# Kello vs Tabata Timer Fit RPG

The clearest difference is price: Tabata Timer Fit RPG at Free against Kello's $9.99. Kello's advantage is iOS requirement (13.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

Tabata Timer Fit RPG is free to download; Kello costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Kello | Tabata Timer Fit RPG |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[2.8 (5 ratings)](https://appshunter.io/ios/app/kello/id380539253/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 37.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free | — |
| Size | 4 MB | 2 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Coldflower Design Corp.](https://appshunter.io/developer/380539256) | [Nikhil Kumar](https://appshunter.io/developer/1783391273) |

## 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


### Tabata Timer Fit RPG

[App page](https://appshunter.io/ios/app/tabata-timer-fit-rpg/id6751505771)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kello free?

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

### Is Tabata Timer Fit RPG free?

Tabata Timer Fit RPG is free to download, with no in-app purchases.

### Do Kello or Tabata Timer Fit RPG have ads?

Neither Kello nor Tabata Timer Fit RPG shows ads.

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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.*