AtCoder Alarm vs Sleepyhead Alarm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AtCoder Alarm
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.
- Solve programming problems to stop alarm
- Random AtCoder "A" task selection
- Ensures waking up
- Requires AtCoder pre-registration
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This App is an alarm clock that doesn't stop until solving an easy problem of AtCoder (competitive programming web site). The problem is chosen randomly from "A" tasks of past ABCs. Let's make sure to wake up! * Pre-registration with AtCoder is required.
Sleepyhead Alarm
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.
- 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
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Multiple Alarms with Three Simple Steps: By selecting a start time, end time, and notification interval, then tapping the alarm button, you can set alarms at specified intervals for the designated time period. Easily Register Favorites: Once you've set an alarm, just tap the “Add to Favorites” button. After that, you can load that alarm anytime with a single tap. Simple Design: It’s easy to use because there are no unnecessary features besides the alarm! Works in Sleep Mode for Your Peace of Mind: The alarm continues to ring only when your device is in sleep mode or on the lock screen, so it won’t bother you once you’re already awake. Important Note: Because this app uses notifications for alarms, if your device is in silent mode or set to vibrate only (where notification sounds are turned off), the alarm will not sound.
Screenshots
Verdict
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.
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.
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.
| Parameter | AtCoder Alarm | Sleepyhead Alarm |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (3 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | — | 3 — better |
| Update frequency | Daily — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.5 — better | 18.1 |
| Further details — not scored | ||
| Size | 27 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Kiichi Ito | Fumiya Oba |
Customer experience
AtCoder Alarm
Sleepyhead Alarm
In-app purchases
AtCoder Alarm
No in-app purchases
Sleepyhead Alarm
No in-app purchases
Questions
Is AtCoder Alarm free?
Is Sleepyhead Alarm free?
Do AtCoder Alarm or Sleepyhead Alarm have ads?
Which is updated more often, AtCoder Alarm or Sleepyhead Alarm?
Other comparisons
