# Permutation and Combination vs IntroStat

The clearest difference is review sentiment: IntroStat at 92% against Permutation and Combination's 44%. IntroStat also leads on rating (4.9 vs 4.1) and update cadence (every 3 months vs every 40 months). Permutation and Combination's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, ratings volume, device support and iOS requirement there is nothing between them.

Both are free to download. IntroStat sells 1 one-off in-app purchase. Permutation and Combination asks for nothing beyond the download.

IntroStat holds the better App Store score, 4.9 against 4.1. Both are backed by a comparable volume of ratings — 13 and 24 respectively. Written reviews point the same way: 44% of Permutation and Combination's written reviews are positive against 92% of IntroStat's.

Permutation and Combination ships an update every 40 months, IntroStat every 3 months. The most recent releases landed on September 10, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Permutation and Combination | IntroStat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (13 ratings)](https://appshunter.io/ios/app/permutation-and-combination/id1006634963/reviews) | **[4.9 (24 ratings)](https://appshunter.io/ios/app/introstat-statistics-solver/id1592602025/reviews)** |
| Number of ratings | 13 | **24** |
| Positive reviews | 44.4% of reviews | **92.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 40 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 23 MB | 38 MB |
| Requires iOS | 12.1 | **11.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Keiji Matsui](https://appshunter.io/developer/365287272) | [Zhiyi Zhang](https://appshunter.io/developer/1592602327) |

## What reviewers say

### Permutation and Combination

[App page](https://appshunter.io/ios/app/permutation-and-combination/id1006634963)

Easily calculate permutations and combinations with this educational tool. It provides a straightforward way to solve mathematical problems related to arrangements and selections.

**Highlights:** Calculate permutations, Calculate combinations, Easy to use interface, Educational tool

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Permutation and Combination free?

Permutation and Combination is free to download, with no in-app purchases.

### Is IntroStat free?

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

### Which has better reviews, Permutation and Combination or IntroStat?

IntroStat is rated higher. Permutation and Combination averages 4.1 out of 5 from 13 ratings, while IntroStat averages 4.9 from 24 ratings.

### Do Permutation and Combination or IntroStat have ads?

IntroStat shows ads; Permutation and Combination does not.

### Which is updated more often, Permutation and Combination or IntroStat?

Permutation and Combination ships an update every 40 months, and IntroStat every 3 months. Most recently, Permutation and Combination was updated on September 10, 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.*