# RoboTone. vs Kid's Card Calc

The clearest difference is price: RoboTone. at Free against Kid's Card Calc's $1.99. RoboTone. also leads on in-app purchases (none vs 3). Kid's Card Calc's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 4 months). On device support and iOS requirement there is nothing between them.

RoboTone. is free to download; Kid's Card Calc costs $1.99 up front. Kid's Card Calc sells 3 in-app purchases, starting at $1.99 per month. RoboTone. asks for nothing beyond the download.

RoboTone. ships an update every 4 months, Kid's Card Calc every 3 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | RoboTone. | Kid's Card Calc |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| 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** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Ad-supported | — |
| Size | 64 MB | 39 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MASAHIRO MIZUTANI](https://appshunter.io/developer/368158224) | [sheeplab LLC](https://appshunter.io/developer/1802534863) |

## 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


### Kid's Card Calc

[App page](https://appshunter.io/ios/app/kids-card-calc/id6743380554)

**Features:** macOS Compatibility, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan (Monthly) | $1.99 | per month |
| Premium Plan (Annual) | $5.99 | per year |
| Premium Plan | $0.99 | one-time |


## Frequently asked questions

### Is RoboTone. free?

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

### Is Kid's Card Calc free?

Kid's Card Calc costs $1.99, and also offers in-app purchases.

### Do RoboTone. or Kid's Card Calc have ads?

RoboTone. shows ads; Kid's Card Calc does not.

### Which is updated more often, RoboTone. or Kid's Card Calc?

RoboTone. ships an update every 4 months, and Kid's Card Calc every 3 weeks. Most recently, RoboTone. was updated on November 1, 2026 and Kid's Card Calc on October 30, 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.*