# IntroStat vs Z

The clearest difference is price: IntroStat at Free against Z's $2.99. IntroStat also leads on ratings volume (24 vs 1). Z's advantage is in-app purchases (none vs 1). On rating, review sentiment, update cadence and ads there is nothing between them.

IntroStat is free to download; Z costs $2.99 up front. IntroStat sells 1 one-off in-app purchase. Z asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for IntroStat against 5.0 for Z. That said, the two scores are not equally well evidenced: IntroStat has 24 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 92% of IntroStat's written reviews are positive against 100% of Z's.

IntroStat ships an update every 3 months, Z every 6 weeks. The most recent releases landed on September 18, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | IntroStat | Z |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [4.9 (24 ratings)](https://appshunter.io/ios/app/introstat-statistics-solver/id1592602025/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/z-table-statistics/id6738610691/reviews)** |
| Number of ratings | **24** | 1 |
| Positive reviews | 92.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 38 MB | 32 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zhiyi Zhang](https://appshunter.io/developer/1592602327) | [JanoGroup LLC](https://appshunter.io/developer/1781461557) |

## What reviewers say

### 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 |


### Z

[App page](https://appshunter.io/ios/app/z-table-statistics/id6738610691)

This app provides a quick and easy way for students and professionals to look up Z-scores and calculate corresponding probabilities. It features comprehensive Z-score tables and a user-friendly interface for efficient statistical analysis.

**Highlights:** Comprehensive Z-score tables, Fast probability calculation, User-friendly interface, Educational tool for statistics, Reference for data analysis

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IntroStat free?

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

### Is Z free?

Z costs $2.99, with no in-app purchases.

### Which has better reviews, IntroStat or Z?

Z is rated higher. IntroStat averages 4.9 out of 5 from 24 ratings, while Z averages 5.0 from 1 ratings.

### Do IntroStat or Z have ads?

Both IntroStat and Z show ads.

### Which is updated more often, IntroStat or Z?

IntroStat ships an update every 3 months, and Z every 6 weeks. Most recently, IntroStat was updated on September 18, 2026 and Z on September 22, 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.*