# (Open Source) Mental Math vs Numvolt

The clearest difference is rating: Numvolt at 5.0 against (Open Source) Mental Math's 3.0. Numvolt also leads on update cadence (daily vs every 5 weeks). (Open Source) Mental Math's advantage is in-app purchases (none vs 1). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Numvolt sells 1 one-off in-app purchase. (Open Source) Mental Math asks for nothing beyond the download.

Numvolt holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

(Open Source) Mental Math ships an update every 5 weeks, Numvolt daily. The most recent releases landed on October 6, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | (Open Source) Mental Math | Numvolt |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/open-source-mental-math/id6788418444/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/numvolt-mental-math-trainer/id6809142973/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Daily** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 41 MB | 42 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AHMET EMRE DEDELER](https://appshunter.io/developer/1870913629) | [ROMEO ILARIO FLAVIO GAMBINO](https://appshunter.io/developer/1874823696) |

## What reviewers say

### (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


### Numvolt

[App page](https://appshunter.io/ios/app/numvolt-mental-math-trainer/id6809142973)

Enhance your mental math skills with a comprehensive trainer offering 15 topics and 150 levels each. Learn fastest calculation methods, track progress, and compete globally. Features include daily challenges, duels, and a home screen widget.

**Highlights:** 15 topics, 150 levels each, Fastest calculation method explanations, Daily challenges and sprints, Global ladder rankings, Two-player duels, Progress tracking and home screen widget

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Numvolt Pro | $8.99 | one-time |


## Frequently asked questions

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

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

### Is Numvolt free?

Numvolt is free to download, with in-app purchases available.

### Which has better reviews, (Open Source) Mental Math or Numvolt?

Numvolt is rated higher. (Open Source) Mental Math averages 3.0 out of 5 from 2 ratings, while Numvolt averages 5.0 from 1 ratings.

### Do (Open Source) Mental Math or Numvolt have ads?

Neither (Open Source) Mental Math nor Numvolt shows ads.

### Which is updated more often, (Open Source) Mental Math or Numvolt?

(Open Source) Mental Math ships an update every 5 weeks, and Numvolt daily. Most recently, (Open Source) Mental Math was updated on October 6, 2026 and Numvolt on September 30, 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.*