Chinese Remainder Clock

100+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

This app tells time, and allows you to manipulate time, using a Chinese remainder clock.

What is that all about? If an ordinary clock would tell time in the form 10:06:47, then a "Chinese Remainder Clock" tells us this same time in the form 12:021:132. These digits are the remainder after dividing hours by 3 and 4; minutes by 3, 4, and 5; and seconds by 3, 4, and 5. A famous result called the Chinese Remainder Theorem promises that if you know these remainders, you can reconstruct the hour, minute, and second uniquely.

The app, which is meant primarily as a pedagogical tool, offers various designs of a Chinese Remainder Clock, and works with 12- and 24-hour time. Users can experiment with incrementing or decrementing various units to see how the clock works, or can modify the time directly. Just touch the screen to reveal the various options.

The most recent version includes a new quiz mode and all-new clock designs.
Updated on
Mar 26, 2019

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
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

5.0
7 reviews
A Google user
May 2, 2019
thank
2 people found this review helpful
Did you find this helpful?

What's new

This release completely improves the user interface significantly, enables hand manipulation of the clock for all designs, adds more quizzes, and enables "Daydream Mode" for when the device is charging.