Double Tap
★3.5
SL Screen Off plugin
SL Screen Off plugin
★3.9
Video screen off: Screen Sleep
Video screen off: Screen Sleep
★4.0
Gravity Screen - On/Off
Gravity Screen - On/Off
★3.9
Keep Screen On
Keep Screen On
★3.7
Double Tap Off
Double Tap Off
★3.5
Double Tap Screen Off Launcher
Double Tap Screen Off Launcher
★4.6
Screen Off
Screen Off
★4.2
Sleep Screen
Sleep Screen
★3.4