# Calculate Standard Deviation vs Mindful Theory Driving

The clearest difference is ads: Mindful Theory Driving at none against Calculate Standard Deviation's shown. Mindful Theory Driving also leads on update cadence (fortnightly vs every 7 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Calculate Standard Deviation sells 1 one-off in-app purchase and Mindful Theory Driving sells 5 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Calculate Standard Deviation ships an update every 7 months, Mindful Theory Driving fortnightly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Calculate Standard Deviation | Mindful Theory Driving |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (62 ratings)](https://appshunter.io/ios/app/calculate-standard-deviation/id1591420646/reviews)** | — |
| Number of ratings | **62** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 39 MB | 21 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Asad Ahsan](https://appshunter.io/developer/1326954499) | [Mindful Gaming UK](https://appshunter.io/developer/6789884623) |

## What reviewers say

### Calculate Standard Deviation

[App page](https://appshunter.io/ios/app/calculate-standard-deviation/id1591420646)

This app calculates standard deviation, variance, and other statistical measures for a given set of values. It simplifies complex statistical formulas with a user-friendly interface and accurate results.

**Highlights:** Calculate Standard Deviation, Calculate Variance, Calculate Mean, Calculate Coefficient of Variance, Calculate Standard Error of Mean, User-friendly interface, Accurate statistical results

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard Deviation Premium | $4.99 | one-time |


### Mindful Theory Driving

[App page](https://appshunter.io/ios/app/mindful-theory-driving/id6789884621)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Motorcycle Theory | $4.99 | per month |
| Car Theory | $4.99 | per month |
| HGV Theory | $4.99 | per month |
| ADI Theory | $4.99 | per month |
| PCV Theory | $4.99 | per month |


## Frequently asked questions

### Is Calculate Standard Deviation free?

Calculate Standard Deviation is free to download, with in-app purchases available.

### Is Mindful Theory Driving free?

Mindful Theory Driving is free to download, with in-app purchases available.

### Do Calculate Standard Deviation or Mindful Theory Driving have ads?

Calculate Standard Deviation shows ads; Mindful Theory Driving does not.

### Which is updated more often, Calculate Standard Deviation or Mindful Theory Driving?

Calculate Standard Deviation ships an update every 7 months, and Mindful Theory Driving fortnightly. Most recently, Calculate Standard Deviation was updated on November 3, 2026 and Mindful Theory Driving 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.*