# 白鸭PTE vs Basic 850

The clearest difference is update cadence: 白鸭PTE at weekly against Basic 850's every 4 months. 白鸭PTE also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 白鸭PTE sells 4 one-off in-app purchases and Basic 850 sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

白鸭PTE ships an update weekly, Basic 850 every 4 months. The most recent releases landed on September 16, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 白鸭PTE | Basic 850 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 months |
| Size | 81 MB | 184 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sichuan Octopus Classroom Technology Co., Ltd](https://appshunter.io/developer/1821614169) | [宝 谢](https://appshunter.io/developer/6773539519) |

## What reviewers say

### 白鸭PTE

[App page](https://appshunter.io/ios/app/pte-ai-pte/id6747472486)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30天会员 | $6.99 | one-time |
| 60天会员 | $12.99 | one-time |
| 90天会员 | $19.99 | one-time |
| 180天会员 | $34.99 | one-time |


### Basic 850

[App page](https://appshunter.io/ios/app/basic-850/id6774764253)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic 850 Plus (Monthly) | $2.99 | per month |
| Basic 850 Plus (Yearly) | $19.99 | per year |
| Basic 850 Plus（買い切り） | $29.99 | one-time |


## Frequently asked questions

### Is 白鸭PTE free?

白鸭PTE is free to download, with in-app purchases available.

### Is Basic 850 free?

Basic 850 is free to download, with in-app purchases available.

### Do 白鸭PTE or Basic 850 have ads?

Neither 白鸭PTE nor Basic 850 shows ads.

### Which is updated more often, 白鸭PTE or Basic 850?

白鸭PTE ships an update weekly, and Basic 850 every 4 months. Most recently, 白鸭PTE was updated on September 16, 2026 and Basic 850 on October 6, 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.*