Atomic Clock PRO vs Good Time
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Atomic Clock PRO
This app provides highly accurate time by syncing with official atomic clock servers. Customize your display with digital or analog views, personal backgrounds, and adjustable sizes. It's perfect for precise timekeeping, travel, or as a personalized desk clock.
- Atomic clock time synchronization
- Digital and analog display options
- Customizable backgrounds
- Adjustable clock size
- Automatic time zone recognition
- Screen always on option
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Get accurate time on your iPhone and iPad by syncing with an official atomic clock time server. Download now for free! If you want exact time, a precise time reference, or an easy-to-read clock display, this app is designed for that. It automatically recognizes your time zone, lets you use one of your own photos as the background, and lets you switch between a digital display and a classic analog clock with a simple swipe. It is ideal as a personalized desk clock, a reliable travel companion, an everyday reference clock, or when you need exact time to set a mechanical watch accurately. Overview: - Accurate and precise time synced from an official atomic clock time server - Automatically recognizes your time zone and shows the current local time - Choose digital, analog, or combined analog and digital clock displays - Swipe to switch between clock displays - Resize the digital clock for a larger or smaller display - Includes time (hours, minutes, and seconds), date, and day of the week (optional) - Optional sound every second or every minute - Change clock and background colors - Use your own photos as background images - Choose atomic clock sync or your device's system clock - Option to keep the screen awake while the app is open - Works in portrait and landscape mode - For iPhone and iPad Helpful for: - A personalized desk clock at home or at work - Getting the correct local time while traveling - Setting a mechanical watch accurately - A clear reference clock when you want accurate, easy-to-read time PLEASE NOTE: You can switch between the analog and digital clock by swiping left or right across the clock. Disclaimer: Please note that whilst all reasonable care has been taken to make this application as accurate as possible we can not guarantee 100% accuracy. Standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Good Time
Precisely set your mechanical watch to the exact second using an analog dial with a sub-second-accurate sweep hand. Features include a stopwatch controllable by volume buttons, world time for over 2,000 cities, and multiple dial designs. It operates entirely on-device with no ads or tracking.
- Sub-second accurate sweep hand
- Volume button stopwatch control
- World time with GMT offset
- Multiple dial designs
- On-device operation
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I made Good Time because I wanted a clock that actually helps you set a mechanical watch — one where you can see exactly when the second hand hits 12, down to a fraction of a second. • DIALS: Swipe through a variety of dials — field, dive, dress, chronograph, moonphase, etc. Light and dark versions. • CHRONOGRAPH: There's a stopwatch built in. You can run it with your volume buttons — up starts/pauses, down resets. • WORLD TIME: Search for a city and see what time it is there • 100% FREE: No in-app purchases, no subscriptions, no ads, and I'm not planning to add any. I'm not trying to make money off this — I just wanted it to exist. Made for the Grey Nato crew. If you have a request for new dials, let me know in a review.
Screenshots
Verdict
The clearest difference is in-app purchases: Good Time at none against Atomic Clock PRO's 2. Good Time also leads on ads (none vs shown) and update cadence (every 3 days vs every 4 months). Atomic Clock PRO's advantage is ratings volume (10K vs 12) and device support (3 vs 1). On price 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. Atomic Clock PRO sells 2 in-app purchases, starting at $1.99 per month. Good Time asks for nothing beyond the download.
Good Time holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Atomic Clock PRO has 10K ratings behind it against 12, so its average is the more settled of the two.
Atomic Clock PRO ships an update every 4 months, Good Time every 3 days. The most recent releases landed on November 11, 2026 and November 5, 2026 respectively.
| Parameter | Atomic Clock PRO | Good Time |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (10K ratings) | 5.0 (12 ratings) — better |
| Positive reviews | 72.9% of reviews | — |
| Number of ratings | 10K — better | 12 |
| Update frequency | Every 4 months | Every 3 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 18.5 |
| Further details — not scored | ||
| Size | 6 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Brachmann Online Marketing GmbH & Co. KG | Jonathan Cho |
Customer experience
Atomic Clock PRO
Good Time
Bugs and requests
Atomic Clock PRO
Reported bugs
3 issues- Second hand occasionally runs in reverse
- Digital clock display cuts off on some devices
- Inconsistent behavior when switching between clock types
Requested features
3 requests- Customizable clock face options
- Ability to set widget on home screen
- Sync with system clock to automatically update time
Good Time
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Atomic Clock PRO
- Premium$1.991 Month
- Remove Ads$5.99
Good Time
No in-app purchases









