# 99课堂 vs izis go

The clearest difference is iOS requirement: 99课堂 at 10.0 against izis go's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

99课堂 ships an update monthly, izis go every 3 weeks. The most recent releases landed on October 13, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | 99课堂 | izis go |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 182 MB | 99 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [西安九九云教育科技有限公司](https://appshunter.io/developer/1413663363) | [湖南隐智科技有限公司](https://appshunter.io/developer/1188203955) |

## What reviewers say

### 99课堂

[App page](https://appshunter.io/ios/app/99/id1531982199)

**Features:** macOS Compatibility

**In-app purchases:** none


### izis go

[App page](https://appshunter.io/ios/app/izis-go/id1549167650)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 99课堂 free?

99课堂 is free to download, with no in-app purchases.

### Is izis go free?

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

### Do 99课堂 or izis go have ads?

Neither 99课堂 nor izis go shows ads.

### Which is updated more often, 99课堂 or izis go?

99课堂 ships an update monthly, and izis go every 3 weeks. Most recently, 99课堂 was updated on October 13, 2026 and izis go on October 17, 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.*