One vs AClock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
One
A straightforward countdown timer for iPhone designed for ease of use. Its intuitive interface allows you to start and manage timers with a single tap, making it a convenient tool for daily tasks. The app focuses on essential functionality without unnecessary complexity.
- One-tap timer start and toggle
- Vivid and intuitive user interface
- Ergonomic design and functionality
- Convenient for everyday use
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One-Tap Timer (tm) is a simple yet very convenient countdown timer app for your iPhone. It features a vivid and intuitive user interface with not more than just sufficient functionality. * Start and toggle your timer with just one tap. * Take advantage of our ergonomic design and functionality. * Use One-Tap Timer in your everyday life. Tip for Mac users: keep app icon in Dock.
AClock
This minimalist clock app offers a variety of display styles, including page-turning and classic digital. It includes a stopwatch, countdown timer, and Pomodoro timer, with customizable colors, fonts, and motivational slogans. The app also features a night mode for eye protection and is designed for extreme power saving.
- Page turning and classic digital clock displays
- Built-in stopwatch and countdown timer
- Pomodoro timer functionality
- Countdown to specific dates
- Customizable font, color, and background
- Night mode for eye protection
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AClock is a fully functional, minimalist design, extreme power saving, lightweight and efficient clock app. special function: 1. Switch between page turning clock and classic digital clock as you like 2. Built-in convenient stopwatch, countdown, Pomodoro 3. Display of countdown days and anniversaries to create your own personalized clock 4. Customize the font color and size, and customize the background color 5. Customize your inspirational slogan to encourage your dedicated self~ 6. Date, second, motivational slogan, custom display 7. Support night mode, more eye protection 8. Support 12-hour system and 24-hour system 9. Extremely power saving, all-round optimization, escort the power 10. Countdown to the exam
Screenshots
Verdict
The clearest difference is rating: One at 5.0 against AClock's 4.5. One also leads on ads (none vs shown) and monetization model (free vs ad-supported). AClock's advantage is update cadence (every 2 months vs every 23 months) and ratings volume (53 vs 4). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
One holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: AClock has 53 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of One's written reviews are positive against 89% of AClock's.
One ships an update every 23 months, AClock every 2 months. The most recent releases landed on September 10, 2026 and September 29, 2026 respectively.
| Parameter | One | AClock |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | 4.5 (53 ratings) |
| Positive reviews | 100.0% of reviews — better | 89.3% of reviews |
| Number of ratings | 4 | 53 — better |
| Update frequency | Every 23 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Oleksandr Prosin | Zhengzhou Sibo Intelligent Technology Co., Ltd. |
Customer experience
One
AClock
In-app purchases
One
No in-app purchases
AClock
No in-app purchases
