New Paid
SHL QR 21 Watch Face
Four concurrent time formats on a single dial.
Downloads1+
Total reviewsNo data available
Average scoreNo data available
Released on Google PlayAug 4, 2026
Last updated on Google PlayAug 5, 2026
DiscoveredAug 14, 2026
Last updatedAug 14, 2026
Welcome to QR 21. You have selected a watch face designed for a distinct tech aesthetic that organizes detailed data in a clean, visually balanced layout.
Each of the four unique time-telling formats could easily be a standalone watch face on its own. QR 21 packs them together into a single, aesthetically pleasing, and highly organized display.
Four Concurrent Time Formats
The QR Matrix: The core visual engine in the center of your screen is a high-contrast 21x21 QR code that displays a new matrix every minute. Simply open any standard smartphone camera app, point it at your wrist, and your phone will instantly decode the image to display the exact digital time.
Pure Unix Epoch Time: Positioned directly at the top of the dial is a live, ticking 10-digit Unix timestamp. This counts the exact number of seconds that have elapsed since January 1, 1970 (UTC). This specific date and time represents the arbitrary starting point, or "epoch," chosen by early computer scientists to establish a standard universal baseline for digital tracking across all computer operating systems worldwide. Wear OS is also safe from the upcoming "Year 2038" Unix rollover issue, ensuring you can continue to use this watch face for years to come.
Binary Indicators: The left and right borders of the dial feature structural binary tracking columns. The left column monitors the current hour, while the right column monitors the minutes. To make calculation easy, the circles show the specific values you need to add together (1, 2, 4, 8, 32). These numbers map directly to raw binary code (1s and 0s), where an active filled indicator represents a 1 and an empty indicator represents a 0.
The Digital Clock: For a quick numerical reference, the time is prominently displayed in a vertically stacked layout, with the hours column on the left and the minutes column on the right. In each column, the first digit is stacked directly above the second. At first glance, this highly visible display simply tells you the time. However, if you look a little closer, you will discover a hidden layer of complexity. These stacked digits perfectly represent the mathematical sum of the binary values beside them, saving you the trouble of doing the math yourself.
Technical Features & Customization
Modular Interface: Customize your screen's data density. The Unix Time, Binary Clock, Digital Clock, and Battery Status can all be independently enabled or disabled to suit your preferred level of minimalism. As the namesake of the watch face, the central QR code remains your permanent anchor.
6 QR Matrix Styles: Personalize the structural look of the central time engine with six distinct overlays: Classic, Grid, Circles, Lattice, Diamonds, and Hearts.
28 Color Themes: A large selection of named color themes are available to fit your preference and match your style.
Hexadecimal Battery Status: Your watch's power reserve is monitored using a raw hexadecimal value located at the bottom of the dial (labeled P:). This translates your standard battery percentage into an 8-bit hex string, ranging from 0x64 (100% full) to 0x00 (empty).
Dual Format Integration: QR 21 fully supports both 12-hour and 24-hour time for all standard display formats. The watch face automatically reads your paired mobile device's core system configurations, allowing the central QR code, Binary, and Digital clocks to seamlessly shift their output based entirely on your phone's preferences.
Created by Second Hand Labs.
Each of the four unique time-telling formats could easily be a standalone watch face on its own. QR 21 packs them together into a single, aesthetically pleasing, and highly organized display.
Four Concurrent Time Formats
The QR Matrix: The core visual engine in the center of your screen is a high-contrast 21x21 QR code that displays a new matrix every minute. Simply open any standard smartphone camera app, point it at your wrist, and your phone will instantly decode the image to display the exact digital time.
Pure Unix Epoch Time: Positioned directly at the top of the dial is a live, ticking 10-digit Unix timestamp. This counts the exact number of seconds that have elapsed since January 1, 1970 (UTC). This specific date and time represents the arbitrary starting point, or "epoch," chosen by early computer scientists to establish a standard universal baseline for digital tracking across all computer operating systems worldwide. Wear OS is also safe from the upcoming "Year 2038" Unix rollover issue, ensuring you can continue to use this watch face for years to come.
Binary Indicators: The left and right borders of the dial feature structural binary tracking columns. The left column monitors the current hour, while the right column monitors the minutes. To make calculation easy, the circles show the specific values you need to add together (1, 2, 4, 8, 32). These numbers map directly to raw binary code (1s and 0s), where an active filled indicator represents a 1 and an empty indicator represents a 0.
The Digital Clock: For a quick numerical reference, the time is prominently displayed in a vertically stacked layout, with the hours column on the left and the minutes column on the right. In each column, the first digit is stacked directly above the second. At first glance, this highly visible display simply tells you the time. However, if you look a little closer, you will discover a hidden layer of complexity. These stacked digits perfectly represent the mathematical sum of the binary values beside them, saving you the trouble of doing the math yourself.
Technical Features & Customization
Modular Interface: Customize your screen's data density. The Unix Time, Binary Clock, Digital Clock, and Battery Status can all be independently enabled or disabled to suit your preferred level of minimalism. As the namesake of the watch face, the central QR code remains your permanent anchor.
6 QR Matrix Styles: Personalize the structural look of the central time engine with six distinct overlays: Classic, Grid, Circles, Lattice, Diamonds, and Hearts.
28 Color Themes: A large selection of named color themes are available to fit your preference and match your style.
Hexadecimal Battery Status: Your watch's power reserve is monitored using a raw hexadecimal value located at the bottom of the dial (labeled P:). This translates your standard battery percentage into an 8-bit hex string, ranging from 0x64 (100% full) to 0x00 (empty).
Dual Format Integration: QR 21 fully supports both 12-hour and 24-hour time for all standard display formats. The watch face automatically reads your paired mobile device's core system configurations, allowing the central QR code, Binary, and Digital clocks to seamlessly shift their output based entirely on your phone's preferences.
Created by Second Hand Labs.
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