# ToneDetector vs K

The clearest difference is update cadence: K at every 3 months against ToneDetector's every 29 months. K also leads on price ($3.99 vs $9.99) and iOS requirement (11.0 vs 14.0). On ads, in-app purchases and device support there is nothing between them.

ToneDetector costs $9.99 and K $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ToneDetector ships an update every 29 months, K every 3 months. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | ToneDetector | K |
| --- | --- | --- |
| Price | $9.99 | **$3.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tonedetector/id495002820/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 28 MB | 112 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jian Cheng](https://appshunter.io/developer/495002823) | [Jongyun Park](https://appshunter.io/developer/382617671) |

## What reviewers say

### ToneDetector

[App page](https://appshunter.io/ios/app/tonedetector/id495002820)

Master Mandarin tones with this intuitive app. Practice pronunciation, compare your pitch contours to samples, and receive immediate visual feedback to improve your speaking accuracy without a tutor. Covers all Mandarin tonal syllables for effective self-assessment.

**Highlights:** Instant tone judgment, Visual pitch contour comparison, Practice all Mandarin tonal syllables, Self-assessment of tone perception, Sample sounds for comparison, Intuitive practice interface

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

**In-app purchases:** none


### K

[App page](https://appshunter.io/ios/app/k/id1595257097)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ToneDetector free?

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

### Is K free?

K costs $3.99, with no in-app purchases.

### Do ToneDetector or K have ads?

Neither ToneDetector nor K shows ads.

### Which is updated more often, ToneDetector or K?

ToneDetector ships an update every 29 months, and K every 3 months. Most recently, ToneDetector was updated on October 6, 2026 and K on October 3, 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.*