Binary vs TetraClock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Binary
This utility displays time using binary code represented by LED-style buttons. It offers customizable display modes, an alarm, and a countdown timer, making it educational for learning binary counting.
- Binary time display
- 24 or 12 hour mode
- Alarm clock functionality
- Countdown timer
- Customizable button colors
- Optional sound alerts
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Display time using LED-type buttons that correspond to binary values for the hours, minutes, and seconds. Educational for learning binary counting. Options: * 24 or 12 hour mode * Alarm Clock * Countdown Timer mode * Optional "beep" sound * Select a variety of colors for the buttons.
TetraClock
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'TetraClock' is a clock app that represents the time by stacking seven types of single-sided tetromino-shaped blocks as they fall. The differences from the paid version are as follows: ・Contains ads ・No Watch App [How to Use] Tap the screen: Open the settings screen. Long press the screen: Stack the blocks again. [Main Features] - Switch between 12/24-hour display - Toggle seconds display ON/OFF - Monotone display - Fill in ON/OFF - Change outline color - Change transition animations - Change falling speed - Change background color [Notices] Due to the animation effect used for changing numbers, there may be a discrepancy between the displayed time and the actual time. Please do not use the displayed time as a basis for important decisions.
Screenshots
Verdict
The clearest difference is ads: Binary at none against TetraClock's shown. TetraClock's advantage is update cadence (every 2 days vs every 13 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Binary ships an update every 13 months, TetraClock every 2 days. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.
| Parameter | Binary | TetraClock |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 13 months | Every 2 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 16 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Wyllys Ingersoll | Legal Prompt Inc. |
In-app purchases
Binary
No in-app purchases
TetraClock
No in-app purchases
