BinaryClockWatch
Time in 13 number systems
Only for Watch
Free
Apple Watch
Time in 13 number systems as watch face complications: binary, BCD, Roman, Mayan, Fibonacci, I Ching and more. Time, rethought, right on your wrist.
BinaryClockWatch doesn't show the time like every other watch. It shows it in 13 different number systems, right on your watch face as a complication.
From binary and BCD (binary-coded decimal) to octal, hexadecimal, Gray code, balanced ternary, Fibonacci, Babylonian base 60, Braille, Mayan numerals, Roman numerals, Cistercian monk numerals and the I Ching: every system shows hours and minutes its own way, with 20 complications for every watch face family.
FEATURES
• 13 number systems as watch face complications
• Concentric rings, BCD dot grids or inline text, depending on the system
• Separate hour and minute rings for more flexibility
• Corner complications with a curved dot line along the edge of the watch face
• Automatic color adaptation to your system theme
• Built-in guide with an explanation and a live example for each of the 13 systems
• Completely free: no ads, no in-app purchases, no data collected
For everyone who would rather read the time than just glance at it, and for everyone who finds number systems fascinating.
BinaryClockWatch runs independently on Apple Watch, no iPhone app required.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improved translations in all 16 languages and clearer complication names in the watch face editor. Now available in many more countries.
The developer, Christian Koys, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Christian Koys
- Size
- 1.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Christian Koys