# Bilingual Beginners Book vs (Open Source) Mental Math

The clearest difference is price: (Open Source) Mental Math at Free against Bilingual Beginners Book's $3.99. (Open Source) Mental Math also leads on update cadence (every 5 weeks vs every 40 months). Bilingual Beginners Book's advantage is iOS requirement (13.0 vs 16.4). On ads, in-app purchases and device support there is nothing between them.

(Open Source) Mental Math is free to download; Bilingual Beginners Book costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Bilingual Beginners Book ships an update every 40 months, (Open Source) Mental Math every 5 weeks. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Bilingual Beginners Book | (Open Source) Mental Math |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/open-source-mental-math/id6788418444/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 5 weeks** |
| Monetization | — | Free |
| Size | 465 MB | 41 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [CogWrite Learning Analytics LLC](https://appshunter.io/developer/410496428) | [AHMET EMRE DEDELER](https://appshunter.io/developer/1870913629) |

## What reviewers say

### Bilingual Beginners Book

[App page](https://appshunter.io/ios/app/bilingual-beginners-book/id633008779)

**Features:** macOS Compatibility

**In-app purchases:** none


### (Open Source) Mental Math

[App page](https://appshunter.io/ios/app/open-source-mental-math/id6788418444)

This application offers a free, open-source platform for practicing mental arithmetic. It features timed tests, custom drills, and a comprehensive library of mental math tricks. All content is available offline without ads or paywalls.

**Highlights:** Timed arithmetic tests, Customizable drills, Mental math tricks library, Offline progress tracking, Multiple operation types, Fast session interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Bilingual Beginners Book free?

Bilingual Beginners Book costs $3.99, with no in-app purchases.

### Is (Open Source) Mental Math free?

(Open Source) Mental Math is free to download, with no in-app purchases.

### Do Bilingual Beginners Book or (Open Source) Mental Math have ads?

Neither Bilingual Beginners Book nor (Open Source) Mental Math shows ads.

### Which is updated more often, Bilingual Beginners Book or (Open Source) Mental Math?

Bilingual Beginners Book ships an update every 40 months, and (Open Source) Mental Math every 5 weeks. Most recently, Bilingual Beginners Book was updated on October 10, 2026 and (Open Source) Mental Math on October 6, 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.*