# onlyAlarm vs Binary Clock

The clearest difference is in-app purchases: onlyAlarm at none against Binary Clock's 1. onlyAlarm also leads on iOS requirement (16.6 vs 26.0). Binary Clock's advantage is update cadence (daily vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Binary Clock sells 1 one-off in-app purchase. onlyAlarm asks for nothing beyond the download.

onlyAlarm ships an update every 4 months, Binary Clock daily. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | onlyAlarm | Binary Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Daily** |
| Size | 1 MB | 7 MB |
| Requires iOS | **16.6** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [景洙 李](https://appshunter.io/developer/1762531319) | [Super, Inc.](https://appshunter.io/developer/439129974) |

## What reviewers say

### onlyAlarm

[App page](https://appshunter.io/ios/app/onlyalarm/id6740790608)

**Features:** macOS Compatibility

**In-app purchases:** none


### Binary Clock

[App page](https://appshunter.io/ios/app/binary-clock-standby/id6786876264)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Binary Clock Pro | $2.99 | one-time |


## Frequently asked questions

### Is onlyAlarm free?

onlyAlarm is free to download, with no in-app purchases.

### Is Binary Clock free?

Binary Clock is free to download, with in-app purchases available.

### Do onlyAlarm or Binary Clock have ads?

Neither onlyAlarm nor Binary Clock shows ads.

### Which is updated more often, onlyAlarm or Binary Clock?

onlyAlarm ships an update every 4 months, and Binary Clock daily. Most recently, onlyAlarm was updated on October 30, 2026 and Binary Clock on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*