[APP][Free] 90night- A Sleep Cycle Calculator


New member
Jan 7, 2013
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Hey everyone!

I have developed an app that calculates the most optimal times for you to wake up based on the fact that sleeping works in cycles of 90 minutes (similar to the idea of the website sleepyti.me). That's why sometimes you might have a ton of hours of sleep yet still feel cranky (because you most likely woke up in the middle of one of your cycles).

Here are the links: free version and paid version

Features included in 90night:

  • The ability to set how long it takes you to fall asleep and 90night will use that time in it's calculations
  • Support for both 12/24 hour format (with the ability to change them)
  • A night mode for using a dark theme for the app
  • Buttons to set alarms for each time (with optional confirmation box which can be enabled in the settings)

I am planning on fixing up the design for the buttons and it should look quite beautiful. If you guys want I'll post a screenshot of the proposed UI update (will start it in the next day or so). I am also planning on incorporating widgets in some way.

Thank you all and I can't wait to hear your feedback! Let me know if you have any questions, feature requests, bugs/issues, or anything else.
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