# HKBUniverse vs Pure Math Pro

The clearest difference is in-app purchases: HKBUniverse at none against Pure Math Pro's 10. HKBUniverse also leads on update cadence (every 3 months vs every 11 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Pure Math Pro sells 10 one-off in-app purchases. HKBUniverse asks for nothing beyond the download.

HKBUniverse ships an update every 3 months, Pure Math Pro every 11 months. The most recent releases landed on September 13, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | HKBUniverse | Pure Math Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 11 months |
| Size | 1.8 GB | 40 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Hong Kong Baptist University](https://appshunter.io/developer/427917925) | [Richard Ssenyonjo](https://appshunter.io/developer/1528776742) |

## What reviewers say

### HKBUniverse

[App page](https://appshunter.io/ios/app/hkbuniverse/id1669663392)

**In-app purchases:** none


### Pure Math Pro

[App page](https://appshunter.io/ios/app/pure-math-pro/id6740227640)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get 1,000 Coins | $0.99 | one-time |
| Get 5,000 Coins | $1.99 | one-time |
| Algebra 2 | $2.99 | one-time |
| Series | $2.99 | one-time |
| Trigonometry 1 | $2.99 | one-time |
| Coordinate Geometry | $2.99 | one-time |
| Coordinate Geometry 2 | $2.99 | one-time |
| Complex Numbers | $2.99 | one-time |
| Vectors in 3D | $2.99 | one-time |
| Get 10,000 Coins | $2.99 | one-time |


## Frequently asked questions

### Is HKBUniverse free?

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

### Is Pure Math Pro free?

Pure Math Pro is free to download, with in-app purchases available.

### Do HKBUniverse or Pure Math Pro have ads?

Neither HKBUniverse nor Pure Math Pro shows ads.

### Which is updated more often, HKBUniverse or Pure Math Pro?

HKBUniverse ships an update every 3 months, and Pure Math Pro every 11 months. Most recently, HKBUniverse was updated on September 13, 2026 and Pure Math Pro on September 14, 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.*