# 20以内加减法口算 vs 2Kids识字

The clearest difference is review sentiment: 20以内加减法口算 at 100% against 2Kids识字's 56%. 20以内加减法口算 also leads on in-app purchases (none vs 5). 2Kids识字's advantage is update cadence (every 2 months vs every 23 months) and rating (4.7 vs 4.3). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. 2Kids识字 sells 5 one-off in-app purchases. 20以内加减法口算 asks for nothing beyond the download.

2Kids识字 holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 56 and 124 respectively. Written reviews complicate that: 100% of 20以内加减法口算's written reviews are positive against 56% of 2Kids识字's, so the app with the better star average is not the one people write more warmly about.

20以内加减法口算 ships an update every 23 months, 2Kids识字 every 2 months. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | 20以内加减法口算 | 2Kids识字 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (56 ratings)](https://appshunter.io/ios/app/20/id1087409662/reviews) | **[4.7 (124 ratings)](https://appshunter.io/ios/app/2kids/id1229531306/reviews)** |
| Number of ratings | 56 | **124** |
| Positive reviews | **100.0% of reviews** | 55.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 42 MB | 487 MB |
| Requires iOS | **9.0** | 9.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [华 周](https://appshunter.io/developer/569428357) | [2Kids](https://appshunter.io/developer/1217081555) |

## What reviewers say

### 20以内加减法口算

[App page](https://appshunter.io/ios/app/20/id1087409662)

This app helps children aged 3-7 develop essential mental math skills with addition and subtraction problems up to 20. It uses engaging game-based learning with varying difficulty levels and includes practice and timed test modes.

**Highlights:** Addition and subtraction up to 20, Mixed operation practice, Game-based learning, Multiple difficulty levels, Practice mode with hints, Timed test mode, Voice prompts

**Features:** macOS Compatibility

**In-app purchases:** none


### 2Kids识字

[App page](https://appshunter.io/ios/app/2kids/id1229531306)

This app offers engaging literacy courses and graded picture book reading to help children master basic Chinese characters. It uses fun games and scientific methods to build strong reading habits and improve comprehension, with daily 10-minute sessions designed for efficient learning.

**Highlights:** Fun literacy courses, Graded picture book reading, Interactive learning games, Character root derivation, Voice recognition for dubbing, Daily 10-minute sessions

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 解锁全部功能（优惠68） | $9.99 | one-time |
| 解锁全部功能（2Kids福利官） | $12.99 | one-time |
| 解锁启蒙识字的全部功能 | $12.99 | one-time |
| 解锁扩展识字和幼小衔接的全部功能 | $12.99 | one-time |
| 解锁全部功能 | $19.99 | one-time |


## Frequently asked questions

### Is 20以内加减法口算 free?

20以内加减法口算 is free to download, with no in-app purchases.

### Is 2Kids识字 free?

2Kids识字 is free to download, with in-app purchases available.

### Which has better reviews, 20以内加减法口算 or 2Kids识字?

2Kids识字 is rated higher. 20以内加减法口算 averages 4.3 out of 5 from 56 ratings, while 2Kids识字 averages 4.7 from 124 ratings.

### Do 20以内加减法口算 or 2Kids识字 have ads?

Neither 20以内加减法口算 nor 2Kids识字 shows ads.

### Which is updated more often, 20以内加减法口算 or 2Kids识字?

20以内加减法口算 ships an update every 23 months, and 2Kids识字 every 2 months. Most recently, 20以内加减法口算 was updated on October 14, 2026 and 2Kids识字 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.*