Circadian Calc

100+
Downloads
Content rating
Everyone
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About this app

This app contains three calculators (and a clock) that may be useful for people with a circadian rhythm disorder, particularly Non-24 Hour Sleep/Wake Disorder (N24SWD). Circadian rhythm disorders affect bodily processes, particularly the sleep and wake cycle. It’s a completely free program with no hidden purchases or advertising that is provided to assist the N24SWD community.

This multi-tabbed app contains:
A calculator that allows you to work out a future wake or sleep time (Future Calc) by specifying your day length.

A report generator (Report) that shows you a sequence of future wake and sleep times. It’s also possible to export a list of times to services such as Google Drive in a variety of useful formats.

Time Calc is a general purpose calculator that allows you to add two times together.

Clock shows a visual representation of how long you have been awake along with a predicted sleep time and a calculation of your own ‘equivalent time’ according to your wake time.
Updated on
Aug 23, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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App support

About the developer
Michael Robin Reed
mike@unmusic.co.uk
United Kingdom
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