# Calculate Standard Deviation vs CougarStats

The clearest difference is in-app purchases: CougarStats at none against Calculate Standard Deviation's 1. CougarStats also leads on ads (none vs shown) and review sentiment (80% vs 50%). Calculate Standard Deviation's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price there is nothing between them.

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

Calculate Standard Deviation ships an update every 7 months, CougarStats weekly. The most recent releases landed on October 3, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Calculate Standard Deviation | CougarStats |
| --- | --- | --- |
| 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 | **80.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 39 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Asad Ahsan](https://appshunter.io/developer/1326954499) | [Ashok Krishnamurthy](https://appshunter.io/developer/1725732999) |

## 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 |


### CougarStats

[App page](https://appshunter.io/ios/app/cougarstats/id6476070179)

This app simplifies statistical concepts for students and instructors. It offers tools for descriptive statistics, probability distributions, inference, and regression analysis, aiming to enhance understanding of statistical results.

**Highlights:** Descriptive Statistics, Probability Distributions, Statistical Inference, Simple Linear Regression, Correlation Analysis, User-friendly interface

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

**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 CougarStats free?

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

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

Calculate Standard Deviation shows ads; CougarStats does not.

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

Calculate Standard Deviation ships an update every 7 months, and CougarStats weekly. Most recently, Calculate Standard Deviation was updated on October 3, 2026 and CougarStats on October 5, 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.*