# gMath vs i

The clearest difference is update cadence: gMath at every 2 weeks against i's every 12 months. gMath also leads on iOS requirement (9.0 vs 12.1). 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.

gMath ships an update every 2 weeks, i every 12 months. Both last shipped on November 12, 2026.

## The numbers

| Metric | gMath | i |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 12 months |
| Monetization | Free | — |
| Size | 18 MB | 64 MB |
| Requires iOS | **9.0** | 12.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [BULL.B TECHNOLOGY LIMITED](https://appshunter.io/developer/996574459) | [Hong Kong Examinations And Assessment Authority](https://appshunter.io/developer/1515449413) |

## What reviewers say

### gMath

[App page](https://appshunter.io/ios/app/gmath/id1203198710)

Explore interactive math applets created by educators to deepen understanding of mathematical concepts. This collection offers bilingual content and is freely available for students and teachers. Additional resources and updates are provided online.

**Highlights:** Interactive math applets, Bilingual content (English/Traditional Chinese), Designed by teachers, Free for students and teachers, Online resources and updates

**Features:** macOS Compatibility, 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 gMath free?

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

### Is i free?

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

### Do gMath or i have ads?

Neither gMath nor i shows ads.

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

gMath ships an update every 2 weeks, and i every 12 months. Most recently, gMath was updated on November 12, 2026 and i on November 12, 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.*