# Alarm Clock HD vs World Clock

The clearest difference is in-app purchases: World Clock at none against Alarm Clock HD's 11. World Clock also leads on ads (none vs shown) and iOS requirement (13.0 vs 17.6). Alarm Clock HD's advantage is update cadence (fortnightly vs every 6 months) and ratings volume (104K vs 8). On price, rating and device support there is nothing between them.

Both are free to download. Alarm Clock HD sells 11 in-app purchases, starting at $1.49 per month. World Clock asks for nothing beyond the download.

Alarm Clock HD holds the better App Store score, 4.5 against 4.4. That said, the two scores are not equally well evidenced: Alarm Clock HD has 104K ratings behind it against 8, so its average is the more settled of the two.

Alarm Clock HD ships an update fortnightly, World Clock every 6 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Alarm Clock HD | World Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (104K ratings)](https://appshunter.io/ios/app/alarm-clock-hd/id476555713/reviews)** | [4.4 (8 ratings)](https://appshunter.io/ios/app/world-clock/id1584215960/reviews) |
| Number of ratings | **104K** | 8 |
| Positive reviews | 31.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 6 months |
| Monetization | Freemium | **Free** |
| Size | 234 MB | 2 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Impala Studios](https://appshunter.io/developer/1063279743) | [Apple](https://appshunter.io/developer/284417353) |

## 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 (11)**

| 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 |
| Premium yearly | $29.99 | 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


### World Clock

[App page](https://appshunter.io/ios/app/world-clock/id1584215960)

Easily check the current time, sunrise, and sunset in multiple cities worldwide. Compare time zones and add complications to your watch face for quick access.

**Highlights:** Global time checking, Sunrise and sunset times, Customizable city lists, Watch face complications, Time zone comparison

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Alarm Clock HD free?

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

### Is World Clock free?

World Clock is free to download, with no in-app purchases.

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

Alarm Clock HD is rated higher. Alarm Clock HD averages 4.5 out of 5 from 104K ratings, while World Clock averages 4.4 from 8 ratings.

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

Alarm Clock HD shows ads; World Clock does not.

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

Alarm Clock HD ships an update fortnightly, and World Clock every 6 months. Most recently, Alarm Clock HD was updated on October 24, 2026 and World Clock on October 22, 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.*