# Mathematical Playground vs いつでもMyiD

The clearest difference is price: いつでもMyiD at Free against Mathematical Playground's $1.99. いつでもMyiD also leads on iOS requirement (13.0 vs 17.6). Mathematical Playground's advantage is review sentiment (22% vs 0%). On update cadence, ads, in-app purchases and device support there is nothing between them.

いつでもMyiD is free to download; Mathematical Playground costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mathematical Playground ships an update every 2 months, いつでもMyiD every 4 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Mathematical Playground | いつでもMyiD |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | **22.2% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Paid | **Free** |
| Size | 96 MB | 34 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jun Nakashima](https://appshunter.io/developer/1130820204) | [JSS Co., Ltd.](https://appshunter.io/developer/1097023124) |

## What reviewers say

### Mathematical Playground

[App page](https://appshunter.io/ios/app/mathematical-playground/id1180400849)

An educational tool for learning and teaching about 3D mathematical shapes. It offers features like measuring dimensions, cutting shapes, and coloring, making complex geometry accessible for students and educators.

**Highlights:** Measure length, area, distance, angles, and volume, Cut shapes along a specified plane, Expand shapes face by face, Color and highlight shapes, Handwriting and screenshot tools, Share shape data wirelessly

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

**In-app purchases:** none


### いつでもMyiD

[App page](https://appshunter.io/ios/app/myid/id1488435416)

This app facilitates the sending and receiving of information for a digital identity verification service. It prioritizes iPhone usability for convenient access to information and safety confirmation, especially during emergencies. Requires organizational permission and a password to use.

**Highlights:** Digital identity information exchange, iPhone-optimized user experience, Emergency safety confirmation, Push notifications for organizational contacts, Multi-factor authentication for initial registration

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

**In-app purchases:** none


## Frequently asked questions

### Is Mathematical Playground free?

Mathematical Playground costs $1.99, with no in-app purchases.

### Is いつでもMyiD free?

いつでもMyiD is free to download, with no in-app purchases.

### Do Mathematical Playground or いつでもMyiD have ads?

Neither Mathematical Playground nor いつでもMyiD shows ads.

### Which is updated more often, Mathematical Playground or いつでもMyiD?

Mathematical Playground ships an update every 2 months, and いつでもMyiD every 4 months. Most recently, Mathematical Playground was updated on November 2, 2026 and いつでもMyiD on November 3, 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.*