# Alarm Clock vs AtCoder Alarm

The clearest difference is in-app purchases: AtCoder Alarm at none against Alarm Clock's 3. AtCoder Alarm also leads on update cadence (daily vs every 6 weeks). Alarm Clock's advantage is iOS requirement (12.0 vs 15.5). On price, ads and device support there is nothing between them.

Both are free to download. Alarm Clock sells 3 in-app purchases, starting at $2.99 per month. AtCoder Alarm asks for nothing beyond the download.

Alarm Clock ships an update every 6 weeks, AtCoder Alarm daily. The most recent releases landed on October 27, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Alarm Clock | AtCoder Alarm |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Daily** |
| Monetization | — | Free |
| Size | 36 MB | 27 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Abdulla Yasin](https://appshunter.io/developer/1407887788) | [Kiichi Ito](https://appshunter.io/developer/1505735244) |

## What reviewers say

### Alarm Clock

[App page](https://appshunter.io/ios/app/alarm-clock-wake-up-time/id1497464567)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month | $2.99 | per month |
| Three Month | $8.99 | per 3 months |
| One Year | $17.99 | per year |


### AtCoder Alarm

[App page](https://appshunter.io/ios/app/atcoder-alarm/id1671964226)

This alarm clock requires users to solve a simple programming problem to turn it off. Problems are randomly selected from past AtCoder "A" tasks. Ensure you wake up on time with this unique challenge.

**Highlights:** Solve programming problems to stop alarm, Random AtCoder "A" task selection, Ensures waking up, Requires AtCoder pre-registration

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

**In-app purchases:** none


## Frequently asked questions

### Is Alarm Clock free?

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

### Is AtCoder Alarm free?

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

### Do Alarm Clock or AtCoder Alarm have ads?

Neither Alarm Clock nor AtCoder Alarm shows ads.

### Which is updated more often, Alarm Clock or AtCoder Alarm?

Alarm Clock ships an update every 6 weeks, and AtCoder Alarm daily. Most recently, Alarm Clock was updated on October 27, 2026 and AtCoder Alarm on October 15, 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.*