# 剑桥KETPET英语 vs 外研剑桥Join In

The clearest difference is in-app purchases: 外研剑桥Join In at none against 剑桥KETPET英语's 17. 外研剑桥Join In also leads on ads (none vs shown) and iOS requirement (11.0 vs 13.0). On price, update cadence and device support there is nothing between them.

Both are free to download. 剑桥KETPET英语 sells 17 one-off in-app purchases. 外研剑桥Join In asks for nothing beyond the download.

剑桥KETPET英语 ships an update monthly, 外研剑桥Join In every 2 months. The most recent releases landed on September 21, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | 剑桥KETPET英语 | 外研剑桥Join In |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 2 months |
| Size | 293 MB | 38 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [北京万鑫联合科技有限公司](https://appshunter.io/developer/1326033029) | [凡 吕](https://appshunter.io/developer/1660488640) |

## What reviewers say

### 剑桥KETPET英语

[App page](https://appshunter.io/ios/app/ketpet/id1477177955)

**Features:** macOS Compatibility

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 自然拼读初级VIP会员 | $3.99 | one-time |
| 自然拼读中级VIP会员 | $9.99 | one-time |
| 1个月VIP会员 | $9.99 | one-time |
| 自然拼读高级VIP会员 | $19.99 | one-time |
| 3个月VIP会员 | $29.99 | one-time |
| 自然拼读初级+中级+高级VIP会员 | $29.99 | one-time |
| 剑桥陪跑课程PreG1 | $29.99 | one-time |
| 6个月VIP会员 | $59.99 | one-time |
| 剑桥陪跑课程G1 | $89.99 | one-time |
| 剑桥陪跑课程G2 | $89.99 | one-time |
| 剑桥陪跑课程G4 | $89.99 | one-time |
| 剑桥陪跑课程G3 | $89.99 | one-time |
| 剑桥陪跑课程G6 | $89.99 | one-time |
| 剑桥陪跑课程G5 | $89.99 | one-time |
| 4年VIP会员 | $349.99 | one-time |
| 5年VIP会员 | $399.99 | one-time |
| 6年VIP会员 | $449.99 | one-time |


### 外研剑桥Join In

[App page](https://appshunter.io/ios/app/join-in/id1668536502)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 剑桥KETPET英语 free?

剑桥KETPET英语 is free to download, with in-app purchases available.

### Is 外研剑桥Join In free?

外研剑桥Join In is free to download, with no in-app purchases.

### Do 剑桥KETPET英语 or 外研剑桥Join In have ads?

剑桥KETPET英语 shows ads; 外研剑桥Join In does not.

### Which is updated more often, 剑桥KETPET英语 or 外研剑桥Join In?

剑桥KETPET英语 ships an update monthly, and 外研剑桥Join In every 2 months. Most recently, 剑桥KETPET英语 was updated on September 21, 2026 and 外研剑桥Join In on September 5, 2026.

---

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