Sleepy Calculator

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Find out the best time to sleep. Wake up between sleep cycles to feel fresh and energized!

Latest reviews

• (2018-08-12) Wes Northcutt: why wont someone just come up with a simple analog alarm clock, if I want to sleep an hour, thts what I want, I've tried at least 10 apps ad extensions and they are to complex or to simple, this particular app? well I don't need a machine (computer) to calculate how much I need to sleep.
• (2016-01-06) nova: I hate it!!!!!!!!!! It sad to go to sleep at 3:46am to wake up at 7:00am! That is not good.
• (2013-08-02) Antonio Saenz: Very simple app that works fine for me. Practical and very useful for waking at a good time to start the day right. Not sure why another user couldn't understand that if it takes her longer than 14 minutes to fall asleep (on average), she should just back up her suggested bedtime by that amount. Stop.Complaining.Be.Grateful.Instead. That's the critical key to happiness.
• (2013-07-09) Joanna Gibson: It doesn't really make sense. I said I needed to get up at 7 and it suggested I go to sleep at 5 in the morning. And it takes longer than 14 minutes for me to fall asleep. This is one app that's going in the trash can.
• (2013-05-21) Blue Blueblueblue: good idea, but on windows8 with chrome at least it does not work well. you might get a suggested sleeping time (sometimes it works properly, sometimes you will find the start mask time again instead of your requested time). But if you try the second section - finding a appropriate waking time for a fixed sleeptime - it does not work at all! you will always find the start mask time in the answer, no matter how often you retype your requested time, restart the app,or even re-install the whole thing! so please: makers of it - IMPROVE it quickly!
• (2013-03-08) Frena Pang: A bit awesome idea, cool app, helps in my sleeping habit a lot. Gotta say it works