# Kello vs Watch Tuner Lite

The clearest difference is price: Watch Tuner Lite at Free against Kello's $9.99. Watch Tuner Lite also leads on rating (3.2 vs 2.8) and review sentiment (57% vs 37%). Kello's advantage is iOS requirement (13.0 vs 15.6). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Watch Tuner Lite is free to download; Kello costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Watch Tuner Lite holds the better App Store score, 3.2 against 2.8. That said, the two scores are not equally well evidenced: Watch Tuner Lite has 38 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 37% of Kello's written reviews are positive against 57% of Watch Tuner Lite's.

Kello ships an update every 3 months, Watch Tuner Lite every 4 months. The most recent releases landed on October 18, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Kello | Watch Tuner Lite |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [2.8 (5 ratings)](https://appshunter.io/ios/app/kello/id380539253/reviews) | **[3.2 (38 ratings)](https://appshunter.io/ios/app/watch-tuner-lite/id968820626/reviews)** |
| Number of ratings | 5 | **38** |
| Positive reviews | 37.3% of reviews | **56.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 4 MB | 1 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Coldflower Design Corp.](https://appshunter.io/developer/380539256) | [Bartlomiej Swiatek](https://appshunter.io/developer/943509577) |

## What reviewers say

### Kello

[App page](https://appshunter.io/ios/app/kello/id380539253)

This app analyzes the accuracy of mechanical watches by listening to their ticking sounds through your device's microphone. It compares the watch's rhythm to the precise system clock to reveal timekeeping differences. Supports a wide range of watch frequencies and offers guidance on identifying mechanical timepieces.

**Highlights:** Microphone-based watch sound analysis, Comparison to iOS system clock, Automatic detection of 8 common watch frequencies, Guidance on identifying mechanical watches, Displays timekeeping differences

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 💡 Innovative watch timing solution at affordable price
- ✅ Accurate readings when properly configured
- 🎯 Correctly identifies beat frequency (BPH)
- ⚙️ Useful for watch regulation and adjustment
- 📱 Portable alternative to expensive timing machines

**What reviewers complain about**

- 🎙️ Highly sensitive to microphone quality and placement
- 🔇 Requires extremely quiet environment to function
- 📊 Inconsistent readings even in same position
- ⚠️ Frequent signal detection failures
- 🔄 High variability in results between measurements

**Reported bugs**

- App crashes on iPhone 5 and iOS 6
- Signal detection fails inconsistently
- Frequency auto-detection varies wildly on same watch
- Unstable signal readings despite strong initial signal
- App hangs on 'determine frequency' step

**Requested features**

- History log and data storage for watches
- Graphical representation of timing data over time
- Average readings over longer time periods
- Watch profile saving functionality
- Beat error measurement capability


### Watch Tuner Lite

[App page](https://appshunter.io/ios/app/watch-tuner-lite/id968820626)

This app measures the accuracy of mechanical and automatic watches by analyzing their audible ticks. It calculates the seconds-per-day deviation, helping you understand how fast or slow your timepiece is running. Ideal for watch enthusiasts who only need basic accuracy readings.

**Highlights:** Measures watch accuracy, Calculates seconds-per-day deviation, Uses device microphone, Works with ticking watches/clocks, Simple, focused interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kello free?

Kello costs $9.99, with no in-app purchases.

### Is Watch Tuner Lite free?

Watch Tuner Lite is free to download, with no in-app purchases.

### Which has better reviews, Kello or Watch Tuner Lite?

Watch Tuner Lite is rated higher. Kello averages 2.8 out of 5 from 5 ratings, while Watch Tuner Lite averages 3.2 from 38 ratings.

### Do Kello or Watch Tuner Lite have ads?

Neither Kello nor Watch Tuner Lite shows ads.

### Which is updated more often, Kello or Watch Tuner Lite?

Kello ships an update every 3 months, and Watch Tuner Lite every 4 months. Most recently, Kello was updated on October 18, 2026 and Watch Tuner Lite on October 17, 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.*