Distributions
Touch the math. Study stats.
$4.99 · Designed for iPad. Not verified for macOS.
Drag curves, shade regions, and watch chance respond. Explore 41 distributions with on-device AI guidance—no accounts, no tracking.
Drag the curve. Shade a region. Watch probability respond.
Distributions is a modern statistics study tool for students, educators, and anyone who wants to feel how probability distributions behave—not just memorize formulas.
EXPLORE 41 DISTRIBUTIONS
Browse discrete and continuous families with interactive PDF/PMF and CDF charts, live parameter sliders, descriptive statistics, examples, and random sampling. Search, favorites, recents, and side-by-side comparison keep the catalog usable on iPhone and iPad.
TOUCH THE MATH
Drag parameters on the chart and see the shape move. Turn on Probability mode to shade continuous regions or select discrete values and read the probability instantly. Typeset formulas stay linked to the live parameters.
LEARN DEEPER
Practice with Guess-the-Distribution quizzes, walk a relationship map between families, look up a searchable glossary, and check live z, t, and χ² critical values—all offline.
ON-DEVICE AI (APPLE INTELLIGENCE)
Ask the Distribution Advisor to suggest a distribution from a scenario, tap Explain for contextual teaching prompts, and optionally mix AI-generated quiz questions. AI output is labeled and advisory; exact probabilities and quantiles always come from the app’s calculator. When Apple Intelligence is unavailable, Explain and quizzes use built-in content and the Advisor tells you why it’s unavailable—everything else works the same. No accounts. No tracking. No third-party AI services.
FIT MY DATA
Paste or import a dataset, estimate candidate distributions, rank goodness of fit, inspect histogram and Q–Q overlays, and export reports.
ONE-TIME PURCHASE
Distributions is a paid app. One purchase includes all 41 distributions, interactive charts, calculators, Fit My Data, saved parameter sets, every quiz mode, exports, and unlimited on-device Advisor use. No subscriptions. No in-app purchases. No ads.
Privacy-first by design: your exploration stays on your device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Version 2026.09.26 moves Distributions to a complete paid study tool: one purchase includes touch-driven charts, probability regions, Fit My Data, on-device Apple Intelligence (Advisor, explainers, quiz help), the Distribution of the Day widget, and a redesigned Learn tab with quizzes, map, glossary, and critical values.
The developer, Joao Frasco, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Joao Frasco
- Size
- 15.6 MB
- Category
- Education
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
English and 5 more
- English, French, German, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Copyright
- Copyright © 2026 Joao Frasco. All rights reserved.
