# One vs AClock

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.

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.

## The numbers

| Metric | One | AClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/one-tap-timer/id737441400/reviews)** | [4.5 (53 ratings)](https://appshunter.io/ios/app/aclock-pomodoro-and-timer/id1502827492/reviews) |
| Number of ratings | 4 | **53** |
| Positive reviews | **100.0% of reviews** | 89.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 23 months | **Every 2 months** |
| Monetization | **Free** | Ad-supported |
| Size | 1 MB | 9 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Oleksandr Prosin](https://appshunter.io/developer/1191609404) | [Zhengzhou Sibo Intelligent Technology Co., Ltd.](https://appshunter.io/developer/803144645) |

## What reviewers say

### One

[App page](https://appshunter.io/ios/app/one-tap-timer/id737441400)

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.

**Highlights:** One-tap timer start and toggle, Vivid and intuitive user interface, Ergonomic design and functionality, Convenient for everyday use

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### AClock

[App page](https://appshunter.io/ios/app/aclock-pomodoro-and-timer/id1502827492)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is One free?

One is free to download, with no in-app purchases.

### Is AClock free?

AClock is free to download, with no in-app purchases.

### Which has better reviews, One or AClock?

One is rated higher. One averages 5.0 out of 5 from 4 ratings, while AClock averages 4.5 from 53 ratings.

### Do One or AClock have ads?

AClock shows ads; One does not.

### Which is updated more often, One or AClock?

One ships an update every 23 months, and AClock every 2 months. Most recently, One was updated on September 10, 2026 and AClock on September 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*