# Numbas vs SI App

The clearest difference is update cadence: SI App at weekly against Numbas's every 3 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.

Numbas ships an update every 3 months, SI App weekly. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Numbas | SI App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 0 MB | 46 MB |
| Requires iOS | 15.0 | **14.0.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Newcastle University](https://appshunter.io/developer/558828803) | [Harrow International School (Hong Kong) Limited](https://appshunter.io/developer/1835233348) |

## What reviewers say

### Numbas

[App page](https://appshunter.io/ios/app/numbas/id6443798499)

**Features:** Vision Pro support

**In-app purchases:** none


### SI App

[App page](https://appshunter.io/ios/app/si-app/id6751456641)

**In-app purchases:** none


## Frequently asked questions

### Is Numbas free?

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

### Is SI App free?

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

### Do Numbas or SI App have ads?

Neither Numbas nor SI App shows ads.

### Which is updated more often, Numbas or SI App?

Numbas ships an update every 3 months, and SI App weekly. Most recently, Numbas was updated on October 9, 2026 and SI App on October 10, 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.*