# Extrack vs IDOUDO

Extrack and IDOUDO are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Extrack sells 2 in-app purchases, starting at $5.99 per month and IDOUDO sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Extrack | IDOUDO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (24 ratings)](https://appshunter.io/ios/app/extrack-stem-separatorchord/id6504546276/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 36.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | — |
| Monetization | Freemium | — |
| Size | 604 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yamaha Corporation](https://appshunter.io/developer/353469356) | [Kosuke Mawatari](https://appshunter.io/developer/1489564137) |

## What reviewers say

### Extrack

[App page](https://appshunter.io/ios/app/extrack-stem-separatorchord/id6504546276)

Instantly split songs into individual instrument parts and analyze chords in real-time. Adjust volumes, practice "minus one" style, and visualize chord fingerings for guitar or piano. Perfect for musicians of all levels looking to jam along with their favorite tracks.

**Highlights:** Instrumental stem separation, Real-time chord analysis, Adjustable instrument volumes, Practice 'minus one' mode, Visual chord fingering guides, Tempo and key adjustment, Section looping

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $5.99 | per month |
| Yearly Plan | $39.99 | per year |


### IDOUDO

[App page](https://appshunter.io/ios/app/idoudo-movable-do-solfege/id6804583806)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Keys: 1 Note | $1.99 | one-time |
| Unlock All Keys: 2 Notes | $1.99 | one-time |
| Unlock All Keys: 1 Triad | $1.99 | one-time |
| Unlock Keys: 1 Seventh Chord | $1.99 | one-time |


## Frequently asked questions

### Is Extrack free?

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

### Is IDOUDO free?

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

### Do Extrack or IDOUDO have ads?

Neither Extrack nor IDOUDO 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.*