# Calculate Standard Deviation vs IntroStat

The clearest difference is review sentiment: IntroStat at 92% against Calculate Standard Deviation's 50%. IntroStat also leads on rating (4.9 vs 4.5) and update cadence (every 3 months vs every 7 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Calculate Standard Deviation sells 1 one-off in-app purchase and IntroStat sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

IntroStat holds the better App Store score, 4.9 against 4.5. Both are backed by a comparable volume of ratings — 62 and 24 respectively. Written reviews point the same way: 50% of Calculate Standard Deviation's written reviews are positive against 92% of IntroStat's.

Calculate Standard Deviation ships an update every 7 months, IntroStat every 3 months. The most recent releases landed on September 22, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Calculate Standard Deviation | IntroStat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (62 ratings)](https://appshunter.io/ios/app/calculate-standard-deviation/id1591420646/reviews) | **[4.9 (24 ratings)](https://appshunter.io/ios/app/introstat-statistics-solver/id1592602025/reviews)** |
| Number of ratings | **62** | 24 |
| Positive reviews | 50.0% of reviews | **92.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 39 MB | 38 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) | [Zhiyi Zhang](https://appshunter.io/developer/1592602327) |

## 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 |


### IntroStat

[App page](https://appshunter.io/ios/app/introstat-statistics-solver/id1592602025)

This app serves as a comprehensive statistics calculator and learning tool for introductory statistics courses. It offers a wide range of calculation features, data visualization, and an integrated textbook with formulas and examples.

**Highlights:** Summary statistics calculation, Data visualization (boxplots, histograms), Probability calculations, Hypothesis testing, Confidence intervals, Integrated statistics textbook

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IntroStat Premium Features | $4.99 | one-time |


## Frequently asked questions

### Is Calculate Standard Deviation free?

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

### Is IntroStat free?

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

### Which has better reviews, Calculate Standard Deviation or IntroStat?

IntroStat is rated higher. Calculate Standard Deviation averages 4.5 out of 5 from 62 ratings, while IntroStat averages 4.9 from 24 ratings.

### Do Calculate Standard Deviation or IntroStat have ads?

Both Calculate Standard Deviation and IntroStat show ads.

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

Calculate Standard Deviation ships an update every 7 months, and IntroStat every 3 months. Most recently, Calculate Standard Deviation was updated on September 22, 2026 and IntroStat on September 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.*