# Alarm Clock HD vs SClock

The clearest difference is ratings volume: Alarm Clock HD at 104K against SClock's 24. Alarm Clock HD also leads on rating (4.5 vs 4.3). SClock's advantage is review sentiment (50% vs 32%). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Alarm Clock HD sells 10 in-app purchases, starting at $1.49 per month and SClock sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Alarm Clock HD holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: Alarm Clock HD has 104K ratings behind it against 24, so its average is the more settled of the two. Written reviews complicate that: 32% of Alarm Clock HD's written reviews are positive against 50% of SClock's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on September 26, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Alarm Clock HD | SClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (104K ratings)](https://appshunter.io/ios/app/alarm-clock-hd/id476555713/reviews)** | [4.3 (24 ratings)](https://appshunter.io/ios/app/sclock-big-digital-clock/id1633448389/reviews) |
| Number of ratings | **104K** | 24 |
| Positive reviews | 32.0% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Freemium | Free with in-app purchases |
| Size | 230 MB | 30 MB |
| Requires iOS | 17.6 | **16.1** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Impala Studios](https://appshunter.io/developer/1063279743) | [Hajime Suzuki](https://appshunter.io/developer/1615906018) |

## What reviewers say

### Alarm Clock HD

[App page](https://appshunter.io/ios/app/alarm-clock-hd/id476555713)

Wake up gently with your favorite music or sounds using this advanced alarm clock. It offers customizable nightstand displays, sleep tracking, and a sleep timer to help you unwind. Enjoy features like local weather and an instant flashlight, with an option to go ad-free via subscription.

**Highlights:** Unlimited alarms with Apple Music or custom sounds, Sleep tracking, Customizable nightstand display, Sleep timer, Local weather information, Instant flashlight, Screen saver for OLED displays

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium member - 1 month | $1.49 | per month |
| Premium Features - Weekly | $1.99 | per 7 days |
| Premium Features - Monthly | $2.59 | per month |
| Upgrade to Premium Features | $5.49 | per 6 months |
| Premium Yearly | $9.99 | per year |
| Premium Yearly | $11.99 | per year |
| Upgrade Your Alarm Clock | $14.99 | per year |
| Premium yearly | $19.99 | per year |
| Premium yearly | $19.99 | per year |
| Premium yearly | $24.99 | per year |

**What reviewers like**

- 🚀 Reliable alarm clock
- 🎨 Customizable colors
- 🔊 Ability to use music as alarm
- 💤 Gradual volume increase

**What reviewers complain about**

- 🐛 Alarm not going off
- 🔍 Difficulty seeing small buttons/text
- 💸 Subscription model for ad-free version
- 🔋 High battery consumption
- 🔇 Alarm muting phone volume

**Reported bugs**

- Alarm randomly snoozing itself
- Alarm not working when phone is muted
- Alarm sound not playing
- Alarm screen freezing/crashing

**Requested features**

- 24-hour clock option
- More alarm sounds/tones
- Ability to use own music files
- Do not disturb mode


### SClock

[App page](https://appshunter.io/ios/app/sclock-big-digital-clock/id1633448389)

This app offers a customizable clock with adjustable display sizes and color options. It features dual timers with customizable sounds and visual cues, perfect for time management tasks like Pomodoro.

**Highlights:** Adjustable display size, Color selectable clock face, Dual timer functionality, Customizable countdown sounds, Color-coded time display, Simple, easy-to-read design

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| premium | $0.99 | per month |


## Frequently asked questions

### Is Alarm Clock HD free?

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

### Is SClock free?

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

### Which has better reviews, Alarm Clock HD or SClock?

Alarm Clock HD is rated higher. Alarm Clock HD averages 4.5 out of 5 from 104K ratings, while SClock averages 4.3 from 24 ratings.

### Do Alarm Clock HD or SClock have ads?

Both Alarm Clock HD and SClock show ads.

### Which is updated more often, Alarm Clock HD or SClock?

Alarm Clock HD ships an update fortnightly, and SClock fortnightly. Most recently, Alarm Clock HD was updated on September 26, 2026 and SClock on September 8, 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.*