Alarm Clock HD vs World Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Alarm Clock HD
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.
- 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
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Sleep better and start the day with your favorite tunes. Are you curious to see how much you slept? Then, track your sleep in the app. Alarm Clock HD is the app to help you enjoy restful sleep and wake up worry-free. How Alarm Clock HD helps you sleep better: • Unlimited Alarms: Apple Music or Alarm Sounds • Customize Nightstand display colors • Sleep Timer • Local Weather Information • Instant Flashlight - shake the device • Full watchOS 2 support • Screen Saver - for devices with OLED display WAKE UP ON TIME: Proper Alarm Settings • Keep the app open and running always to have your alarm go off and play the sounds you’ve set for ‘Music'. When your app is open, you can use the volume slider within the app. When the app is in the background, use the device volume to set your volume. • Make sure your battery is charged and have your notifications turned on before you go to sleep, when the battery level goes below 30% it might not sound. This is due to prevent the device from dying and the alarm not going off. • Keep your Apple Music available on your device The music you can select consists of everything you have available on your ‘Apple Music' app on your device. If the music is saved on your iCloud, and not on the device itself, it won’t be available. NEVER MISS AN ALARM When you close the app and do not have it running in the background, the alarm will use the device volume instead and play the notification sound system. The app will close itself automatically after 10 hours of inactivity. This is due to prevent the device from dying and the alarm not going off. When your device is muted, set to ‘Do Not Disturb’, or your device volume is set to 0, the alarm won’t play properly. It will still show the notification without any sound. This is due to Apple’s restrictions as we are unable to access the app settings when the app is closed, only when it’s open or running in the background. SUBSCRIPTION IN ALARM CLOCK HD Upgrade to a Premium Membership and receive the following ongoing value: • Ad-Free • News & X feeds (Twitter) • Premium Customer Support Terms & Conditions: https://impalastudios.com/terms Privacy Policy: https://impalastudios.com/privacy >> WE LOVE FEEDBACK As always, we appreciate your feedback. Please email us at support@impalastudios.com with any suggestions or questions, our support team is ready and happy to help. WAKE UP YOUR WAY, EVERY DAY
World Clock
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.
- Global time checking
- Sunrise and sunset times
- Customizable city lists
- Watch face complications
- Time zone comparison
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With World Clock, you can quickly check the time in cities around the globe. Features: - Add cities of your choice to view the current, sunrise and sunset times - Quickly scroll through cities added to your list to see information about the city. - Add World Clock as a watch face complication to glance at the time in the city of your choice. - Easily compare times with a different time zone from your city list.
Screenshots
Verdict
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.
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. 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.
| Parameter | Alarm Clock HD | World Clock |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (104K ratings) — better | 4.4 (8 ratings) |
| Positive reviews | 31.6% of reviews | — |
| Number of ratings | 104K — better | 8 |
| Update frequency | Fortnightly — better | Every 6 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Free — better |
| Devices | iPhone, iPad | iPhone, iPod, Apple Watch — better |
| Requires iOS | 17.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 234 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Impala Studios | Apple |
Customer experience
Alarm Clock HD
World Clock
Bugs and requests
Alarm Clock HD
Reported bugs
4 issues- Alarm randomly snoozing itself
- Alarm not working when phone is muted
- Alarm sound not playing
- Alarm screen freezing/crashing
Requested features
4 requests- 24-hour clock option
- More alarm sounds/tones
- Ability to use own music files
- Do not disturb mode
World Clock
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Alarm Clock HD
- Premium member - 1 month$1.491 Month
- Premium Features - Weekly$1.997 Days
- Premium Features - Monthly3 Days trial$2.591 Month
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- Upgrade to Premium Features$5.496 Months
- Premium Yearly$9.991 Year
- Premium Yearly3 Days trial$11.991 Year
- Upgrade Your Alarm Clock3 Days trial$14.991 Year
- Premium yearly$19.991 Year
- Premium yearly3 Days trial$19.991 Year
- Premium yearly3 Days trial$24.991 Year
- Premium yearly3 Days trial$29.991 Year
World Clock
No in-app purchases
Questions
Is Alarm Clock HD free?
Is World Clock free?
Which has better reviews, Alarm Clock HD or World Clock?
Do Alarm Clock HD or World Clock have ads?
Which is updated more often, Alarm Clock HD or World Clock?
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