Comparison

Probability vs Probability Lab

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

Head to head
About

Probability

Calculate probabilities, find percentiles, and visualize probability density or mass functions for a wide range of continuous and discrete statistical distributions. Explore common distributions like normal, binomial, Poisson, and many more.

Highlights
  • Compute probabilities
  • Determine percentiles
  • Plot probability density function
  • Plot probability mass function
  • Supports 10+ continuous distributions
  • Supports 5+ discrete distributions
Features
Currently charting
Read full description

Replace your statistical tables with an interactive, graphical app! Compute probabilities & percentiles, and plot the probability density/mass function for the Beta, Chi-Square, Exponential, F, Gamma, Gumbel, Logistic, Lognormal, Normal, Pareto, t, Triangular, Uniform, Weibull, Binomial, Geometric (2 versions), Hypergeometric, Negative Binomial (2 versions), and Poisson distributions. Now supports Español.

About

Probability Lab

Explore probability distributions and statistical concepts with an interactive toolkit. Instantly compute functions and visualize distributions with real-time parameter adjustments. Ideal for students, educators, and learners of probability and statistics.

Highlights
  • 15+ continuous and discrete probability distributions
  • Compute PDF, PMF, CDF, inverse CDF
  • Interactive graphs with real-time parameter adjustment
  • Smooth, high-quality visualizations
  • Designed for students and educators
Features
Read full description

Probability Lab is an interactive toolkit for exploring probability distributions and statistical concepts. Choose from a wide range of continuous and discrete probability distributions, including the Normal, Binomial, Poisson, Beta, Gamma, Student's t, Chi-Square, and many more. Instantly compute probability density (PDF), cumulative distribution (CDF), inverse CDF (quantile), and other distribution functions with precise results. Visualize every distribution using smooth, interactive graphs. Adjust parameters in real time and watch the curve update instantly, making it easy to build intuition about how each parameter affects the distribution. Whether you're studying for a statistics course, teaching probability, or simply exploring mathematical concepts, Probability Lab provides a fast, intuitive, and beautiful way to understand probability distributions. **Features** • 15+ continuous and discrete probability distributions • Compute PDF, PMF, CDF, inverse CDF (quantile), and more • Interactive graphs with real-time parameter adjustment • Smooth, high-quality visualizations • Designed for students, educators, and anyone learning probability and statistics For questions or feedback, contact us anytime at chordstudio3572@outlook.com Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Probability4 screens
Probability Lab3 screens

Verdict

The call

The clearest difference is price: Probability Lab at Free against Probability's $1.99. Probability Lab also leads on device support (3 vs 1). Probability's advantage is in-app purchases (none vs 1) and ratings volume (193 vs 1). On rating, ads, monetization model and iOS requirement 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

Probability Lab is free to download; Probability costs $1.99 up front. Probability Lab sells 1 one-off in-app purchase. Probability 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 Probability against 5.0 for Probability Lab. That said, the two scores are not equally well evidenced: Probability has 193 ratings behind it against 1, so its average is the more settled of the two.

Scorecard5 real differences · 6 level
Probability versus Probability Lab: the parameters behind the verdict, then further details
ParameterProbabilityProbability Lab
Price$1.99Free — better
Rating4.9 (193 ratings)5.0 (1 ratings) — better
Positive reviews97.2% of reviews—
Number of ratings193 — better1
Update frequencyEvery 3 months—
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
Best chart rank#162 — better—
DevicesiPhoneiPhone, iPad, Mac — better
Requires iOS26.026.0
Further details — not scored
Size7 MB4 MB
Age rating17+4+
DeveloperMatthew BognarJin Zhang

Bugs and requests

Probability

Requested features

7 requests
  • Exam mode similar to Geogebra
  • Poisson distribution
  • Allow setting plot boundaries (e.g., for Beta distribution)
  • Make formulae available in offline mode
  • Clearly introduce parameters
Show 2 more
  • Add options after graph rendering (area above, between, outside values)
  • Consistent terms for df across distributions

Probability Lab

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Probability

No in-app purchases

1 purchases

Probability Lab

One-time1
  • Probability Lab Pro$9.99

Questions

Is Probability free?
Probability costs $1.99, with no in-app purchases.
Is Probability Lab free?
Probability Lab is free to download, with in-app purchases available.
Which has better reviews, Probability or Probability Lab?
Probability Lab is rated higher. Probability averages 4.9 out of 5 from 193 ratings, while Probability Lab averages 5.0 from 1 ratings.
Do Probability or Probability Lab have ads?
Neither Probability nor Probability Lab shows ads.

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