Comparison

IntroStat vs Z

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Summary statistics calculation
  • Data visualization (boxplots, histograms)
  • Probability calculations
  • Hypothesis testing
  • Confidence intervals
  • Integrated statistics textbook
Features
Read 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

About

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.

Highlights
  • Comprehensive Z-score tables
  • Fast probability calculation
  • User-friendly interface
  • Educational tool for statistics
  • Reference for data analysis
Features
Read 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

IntroStat4 screens
Z4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
IntroStat versus Z: the parameters behind the verdict, then further details
ParameterIntroStatZ
PriceFree — better$2.99
Rating4.9 (24 ratings)5.0 (1 ratings) — better
Positive reviews92.3% of reviews100.0% of reviews — better
Number of ratings24 — better1
Update frequencyEvery 3 monthsEvery 6 weeks — better
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better12.0
Further details — not scored
Size38 MB32 MB
Age rating4+4+
DeveloperZhiyi ZhangJanoGroup LLC

Customer experience

IntroStat

All ratings24 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews13 reviews
Positive92.3%
Neutral0.0%
Negative7.7%

Z

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

IntroStat

One-time1
  • IntroStat Premium Features$4.99
None

Z

No in-app purchases

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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