# Mental Math vs 認定看護管理者対策 500問

The clearest difference is price: Mental Math at Free against 認定看護管理者対策 500問's $3.99. Mental Math also leads on update cadence (every 8 days vs every 3 weeks). 認定看護管理者対策 500問's advantage is in-app purchases (none vs 3) and ads (none vs shown).

Mental Math is free to download; 認定看護管理者対策 500問 costs $3.99 up front. Mental Math sells 3 in-app purchases, starting at $2.99 per month. 認定看護管理者対策 500問 asks for nothing beyond the download.

Mental Math ships an update every 8 days, 認定看護管理者対策 500問 every 3 weeks. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Mental Math | 認定看護管理者対策 500問 |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.3 (4 ratings)](https://appshunter.io/ios/app/mental-math-soroban-abacus/id6476421167/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 22.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 8 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 56 MB | 34 MB |
| Requires iOS | 17.2 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TAKAYUKI HASHIMOTO](https://appshunter.io/developer/1689527181) | [satoshi yoshida](https://appshunter.io/developer/1873856165) |

## What reviewers say

### Mental Math

[App page](https://appshunter.io/ios/app/mental-math-soroban-abacus/id6476421167)

Sharpen your mental math skills with this engaging app focused on addition. Customize card numbers and timing intervals for a personalized learning experience. Track your progress with visually stimulating graphics, suitable for all ages.

**Highlights:** Customizable card numbers, Adjustable timing intervals, Focus on addition, Progress tracking, Engaging visuals, User-friendly interface

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月間プラン | $2.99 | per month |
| 年間プラン | $19.99 | per year |
| Lifetime Premium | $39.99 | one-time |


### 認定看護管理者対策 500問

[App page](https://appshunter.io/ios/app/500/id6790070523)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mental Math free?

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

### Is 認定看護管理者対策 500問 free?

認定看護管理者対策 500問 costs $3.99, with no in-app purchases.

### Do Mental Math or 認定看護管理者対策 500問 have ads?

Mental Math shows ads; 認定看護管理者対策 500問 does not.

### Which is updated more often, Mental Math or 認定看護管理者対策 500問?

Mental Math ships an update every 8 days, and 認定看護管理者対策 500問 every 3 weeks. Most recently, Mental Math was updated on October 30, 2026 and 認定看護管理者対策 500問 on October 28, 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.*