# RoboTone. vs Primo

The clearest difference is review sentiment: Primo at 50% against RoboTone.'s 0%. Primo also leads on ads (none vs shown) and update cadence (monthly vs every 4 months). RoboTone.'s advantage is in-app purchases (none vs 10). On price and device support there is nothing between them.

Both are free to download. Primo sells 9 in-app purchases, starting at $3.49 per month. RoboTone. asks for nothing beyond the download.

RoboTone. ships an update every 4 months, Primo monthly. The most recent releases landed on September 17, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | RoboTone. | Primo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/robotone/id560491646/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 64 MB | 258 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MASAHIRO MIZUTANI](https://appshunter.io/developer/368158224) | [INTERNATIONAL LABORATORY OF MUSIC EDUCATION](https://appshunter.io/developer/1493879437) |

## What reviewers say

### RoboTone.

[App page](https://appshunter.io/ios/app/robotone/id560491646)

This app helps children develop absolute listening skills through interactive musical challenges. Players learn to identify tones by playing a virtual piano and then compete against a "robo" by selecting the correct notes. Settings allow customization of tones and instruments.

**Highlights:** Absolute listening skill development, Interactive musical challenges, Virtual piano gameplay, Tone identification battles, Customizable tones and instruments

**Features:** Vision Pro support

**In-app purchases:** none


### Primo

[App page](https://appshunter.io/ios/app/primo/id1493879438)

This app offers dailyソルフェージュ exercises to build fundamental music skills like reading sheet music, identifying pitches by ear, and understanding rhythm. It aims to make music education accessible and affordable for everyone, regardless of location or prior experience.

**Highlights:** Sheet music reading practice, Ear training exercises, Rhythm and timing drills, Sight-reading simulations, Music history and appreciation content, Specialized theory problem collections

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 読譜（どくふ） | $3.49 | per month |
| 初見（しょけん） | $3.49 | per month |
| リズム | $3.49 | per month |
| 聴音（ちょうおん） | $3.49 | per month |
| まとめ買い | $13.99 | per month |
| シュトラウス | $0.99 | one-time |
| 山田耕筰 | $0.99 | one-time |
| ドビュッシー | $0.99 | one-time |
| シベリウス | $0.99 | one-time |


## Frequently asked questions

### Is RoboTone. free?

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

### Is Primo free?

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

### Do RoboTone. or Primo have ads?

RoboTone. shows ads; Primo does not.

### Which is updated more often, RoboTone. or Primo?

RoboTone. ships an update every 4 months, and Primo monthly. Most recently, RoboTone. was updated on September 17, 2026 and Primo on June 1, 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.*