# Mentor Books vs Dublin Maths

The clearest difference is update cadence: Mentor Books at every 5 months against Dublin Maths's every 10 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.

Mentor Books ships an update every 5 months, Dublin Maths every 10 months. Both last shipped on September 17, 2026.

## The numbers

| Metric | Mentor Books | Dublin Maths |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 10 months |
| Size | 22 MB | 187 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mentor Books](https://appshunter.io/developer/556026395) | [Dublin Maths](https://appshunter.io/developer/1826270766) |

## What reviewers say

### Mentor Books

[App page](https://appshunter.io/ios/app/mentor-books/id556026392)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dublin Maths

[App page](https://appshunter.io/ios/app/dublin-maths/id6736939184)

**In-app purchases:** none


## Frequently asked questions

### Is Mentor Books free?

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

### Is Dublin Maths free?

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

### Do Mentor Books or Dublin Maths have ads?

Neither Mentor Books nor Dublin Maths shows ads.

### Which is updated more often, Mentor Books or Dublin Maths?

Mentor Books ships an update every 5 months, and Dublin Maths every 10 months. Most recently, Mentor Books was updated on September 17, 2026 and Dublin Maths on September 17, 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.*