What is Reddit's opinion of 90night: SleepyTime Calculator?

From 3.5 billion Reddit comments

For Android it doesn't get much better than 90night

Discipline and adjusting your sleeping environment.

One of my best sleep experiences was a basement level shared dorm. Fortunately no one was snoring when I stayed there but the biggest thing for me was it was pitch black in the room and the silence helped too.

Stick to a sleep schedule but you'll have to make sacrifices. You can sacrifice your productivity and your ability to pay bills or you can sacrifice a few hours from your evening fun.

When I had an Android phone, I would use the 90night app https://play.google.com/store/apps/details?id=com.jonathannakhla.sleeptimecalculator&hl=en_US

Now I just use https://sleepyti.me/ through my phone browser.

You can tell the apps when you need to wake up and they'll give you ideal times to fall asleep. Or you can hit the button that says you want to sleep now and it will tell you when you should wake up.

You can also use this free Android app: https://play.google.com/store/apps/details?id=com.jonathannakhla.sleeptimecalculator&hl=en