IntroStat vs Z
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
IntroStat
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.
- Summary statistics calculation
- Data visualization (boxplots, histograms)
- Probability calculations
- Hypothesis testing
- Confidence intervals
- Integrated statistics textbook
Read full descriptionHide full description
IntroStat is a probability and statistics calculator. It is the perfect learning tool for an introductory statistics course. Use it to perform any of your statistics calculation needs. IntroStat also includes a statistics textbook complete with formulas, exercise problems, examples, and more. FREE IN THE CALCULATOR: • Enter & Save Datasets • Generate Summary Statistics • Calculate z-Scores • Draw Boxplots & Histograms • Visualize Key Concepts like The Empirical Formula • Plot Discrete and Continuous Random Variables • Perform Probability Calculations • Conduct Hypothesis Testing • Compute Confidence Intervals • Lookup Critical Values of Distributions • Perform Simple Regression Analysis • ANOVA, Chi-Square, & F-Tests • Introductory Statistics Textbook Upgrade as a Premium User to unlock: • Dark Mode • 12 Color Themes • Zoom • Custom Decimal Precision • Comma Display • No Ads Have any questions? Please reach out to us via email at IntroStatApp@gmail.com. End User Licensing Agreement: https://www.introstatapp.com/user-agreement Privacy Policy: https://www.introstatapp.com/privacy-policy
Z
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.
- Comprehensive Z-score tables
- Fast probability calculation
- User-friendly interface
- Educational tool for statistics
- Reference for data analysis
Read full descriptionHide full description
Z-Table is a simple and powerful tool designed to help students, statisticians, and professionals look up Z-scores and corresponding probabilities with ease. Whether you're studying for an exam or working on data analysis, this app provides an efficient way to calculate and reference Z-scores. Key Features: Comprehensive Z-Score Tables: Access both positive and negative Z-tables to quickly look up critical Z-scores. Fast Probability Calculation: Find left-tail and right-tail probabilities with ease. User-Friendly Interface: The clean and minimal design ensures you can get the values you need without distractions. Educational Tool: Ideal for statistics students or professionals who frequently work with normal distributions. Why Choose Z-Table? Z-Table is optimized for speed and ease of use. Whether you are working on statistical analysis, preparing for exams, or just need a quick reference, Z-Table is the perfect companion. No ads, no distractions—just reliable and accurate statistical data at your fingertips. Who is this app for? Statistics students and teachers Data analysts and researchers Professionals in need of quick statistical references Download Z-Table today and simplify your statistical analysis process!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | IntroStat | Z |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 4.9 (24 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 92.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 24 — better | 1 |
| Update frequency | Every 3 months | Every 6 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 38 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Zhiyi Zhang | JanoGroup LLC |
Customer experience
IntroStat
Z
In-app purchases
IntroStat
- IntroStat Premium Features$4.99
Z
No in-app purchases







