# Simple Stat vs Calculate Standard Deviation

The clearest difference is rating: Calculate Standard Deviation at 4.5 against Simple Stat's 2.5. Calculate Standard Deviation also leads on ratings volume (62 vs 4). Simple Stat's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, review sentiment, update cadence and device support there is nothing between them.

Both are free to download. Calculate Standard Deviation sells 1 one-off in-app purchase. Simple Stat asks for nothing beyond the download.

Calculate Standard Deviation holds the better App Store score, 4.5 against 2.5. That said, the two scores are not equally well evidenced: Calculate Standard Deviation has 62 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 56% of Simple Stat's written reviews are positive against 50% of Calculate Standard Deviation's, so the app with the better star average is not the one people write more warmly about.

Simple Stat ships an update every 12 months, Calculate Standard Deviation every 7 months. The most recent releases landed on September 29, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Simple Stat | Calculate Standard Deviation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (4 ratings)](https://appshunter.io/ios/app/simple-stat-calculator-for-statistics-students/id358670046/reviews) | **[4.5 (62 ratings)](https://appshunter.io/ios/app/calculate-standard-deviation/id1591420646/reviews)** |
| Number of ratings | 4 | **62** |
| Positive reviews | **55.6% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 7 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 39 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Enrico Susatyo](https://appshunter.io/developer/358670049) | [Asad Ahsan](https://appshunter.io/developer/1326954499) |

## What reviewers say

### Simple Stat

[App page](https://appshunter.io/ios/app/simple-stat-calculator-for-statistics-students/id358670046)

This app provides essential statistical tests for first-year university students. It offers a user-friendly interface for common calculations like Z-tests and T-tests. Designed for ease of use in introductory statistics courses.

**Highlights:** Z-test for mean, Z-test for proportion, T-test, Two sample t-test, Paired t-test, Easy to use interface

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Simple Stat free?

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

### Is Calculate Standard Deviation free?

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

### Which has better reviews, Simple Stat or Calculate Standard Deviation?

Calculate Standard Deviation is rated higher. Simple Stat averages 2.5 out of 5 from 4 ratings, while Calculate Standard Deviation averages 4.5 from 62 ratings.

### Do Simple Stat or Calculate Standard Deviation have ads?

Calculate Standard Deviation shows ads; Simple Stat does not.

### Which is updated more often, Simple Stat or Calculate Standard Deviation?

Simple Stat ships an update every 12 months, and Calculate Standard Deviation every 7 months. Most recently, Simple Stat was updated on September 29, 2026 and Calculate Standard Deviation on October 20, 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.*