# AtCoder Alarm vs Sleepyhead Alarm

The clearest difference is ads: AtCoder Alarm at none against Sleepyhead Alarm's shown. AtCoder Alarm also leads on update cadence (daily vs every 3 months) and monetization model (free vs ad-supported). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AtCoder Alarm ships an update daily, Sleepyhead Alarm every 3 months. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | AtCoder Alarm | Sleepyhead Alarm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (3 ratings)](https://appshunter.io/ios/app/sleepyhead-alarm/id6738413481/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 3 months |
| Monetization | **Free** | Ad-supported |
| Size | 27 MB | 45 MB |
| Requires iOS | **15.5** | 18.1 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kiichi Ito](https://appshunter.io/developer/1505735244) | [Fumiya Oba](https://appshunter.io/developer/1780757348) |

## What reviewers say

### 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


### Sleepyhead Alarm

[App page](https://appshunter.io/ios/app/sleepyhead-alarm/id6738413481)

Set recurring alarms with a start and end time, and a notification interval. Save frequently used alarms as favorites for quick access. The alarm functions even when the device is in sleep mode or on the lock screen.

**Highlights:** Set alarms with start/end times and intervals, Save and load favorite alarm configurations, Works in sleep mode and on lock screen, Simple, clutter-free interface, Notification-based alarms

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AtCoder Alarm free?

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

### Is Sleepyhead Alarm free?

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

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

Sleepyhead Alarm shows ads; AtCoder Alarm does not.

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

AtCoder Alarm ships an update daily, and Sleepyhead Alarm every 3 months. Most recently, AtCoder Alarm was updated on October 15, 2026 and Sleepyhead Alarm on October 24, 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.*