# Citatum vs Math Surface

The clearest difference is ads: Citatum at none against Math Surface's shown. Citatum also leads on iOS requirement (18.6 vs 26.2). On price, update cadence, 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.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 20, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Citatum | Math Surface |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Weekly | Weekly |
| Size | 78 MB | 10 MB |
| Requires iOS | **18.6** | 26.2 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ezequiel Santos](https://appshunter.io/developer/881137141) | [yuya kanbetsunawa](https://appshunter.io/developer/1597026161) |

## What reviewers say

### Citatum

[App page](https://appshunter.io/ios/app/citatum-academic-citations/id6624314212)

**Features:** Vision Pro support

**In-app purchases:** none


### Math Surface

[App page](https://appshunter.io/ios/app/math-surface/id6774883910)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Citatum free?

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

### Is Math Surface free?

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

### Do Citatum or Math Surface have ads?

Math Surface shows ads; Citatum does not.

### Which is updated more often, Citatum or Math Surface?

Citatum ships an update weekly, and Math Surface weekly. Most recently, Citatum was updated on September 20, 2026 and Math Surface on September 22, 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.*