Comparison

Alarm Clock HD vs When

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

When

This app offers a minimalist flip clock experience with customizable widgets. It features a full-screen display with classic page-turning animations and adjustable brightness. Personalize your time display with options for seconds, date, and week.

Highlights
  • Full-screen classic flip animation
  • Minimalist design style
  • Customizable time display (seconds, date, week)
  • 12/24 hour mode switching
  • Adjustable screen brightness
  • Multiple widget options (Flip Clock, Digital Clock, Calendar, Progress Bar, Disc Clock)
Features
Read full description

It is a must-have personalized posing artifact for hipsters, a must-have tool for exam preparation and study, and hard work. Eye-catching digital digital watch display, convenient for your living room, any angle of the work desk to watch the time. Full screen flip, clock display more prominent, no matter where you put it, it is a beautiful scenery. Widgets: - Flip Clock Widget - Digital Clock Widget - Friday Calendar Widget - Progress Bar Widget - Disc Clock Widget Special Features. 1, full-screen classic page animation, minimalist design style 2、Free control of the display of time: seconds, date, week is free to control the display of hidden 3, 12 and 24 hours mode switching 4, left and right slide the clock screen, adjust the brightness of the screen

Screenshots

Alarm Clock HD4 screens
When4 screens

Verdict

The call

The clearest difference is review sentiment: When at 90% against Alarm Clock HD's 32%. When also leads on in-app purchases (none vs 11) and rating (4.7 vs 4.5). Alarm Clock HD's advantage is ratings volume (104K vs 28). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

When holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Alarm Clock HD has 104K ratings behind it against 28, 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 90% of When's.

UpkeepUpdate frequency

Alarm Clock HD ships an update fortnightly, When weekly. The most recent releases landed on October 20, 2026 and October 18, 2026 respectively.

Scorecard7 real differences · 3 level
Alarm Clock HD versus When: the parameters behind the verdict, then further details
ParameterAlarm Clock HDWhen
PriceFreeFree
Rating4.5 (104K ratings)4.7 (28 ratings) — better
Positive reviews31.7% of reviews90.0% of reviews — better
Number of ratings104K — better28
Update frequencyFortnightlyWeekly — better
AdsYesYes
In-app purchasesYesNo — better
MonetizationFreemiumAd-supported — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.610.0 — better
Further details — not scored
Size234 MB73 MB
Age rating4+4+
DeveloperImpala Studios磊 岑

Customer experience

Alarm Clock HD

All ratings104,303 ratings
Positive88.4%
Neutral4.7%
Negative6.9%
Written reviews928 reviews
Positive31.7%
Neutral8.2%
Negative60.1%

When

All ratings28 ratings
Positive92.9%
Neutral7.1%
Negative0.0%
Written reviews20 reviews
Positive90.0%
Neutral5.0%
Negative5.0%

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

When

Not enough reviews yet to summarise bugs or requests.

In-app purchases

11 purchases

Alarm Clock HD

Subscriptions11
  • Premium member - 1 month$1.491 Month
  • Premium Features - Weekly$1.997 Days
  • Premium Features - Monthly3 Days trial$2.591 Month
Show 8 more
  • 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
None

When

No in-app purchases

Questions

Is Alarm Clock HD free?
Alarm Clock HD is free to download, with in-app purchases available.
Is When free?
When is free to download, with no in-app purchases.
Which has better reviews, Alarm Clock HD or When?
When is rated higher. Alarm Clock HD averages 4.5 out of 5 from 104K ratings, while When averages 4.7 from 28 ratings.
Do Alarm Clock HD or When have ads?
Both Alarm Clock HD and When show ads.
Which is updated more often, Alarm Clock HD or When?
Alarm Clock HD ships an update fortnightly, and When weekly. Most recently, Alarm Clock HD was updated on October 20, 2026 and When on October 18, 2026.

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