# Calculate Standard Deviation vs Izzy Statistics Pro

The clearest difference is price: Calculate Standard Deviation at Free against Izzy Statistics Pro's $3.99. Izzy Statistics Pro's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence and device support there is nothing between them.

Calculate Standard Deviation is free to download; Izzy Statistics Pro costs $3.99 up front. Calculate Standard Deviation sells 1 one-off in-app purchase. Izzy Statistics Pro asks for nothing beyond the download.

Calculate Standard Deviation ships an update every 7 months, Izzy Statistics Pro every 4 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Calculate Standard Deviation | Izzy Statistics Pro |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| 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 | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Every 4 months** |
| Monetization | Free with in-app purchases | — |
| Size | 39 MB | 22 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Asad Ahsan](https://appshunter.io/developer/1326954499) | [Bryan Oswaldo Gomez Perez](https://appshunter.io/developer/1573114808) |

## 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 |


### Izzy Statistics Pro

[App page](https://appshunter.io/ios/app/izzy-statistics-pro/id1607714433)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calculate Standard Deviation free?

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

### Is Izzy Statistics Pro free?

Izzy Statistics Pro costs $3.99, with no in-app purchases.

### Do Calculate Standard Deviation or Izzy Statistics Pro have ads?

Calculate Standard Deviation shows ads; Izzy Statistics Pro does not.

### Which is updated more often, Calculate Standard Deviation or Izzy Statistics Pro?

Calculate Standard Deviation ships an update every 7 months, and Izzy Statistics Pro every 4 months. Most recently, Calculate Standard Deviation was updated on November 3, 2026 and Izzy Statistics Pro on November 3, 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.*