# Alarm Clock HD vs Flip Clock 3D

The clearest difference is review sentiment: Flip Clock 3D at 100% against Alarm Clock HD's 32%. Flip Clock 3D also leads on rating (4.8 vs 4.5) and iOS requirement (12.0 vs 17.6). Alarm Clock HD's advantage is ratings volume (104K vs 24). 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 Flip Clock 3D sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Flip Clock 3D holds the better App Store score, 4.8 against 4.5. 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 point the same way: 32% of Alarm Clock HD's written reviews are positive against 100% of Flip Clock 3D's.

Alarm Clock HD ships an update fortnightly, Flip Clock 3D weekly. The most recent releases landed on September 28, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Alarm Clock HD | Flip Clock 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (104K ratings)](https://appshunter.io/ios/app/alarm-clock-hd/id476555713/reviews) | **[4.8 (24 ratings)](https://appshunter.io/ios/app/flip-clock-3d-study-time/id6670719398/reviews)** |
| Number of ratings | **104K** | 24 |
| Positive reviews | 32.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 230 MB | 206 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Impala Studios](https://appshunter.io/developer/1063279743) | [乃君 黄](https://appshunter.io/developer/1337343608) |

## 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


### Flip Clock 3D

[App page](https://appshunter.io/ios/app/flip-clock-3d-study-time/id6670719398)

Enhance your workspace with a realistic 3D mechanical flip clock. This app helps improve focus and productivity during work or study sessions by providing a clear time display. Customize with various fonts and themes, and utilize the alarm feature when the app is active.

**Highlights:** Vivid 3D mechanical components, Adjustable viewing angles, 12/24 hour mode switching, Multiple font and theme options, Foreground alarm functionality

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all contents | $1.99 | one-time |


## Frequently asked questions

### Is Alarm Clock HD free?

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

### Is Flip Clock 3D free?

Flip Clock 3D is free to download, with in-app purchases available.

### Which has better reviews, Alarm Clock HD or Flip Clock 3D?

Flip Clock 3D is rated higher. Alarm Clock HD averages 4.5 out of 5 from 104K ratings, while Flip Clock 3D averages 4.8 from 24 ratings.

### Do Alarm Clock HD or Flip Clock 3D have ads?

Both Alarm Clock HD and Flip Clock 3D show ads.

### Which is updated more often, Alarm Clock HD or Flip Clock 3D?

Alarm Clock HD ships an update fortnightly, and Flip Clock 3D weekly. Most recently, Alarm Clock HD was updated on September 28, 2026 and Flip Clock 3D on September 24, 2026.

---

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