# AllGoRhythmics vs IDOUDO

The clearest difference is update cadence: AllGoRhythmics at every 9 days against IDOUDO's every 5 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AllGoRhythmics sells 1 one-off in-app purchase and IDOUDO sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

AllGoRhythmics ships an update every 9 days, IDOUDO every 5 weeks. Both last shipped on October 7, 2026.

## The numbers

| Metric | AllGoRhythmics | IDOUDO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 5 weeks |
| Size | 7 MB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [PUJA MUZIK PRODUKSIYON ORGANIZASYON TURIZM TICARET LIMITED SIRKETI](https://appshunter.io/developer/1882517446) | [Kosuke Mawatari](https://appshunter.io/developer/1489564137) |

## What reviewers say

### AllGoRhythmics

[App page](https://appshunter.io/ios/app/allgorhythmics/id6767700195)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AllGoRhythmics Pro | $3.99 | one-time |


### 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 AllGoRhythmics free?

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

### Is IDOUDO free?

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

### Do AllGoRhythmics or IDOUDO have ads?

Neither AllGoRhythmics nor IDOUDO shows ads.

### Which is updated more often, AllGoRhythmics or IDOUDO?

AllGoRhythmics ships an update every 9 days, and IDOUDO every 5 weeks. Most recently, AllGoRhythmics was updated on October 7, 2026 and IDOUDO on October 7, 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.*