IntroStat vs Probability Distribution
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
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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
Probability Distribution
This app allows users to calculate probabilities and visualize various continuous and discrete probability distributions. It supports a wide range of common distributions and plans to add more in the future.
- Calculate probabilities
- Visualize distributions
- Normal (Gaussian) distribution
- Binomial distribution
- Poisson distribution
- Exponential distribution
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Calculate probabilities and visualize probability distributions. Supported continuous probability distributions: - Normal (Gaussian) - t (Student's t) - Chi-Squared - F - Exponential - Gamma - Beta - Log-normal Supported discrete probability distributions: - Binomial - Poisson - Pascal - Geometric - Hypergeometric and more are coming.
Screenshots
Verdict
The clearest difference is review sentiment: IntroStat at 92% against Probability Distribution's 33%. IntroStat also leads on rating (4.9 vs 4.5) and monetization model (free with in-app purchases vs paid). Probability Distribution's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 3 months). On price, ratings volume, in-app purchases and device support 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
Both are free to download. IntroStat sells 1 one-off in-app purchase and Probability Distribution sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
IntroStat holds the better App Store score, 4.9 against 4.5. Both are backed by a comparable volume of ratings — 24 and 15 respectively. Written reviews point the same way: 92% of IntroStat's written reviews are positive against 33% of Probability Distribution's.
IntroStat ships an update every 3 months, Probability Distribution every 2 weeks. The most recent releases landed on September 18, 2026 and September 9, 2026 respectively.
| Parameter | IntroStat | Probability Distribution |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (24 ratings) — better | 4.5 (15 ratings) |
| Positive reviews | 92.3% of reviews — better | 33.3% of reviews |
| Number of ratings | 24 — better | 15 |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 38 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Zhiyi Zhang | Madiyar Aitbayev |
Customer experience
IntroStat
Probability Distribution
In-app purchases
IntroStat
- IntroStat Premium Features$4.99
Probability Distribution
- Unlock All Distributions$2.99
Questions
Is IntroStat free?
Is Probability Distribution free?
Which has better reviews, IntroStat or Probability Distribution?
Do IntroStat or Probability Distribution have ads?
Which is updated more often, IntroStat or Probability Distribution?
Other comparisons
