# HKBU CIE vs ExploreMath

The clearest difference is update cadence: ExploreMath at every 6 days against HKBU CIE's every 84 months. 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.

HKBU CIE ships an update every 84 months, ExploreMath every 6 days. The most recent releases landed on September 21, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | HKBU CIE | ExploreMath |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 84 months | **Every 6 days** |
| Size | 1 MB | 4 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hong Kong Baptist University](https://appshunter.io/developer/427917925) | [Kai Hin Tsoi](https://appshunter.io/developer/1618879551) |

## What reviewers say

### HKBU CIE

[App page](https://appshunter.io/ios/app/hkbu-cie/id992400684)

**Features:** macOS Compatibility

**In-app purchases:** none


### ExploreMath

[App page](https://appshunter.io/ios/app/exploremath/id1620810052)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HKBU CIE free?

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

### Is ExploreMath free?

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

### Do HKBU CIE or ExploreMath have ads?

Neither HKBU CIE nor ExploreMath shows ads.

### Which is updated more often, HKBU CIE or ExploreMath?

HKBU CIE ships an update every 84 months, and ExploreMath every 6 days. Most recently, HKBU CIE was updated on September 21, 2026 and ExploreMath on June 5, 2026.

---

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