Don’t get me wrong, fragmentation certainly exists in Android, but screen resolutions and sizes are not the main issue.

Fragmentation is both a strength and weakness of the Android ecosystem, a headache for developers that also provides the basis for Android’s global reach. Android devices come in all shapes and sizes, with vastly different performance levels and screen sizes.

F.lux makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day.

It's even possible that you're staying up too late because of your computer. You could use f.lux because it makes you sleep better, or you could just use it just because it makes your computer look better.

"Screen Toaster propose la réalisation de Screencast sans logiciel installé, directement depuis votre navigateur."