# MyBrainyTools vs Uncertainty Calculator

The clearest difference is price: MyBrainyTools at Free against Uncertainty Calculator's $3.99. MyBrainyTools also leads on iOS requirement (15.0 vs 17.0). Uncertainty Calculator's advantage is update cadence (every 3 months vs every 40 months). On ads, in-app purchases and device support there is nothing between them.

MyBrainyTools is free to download; Uncertainty Calculator costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

MyBrainyTools ships an update every 40 months, Uncertainty Calculator every 3 months. The most recent releases landed on October 28, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | MyBrainyTools | Uncertainty Calculator |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/uncertainty-calculator/id1170905440/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 3 months** |
| Monetization | — | Paid |
| Size | 14 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [ray low](https://appshunter.io/developer/1078119330) | [Roman Volinsky](https://appshunter.io/developer/977951850) |

## What reviewers say

### MyBrainyTools

[App page](https://appshunter.io/ios/app/mybrainytools/id1078119331)

**Features:** macOS Compatibility

**In-app purchases:** none


### Uncertainty Calculator

[App page](https://appshunter.io/ios/app/uncertainty-calculator/id1170905440)

This app allows users to perform error propagation calculations for mathematical expressions involving uncertain variables. It supports absolute and relative error inputs, various functions, and trigonometric calculations in degrees or radians. The tool helps ensure accurate reporting of results based on estimated errors.

**Highlights:** Error propagation calculations, Absolute and relative error input, Support for mathematical functions, Trigonometric calculations (degrees/radians), Variable combination in expressions, Significant figure guidance

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

**In-app purchases:** none


## Frequently asked questions

### Is MyBrainyTools free?

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

### Is Uncertainty Calculator free?

Uncertainty Calculator costs $3.99, with no in-app purchases.

### Do MyBrainyTools or Uncertainty Calculator have ads?

Neither MyBrainyTools nor Uncertainty Calculator shows ads.

### Which is updated more often, MyBrainyTools or Uncertainty Calculator?

MyBrainyTools ships an update every 40 months, and Uncertainty Calculator every 3 months. Most recently, MyBrainyTools was updated on October 28, 2026 and Uncertainty Calculator on October 18, 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.*