# 50以内加减法口算 vs 数学口算HD

The clearest difference is in-app purchases: 50以内加减法口算 at none against 数学口算HD's 7. 50以内加减法口算 also leads on review sentiment (100% vs 75%). 数学口算HD's advantage is update cadence (every 6 months vs every 22 months) and iOS requirement (9.0 vs 11.0). On price, ads and device support there is nothing between them.

Both are free to download. 数学口算HD sells 7 one-off in-app purchases. 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, 数学口算HD every 6 months. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | 50以内加减法口算 | 数学口算HD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/hd/id1632726087/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 6 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 27 MB | 4 MB |
| Requires iOS | 11.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [华 周](https://appshunter.io/developer/569428357) | [摇摇 章](https://appshunter.io/developer/1570032236) |

## 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


### 数学口算HD

[App page](https://appshunter.io/ios/app/hd/id1632726087)

This app simulates paper-based math drills for elementary students, offering customizable practice tests, automatic grading, and detailed error analysis. It covers addition, subtraction, multiplication, division, decimals, and fractions for grades 1-6, with a large question bank and printable options.

**Highlights:** Simulated paper test experience, Customizable test generation, Automatic grading and error analysis, Printable practice sheets, Grade-level specific question bank, Handwriting practice area

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一年级口算 | $2.99 | one-time |
| 二年级口算 | $2.99 | one-time |
| 三年级口算 | $2.99 | one-time |
| 四年级口算 | $2.99 | one-time |
| 五年级口算 | $2.99 | one-time |
| 六年级口算 | $2.99 | one-time |
| 数学口算至尊VIP | $4.99 | 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 数学口算HD free?

数学口算HD is free to download, with in-app purchases available.

### Do 50以内加减法口算 or 数学口算HD have ads?

Neither 50以内加减法口算 nor 数学口算HD shows ads.

### Which is updated more often, 50以内加减法口算 or 数学口算HD?

50以内加减法口算 ships an update every 22 months, and 数学口算HD every 6 months. Most recently, 50以内加减法口算 was updated on October 14, 2026 and 数学口算HD on October 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*