# SailBot vs AtomicClock

The clearest difference is in-app purchases: SailBot at none against AtomicClock's 1. SailBot also leads on ads (none vs shown) and review sentiment (100% vs 84%). AtomicClock's advantage is update cadence (every 3 weeks vs every 8 months) and ratings volume (5.5K vs 5). On price and device support there is nothing between them.

Both are free to download. AtomicClock sells 1 one-off in-app purchase. SailBot asks for nothing beyond the download.

AtomicClock holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: AtomicClock has 5.5K ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 100% of SailBot's written reviews are positive against 84% of AtomicClock's, so the app with the better star average is not the one people write more warmly about.

SailBot ships an update every 8 months, AtomicClock every 3 weeks. The most recent releases landed on September 29, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | SailBot | AtomicClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (5 ratings)](https://appshunter.io/ios/app/sailbot/id891801574/reviews) | **[4.8 (5.5K ratings)](https://appshunter.io/ios/app/atomicclock-ntp-time/id1402993049/reviews)** |
| Number of ratings | 5 | **5.5K** |
| Positive reviews | **100.0% of reviews** | 84.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 22 MB | 17 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Slope LLC](https://appshunter.io/developer/891801577) | [Timo Partl](https://appshunter.io/developer/1387413672) |

## What reviewers say

### SailBot

[App page](https://appshunter.io/ios/app/sailbot/id891801574)

Automate sailing race starting signals with this advanced air horn system. Connect via Bluetooth to your iOS device to manage custom start sequences, choose from pre-set ISAF options, or create your own. Ideal for sailing schools, yacht clubs, and race committees seeking a portable and reliable solution.

**Highlights:** Bluetooth connectivity, Automated starting sequences, Customizable start sequence editing, Pre-set ISAF starting sequences, Portable and durable construction, iOS app control

**Features:** macOS Compatibility

**In-app purchases:** none


### AtomicClock

[App page](https://appshunter.io/ios/app/atomicclock-ntp-time/id1402993049)

This app displays the exact current time synchronized with NTP servers, offering a customizable clock view for precise time checks. It's ideal for setting watches, verifying timestamps, or comparing local and network time.

**Highlights:** Precise time from NTP servers, Customizable clock faces, Select or add time servers, Local and UTC views, 12/24 hour modes, Customizable time format, Acoustic ticking

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro Version | $6.99 | one-time |

**What reviewers like**

- 🚀 Accurate time
- 👍 Highly customizable
- 🚀 Precise to the second
- 👍 Easy to use
- 👍 Helpful for setting watches

**What reviewers complain about**

- 🐛 Server connection issues
- 🔍 Limited time zone options
- 💰 Ads diminish clock view
- 🔍 Lacks some advanced features
- 🔍 Redundant for some users

**Reported bugs**

- Crashes on certain iOS versions
- Occasional freezing of hands
- Countdown timer sound not working

**Requested features**

- Add GMT/dual time display
- Implement widget support
- Add different second hand sounds
- Allow setting background color to match watch
- Include alarm/timer functionality


## Frequently asked questions

### Is SailBot free?

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

### Is AtomicClock free?

AtomicClock is free to download, with in-app purchases available.

### Which has better reviews, SailBot or AtomicClock?

AtomicClock is rated higher. SailBot averages 4.6 out of 5 from 5 ratings, while AtomicClock averages 4.8 from 5.5K ratings.

### Do SailBot or AtomicClock have ads?

AtomicClock shows ads; SailBot does not.

### Which is updated more often, SailBot or AtomicClock?

SailBot ships an update every 8 months, and AtomicClock every 3 weeks. Most recently, SailBot was updated on September 29, 2026 and AtomicClock on October 12, 2026.

---

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