# KANTAN Chord vs 4trMTR

The clearest difference is review sentiment: 4trMTR at 100% against KANTAN Chord's 40%. 4trMTR also leads on update cadence (every 3 weeks vs every 2 months). KANTAN Chord's advantage is price (Free vs $1.99) and device support (4 vs 2). On ads and in-app purchases there is nothing between them.

KANTAN Chord is free to download; 4trMTR costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

KANTAN Chord ships an update every 2 months, 4trMTR every 3 weeks. Both last shipped on November 12, 2026.

## The numbers

| Metric | KANTAN Chord | 4trMTR |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | 40.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | **Free** | Paid |
| Size | 1 MB | 12 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [InstaChord Corp.](https://appshunter.io/developer/1579397634) | [YUKIO TOKIWA](https://appshunter.io/developer/6776055556) |

## What reviewers say

### KANTAN Chord

[App page](https://appshunter.io/ios/app/kantan-chord/id1615447247)

This browser extension converts song chords from various websites into numerical "degrees" or Nashville Numbers. It automatically analyzes the song's key and allows users to transpose chords to different formats like Roman numerals or simple numbers.

**Highlights:** Converts chords to Nashville Numbers, Displays chords as Roman numerals, Automatic key analysis, Adjustable analysis sensitivity, Supports multiple chord websites, Transpose chords to different keys

**Features:** Safari Extension, Vision Pro support

**In-app purchases:** none


### 4trMTR

[App page](https://appshunter.io/ios/app/4trmtr/id6776449627)

Transform your iPhone into a straightforward multi-track recorder for music creation. Easily layer guitar, vocals, bass, and more, one track at a time. Perfect for capturing song ideas or creating band demos without complex software.

**Highlights:** 4-track multi-track recording, Punch-in re-recording, Selectable audio input, Project saving and management, Simple, immediate recording interface

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

**In-app purchases:** none


## Frequently asked questions

### Is KANTAN Chord free?

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

### Is 4trMTR free?

4trMTR costs $1.99, with no in-app purchases.

### Do KANTAN Chord or 4trMTR have ads?

Neither KANTAN Chord nor 4trMTR shows ads.

### Which is updated more often, KANTAN Chord or 4trMTR?

KANTAN Chord ships an update every 2 months, and 4trMTR every 3 weeks. Most recently, KANTAN Chord was updated on November 12, 2026 and 4trMTR on November 12, 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.*