# 50以内加减法口算 vs Speed calculation

The clearest difference is in-app purchases: 50以内加减法口算 at none against Speed calculation's 1. 50以内加减法口算 also leads on ads (none vs shown) and iOS requirement (11.0 vs 16.0). Speed calculation's advantage is update cadence (every 5 months vs every 22 months). On price and device support there is nothing between them.

Both are free to download. Speed calculation sells 1 one-off in-app purchase. 50以内加减法口算 asks for nothing beyond the download.

50以内加减法口算 ships an update every 22 months, Speed calculation every 5 months. The most recent releases landed on September 29, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | 50以内加减法口算 | Speed calculation |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 22 months | **Every 5 months** |
| Monetization | Free | — |
| Size | 27 MB | 4 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [华 周](https://appshunter.io/developer/569428357) | [宏斌 樊](https://appshunter.io/developer/1452129040) |

## What reviewers say

### 50以内加减法口算

[App page](https://appshunter.io/ios/app/50/id1087409881)

This app helps children aged 3-7 develop essential mental math skills within 50. It offers engaging game-based learning for addition, subtraction, and mixed operations, with adjustable difficulty levels and helpful hints.

**Highlights:** Mental math practice within 50, Addition and subtraction exercises, Mixed operation calculations, Game-based learning, Adjustable difficulty levels, Real voice prompts, Practice and test modes

**Features:** macOS Compatibility

**In-app purchases:** none


### Speed calculation

[App page](https://appshunter.io/ios/app/speed-calculation/id1436483686)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads. | $3.99 | one-time |


## Frequently asked questions

### Is 50以内加减法口算 free?

50以内加减法口算 is free to download, with no in-app purchases.

### Is Speed calculation free?

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

### Do 50以内加减法口算 or Speed calculation have ads?

Speed calculation shows ads; 50以内加减法口算 does not.

### Which is updated more often, 50以内加减法口算 or Speed calculation?

50以内加减法口算 ships an update every 22 months, and Speed calculation every 5 months. Most recently, 50以内加减法口算 was updated on September 29, 2026 and Speed calculation on September 20, 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.*