# i vs PhyschinggLab

The clearest difference is update cadence: PhyschinggLab at every 6 weeks against i's every 12 months. i's advantage is iOS requirement (12.1 vs 18.0). 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, PhyschinggLab every 6 weeks. The most recent releases landed on October 20, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | i | PhyschinggLab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 6 weeks** |
| Size | 64 MB | 137 MB |
| Requires iOS | **12.1** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Hong Kong Examinations And Assessment Authority](https://appshunter.io/developer/1515449413) | [Si Ching Wong](https://appshunter.io/developer/1815745544) |

## What reviewers say

### i

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

**Features:** macOS Compatibility

**In-app purchases:** none


### PhyschinggLab

[App page](https://appshunter.io/ios/app/physchingglab/id6746209306)

**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 PhyschinggLab free?

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

### Do i or PhyschinggLab have ads?

Neither i nor PhyschinggLab shows ads.

### Which is updated more often, i or PhyschinggLab?

i ships an update every 12 months, and PhyschinggLab every 6 weeks. Most recently, i was updated on October 20, 2026 and PhyschinggLab on October 4, 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.*