# Tally vs (Open Source) Mental Math

The clearest difference is in-app purchases: (Open Source) Mental Math at none against Tally's 3. Tally's advantage is update cadence (every 2 weeks vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Tally sells 3 in-app purchases, starting at $3.99 per month. (Open Source) Mental Math asks for nothing beyond the download.

Tally ships an update every 2 weeks, (Open Source) Mental Math every 5 weeks. The most recent releases landed on November 10, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Tally | (Open Source) Mental Math |
| --- | --- | --- |
| Price | Free | 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 | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 5 weeks |
| Monetization | — | Free |
| Size | 2 MB | 41 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SG APPs](https://appshunter.io/developer/1507658418) | [AHMET EMRE DEDELER](https://appshunter.io/developer/1870913629) |

## What reviewers say

### Tally

[App page](https://appshunter.io/ios/app/tally-mental-math-trainer/id6787205145)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| Pro Yearly | $24.99 | per year |
| Pro Lifetime | $39.99 | one-time |


### (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 Tally free?

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

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

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

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

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

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

Tally ships an update every 2 weeks, and (Open Source) Mental Math every 5 weeks. Most recently, Tally was updated on November 10, 2026 and (Open Source) Mental Math on October 31, 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.*