# i vs eClass Teacher IPX

The clearest difference is update cadence: eClass Teacher IPX at fortnightly against i's every 12 months. i's advantage is iOS requirement (12.1 vs 15). 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.

i ships an update every 12 months, eClass Teacher IPX fortnightly. The most recent releases landed on October 20, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | i | eClass Teacher IPX |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Fortnightly** |
| Size | 64 MB | 76 MB |
| Requires iOS | **12.1** | 15 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Hong Kong Examinations And Assessment Authority](https://appshunter.io/developer/1515449413) | [eClass Limited](https://appshunter.io/developer/1683448274) |

## What reviewers say

### i

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

**Features:** macOS Compatibility

**In-app purchases:** none


### eClass Teacher IPX

[App page](https://appshunter.io/ios/app/eclass-teacher-ipx/id6450973595)

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

**In-app purchases:** none


## Frequently asked questions

### Is i free?

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

### Is eClass Teacher IPX free?

eClass Teacher IPX is free to download, with no in-app purchases.

### Do i or eClass Teacher IPX have ads?

Neither i nor eClass Teacher IPX shows ads.

### Which is updated more often, i or eClass Teacher IPX?

i ships an update every 12 months, and eClass Teacher IPX fortnightly. Most recently, i was updated on October 20, 2026 and eClass Teacher IPX on October 22, 2026.

---

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