# 教城教師 vs i

The clearest difference is update cadence: 教城教師 at every 3 weeks against i's every 12 months. i's advantage is iOS requirement (12.1 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

教城教師 ships an update every 3 weeks, i every 12 months. The most recent releases landed on September 14, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | 教城教師 | i |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 12 months |
| Size | 37 MB | 64 MB |
| Requires iOS | 15.1 | **12.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Hong Kong Education City Limited](https://appshunter.io/developer/672104764) | [Hong Kong Examinations And Assessment Authority](https://appshunter.io/developer/1515449413) |

## What reviewers say

### 教城教師

[App page](https://appshunter.io/ios/app/id1664047385)

**Features:** Vision Pro support

**In-app purchases:** none


### i

[App page](https://appshunter.io/ios/app/i-invigilation-hkdse/id6444061740)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 教城教師 free?

教城教師 is free to download, with no in-app purchases.

### Is i free?

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

### Do 教城教師 or i have ads?

Neither 教城教師 nor i shows ads.

### Which is updated more often, 教城教師 or i?

教城教師 ships an update every 3 weeks, and i every 12 months. Most recently, 教城教師 was updated on September 14, 2026 and i on September 16, 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.*