# 快乐学 vs KeyPass

The clearest difference is in-app purchases: KeyPass at none against 快乐学's 10. 快乐学's advantage is iOS requirement (9.0 vs 14.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 快乐学 sells 10 one-off in-app purchases. KeyPass asks for nothing beyond the download.

快乐学 ships an update every 4 months, KeyPass every 2 months. The most recent releases landed on September 13, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | 快乐学 | KeyPass |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 53 MB | 22 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [郴 石](https://appshunter.io/developer/1250406946) | [斯理 梁](https://appshunter.io/developer/1883632984) |

## What reviewers say

### 快乐学

[App page](https://appshunter.io/ios/app/id1449543741)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 小学语文二年级(上册) | $2.99 | one-time |
| 小学语文三年级(上册) | $2.99 | one-time |
| 小学语文三年级(下册) | $2.99 | one-time |
| 小学语文二年级(下册) | $2.99 | one-time |
| 小学英语一年级(下册) | $2.99 | one-time |
| 小学英语一年级(上册) | $2.99 | one-time |
| 小学英语二年级(下册) | $2.99 | one-time |
| 小学英语二年级(上册) | $2.99 | one-time |
| 小学英语三年级(上册) | $2.99 | one-time |
| 小学英语三年级(下册) | $2.99 | one-time |


### KeyPass

[App page](https://appshunter.io/ios/app/keypass/id6761231171)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 快乐学 free?

快乐学 is free to download, with in-app purchases available.

### Is KeyPass free?

KeyPass is free to download, with no in-app purchases.

### Do 快乐学 or KeyPass have ads?

Neither 快乐学 nor KeyPass shows ads.

### Which is updated more often, 快乐学 or KeyPass?

快乐学 ships an update every 4 months, and KeyPass every 2 months. Most recently, 快乐学 was updated on September 13, 2026 and KeyPass on September 21, 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.*