# RoboTone. vs LD

The clearest difference is ads: LD at none against RoboTone.'s shown. RoboTone.'s advantage is device support (3 vs 1). On price, update cadence, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | RoboTone. | LD |
| --- | --- | --- |
| 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 | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Ad-supported | — |
| Size | 64 MB | 255 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [MASAHIRO MIZUTANI](https://appshunter.io/developer/368158224) | [一般社団法人 日本LD学会](https://appshunter.io/developer/1373157749) |

## 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


### LD

[App page](https://appshunter.io/ios/app/ld-skaip/id1375372760)

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

**In-app purchases:** none


## Frequently asked questions

### Is RoboTone. free?

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

### Is LD free?

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

### Do RoboTone. or LD have ads?

RoboTone. shows ads; LD does not.

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

RoboTone. ships an update every 4 months, and LD every 4 months. Most recently, RoboTone. was updated on September 17, 2026 and LD on September 10, 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.*