Atomic Clock (Gorgy Timing) vs Alarm Clock HD
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Atomic Clock (Gorgy Timing)
This app provides ultra-precise time by syncing with atomic time servers. It features a customizable display mimicking professional studio clocks, with advanced alarm functions and various visual themes. Designed for accuracy and usability, it's ideal for professionals and enthusiasts alike.
- Syncs with atomic time servers
- Professional studio clock display
- Customizable alarm with snooze
- Local time / UTC mode
- Multiple color themes
- Night mode for dimming
- Disabled screen auto-lock
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This tool shows you the ultimate precise time of day. To achieve this, it uses a special internet time protocol to fetch the time from an atomic time server. We are proud to offer version 5 of the Gorgy Timing Atomic Clock. The program is one of the classic applications since the early days of the Apple App Store and has been continually improved based on user feedback. The Gorgy Timing Atomic Clock shows the precise time of day. To achieve this, it uses a special internet time protocol to fetch the ultimate precise time from cesium atomic clocks available on the internet, or any other time server you like. The graphical display mimics the clock display of the legendary Gorgy Timing clocks, which are used in professional radio and television studios, and we spent much effort to bring the original feeling of these wickedly expensive clocks to your iPhone. This app is used by BBC studios, astronomers, concert promoters, etc. Version 5 contains the following functions: * Universal support for all iPhone, iPad and iPod touch devices running iOS 15, iPadOS 15, watchOS 9 or higher * Optimized for the latest iOS, iPadOS and watchOS, full 64 bit support * Alarm function with snooze (touch anywhere on the screen), volume fade-in, based on weekdays * Alarm time based on seconds (not minutes) * Local time / UTC time mode * Alarm notification window instead of normal alarm sound, if app is not running or in the background * Use playlists or a manual picker selection from your own music library as alarm sounds * The alarm sound is also playing when the device is muted, or the display is switched off, and also works in AirPlay environments * Customizable time server sources * Colors: green, red, blue, yellow, white, dark green, violet, pink, orange, turquoise and hidden, with a separate color option for digits, seconds and segments * Alternative visual display of fractional seconds (1/60th sec. resolution) * 12/24 hours display * Optional second tick sound * Full landscape support (including settings dialog) * Touching the display lets the buttons and status bar fade out * Touching the display again will add the current date (in all orientations) * Disabled screen auto-lock * Options "sync at startup", "hourly", "daily", or a sync button for manual syncing * The last known time delta is used when started without sync * "Night mode", which dims the display using a slider, shows the seconds with only one dot (to prevent a hard brightness switch between second 59 and second 0), switches off the tick sound, and reduces screen updates to save battery * To minimize burn-in effects (especially on the iPhone X OLED display), the clock is doing micro movements when running longer than 5 minutes * VoiceOver support Answers to common questions: * An application can not set your device's system time, so a time sync between the atomic time and the device time is not possible. * If you want to wakeup with music, please do not exit the app before going to sleep (which would result in a local notification dialog without music in the morning), and do not lock your device. Be aware that running an application all the time, even without display, consumes battery, so please make sure that your iPhone is fully charged before you go to bed, connect it to your charger, or use the app's Night mode, which is much more energy-saving.
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
Screenshots
Verdict
The clearest difference is review sentiment: Atomic Clock (Gorgy Timing) at 91% against Alarm Clock HD's 32%. Atomic Clock (Gorgy Timing) also leads on ads (none vs shown) and rating (4.8 vs 4.5). Alarm Clock HD's advantage is price (Free vs $1.99) and update cadence (fortnightly vs every 4 months). On in-app purchases and monetization model 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
Alarm Clock HD is free to download; Atomic Clock (Gorgy Timing) costs $1.99 up front. Atomic Clock (Gorgy Timing) sells 5 one-off in-app purchases and Alarm Clock HD sells 10 in-app purchases, starting at $1.49 per month. Whichever you choose, the download price is not the number that matters.
Atomic Clock (Gorgy Timing) 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 5K, so its average is the more settled of the two. Written reviews point the same way: 91% of Atomic Clock (Gorgy Timing)'s written reviews are positive against 32% of Alarm Clock HD's.
Atomic Clock (Gorgy Timing) ships an update every 4 months, Alarm Clock HD fortnightly. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.
| Parameter | Atomic Clock (Gorgy Timing) | Alarm Clock HD |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.8 (5K ratings) — better | 4.5 (104K ratings) |
| Positive reviews | 90.5% of reviews — better | 32.0% of reviews |
| Number of ratings | 5K | 104K — better |
| Update frequency | Every 4 months | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 15 MB | 230 MB |
| Age rating | 4+ | 4+ |
| Developer | CompuLab, Markus Gömmel | Impala Studios |
Customer experience
Atomic Clock (Gorgy Timing)
Alarm Clock HD
Bugs and requests
Atomic Clock (Gorgy Timing)
Not enough reviews yet to summarise bugs or 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
In-app purchases
Atomic Clock (Gorgy Timing)
- Nice job$0.99
- Good work.$2.99
- Great app!$3.99
Show 2 moreShow fewer
- Awesome idea!$8.99
- I totally love it!$17.99
Alarm Clock HD
- Premium member - 1 month$1.491 Month
- Premium Features - Weekly$1.997 Days
- Premium Features - Monthly3 Days trial$2.591 Month
Show 7 moreShow fewer
- 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
Questions
Is Atomic Clock (Gorgy Timing) free?
Is Alarm Clock HD free?
Which has better reviews, Atomic Clock (Gorgy Timing) or Alarm Clock HD?
Do Atomic Clock (Gorgy Timing) or Alarm Clock HD have ads?
Which is updated more often, Atomic Clock (Gorgy Timing) or Alarm Clock HD?
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