# 双语日记 vs 大日AI课堂：中级

The clearest difference is in-app purchases: 双语日记 at none against 大日AI课堂：中级's 1. 双语日记 also leads on ads (none vs shown) and update cadence (daily vs every 3 weeks). 大日AI课堂：中级's advantage is iOS requirement (14.0 vs 17.6). On price and device support there is nothing between them.

Both are free to download. 大日AI课堂：中级 sells 1 one-off in-app purchase. 双语日记 asks for nothing beyond the download.

双语日记 ships an update daily, 大日AI课堂：中级 every 3 weeks. Both last shipped on October 6, 2026.

## The numbers

| Metric | 双语日记 | 大日AI课堂：中级 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 3 weeks |
| Size | 5 MB | 73 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [增宝 王](https://appshunter.io/developer/827650044) | [盖粦 徐](https://appshunter.io/developer/1724030910) |

## What reviewers say

### 双语日记

[App page](https://appshunter.io/ios/app/id6711354518)

**Features:** macOS Compatibility

**In-app purchases:** none


### 大日AI课堂：中级

[App page](https://appshunter.io/ios/app/ai/id6740695857)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 大日AI课堂：中级永久会员 | $3.99 | one-time |


## Frequently asked questions

### Is 双语日记 free?

双语日记 is free to download, with no in-app purchases.

### Is 大日AI课堂：中级 free?

大日AI课堂：中级 is free to download, with in-app purchases available.

### Do 双语日记 or 大日AI课堂：中级 have ads?

大日AI课堂：中级 shows ads; 双语日记 does not.

### Which is updated more often, 双语日记 or 大日AI课堂：中级?

双语日记 ships an update daily, and 大日AI课堂：中级 every 3 weeks. Most recently, 双语日记 was updated on October 6, 2026 and 大日AI课堂：中级 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.*