Comparison

Alarm Clock HD vs SClock

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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

About

SClock

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
Read full description

・ 24H / 12H calendar Simple clock function with color selectable ・The sound before the start, the countdown sound, the color display can be changed according to the remaining time, and the two timers can be switched, making it ideal for pomodoro timers, etc.The sound before the start, the countdown sound, the color display can be changed according to the remaining time, and the two timers can be switched, making it ideal for pomodoro timers, etc. ・By switching between large format and middle size display, it is easy to use at hand and has excellent visibility from a distance in a wide place. ・Simple and easy-to-read design. You can use it in any situation such as studying, meetings, presentations, sports, fitness, cooking, etc.

Screenshots

Alarm Clock HD4 screens
SClock4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on September 25, 2026 and September 8, 2026 respectively.

Scorecard3 real differences · 7 level
Alarm Clock HD versus SClock: the parameters behind the verdict, then further details
ParameterAlarm Clock HDSClock
PriceFreeFree
Rating4.5 (104K ratings) — better4.3 (24 ratings)
Positive reviews32.0% of reviews50.0% of reviews — better
Number of ratings104K — better24
Update frequencyFortnightlyFortnightly
AdsYesYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.616.1 — better
Further details — not scored
Size230 MB30 MB
Age rating4+4+
DeveloperImpala StudiosHajime Suzuki

Customer experience

Alarm Clock HD

All ratings104,102 ratings
Positive88.4%
Neutral4.7%
Negative6.9%
Written reviews908 reviews
Positive32.0%
Neutral8.3%
Negative59.7%

SClock

All ratings24 ratings
Positive83.3%
Neutral4.2%
Negative12.5%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

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

SClock

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Alarm Clock HD

Subscriptions10
  • Premium member - 1 month$1.491 Month
  • Premium Features - Weekly$1.997 Days
  • Premium Features - Monthly3 Days trial$2.591 Month
Show 7 more
  • Upgrade to Premium Features$5.496 Months
  • Premium Yearly3 Days trial$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
1 purchases

SClock

Subscriptions1
  • premium$0.991 Month

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 25, 2026 and SClock on September 8, 2026.

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