Probability vs StatsSims
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Compute probabilities
- Determine percentiles
- Plot probability density function
- Plot probability mass function
- Supports 10+ continuous distributions
- Supports 5+ discrete distributions
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Compute probabilities, determine percentiles, and plot the probability density function for the normal (Gaussian), t, chi-square, F, exponential, gamma, beta, log-normal, Pareto, and Weibull distributions. Compute probabilities, approximate percentiles, and plot the probability mass function for the binomial, geometric, hypergeometric, Poisson, and negative binomial distributions.
StatsSims
Explore statistical concepts with interactive simulations designed for introductory statistics courses. Covers topics from sampling to distributions, with more to come.
- Interactive statistical simulations
- Introductory statistics topics
- Sampling and distributions
- Confidence intervals
- Regression and correlation
- Future topic additions planned
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StatsPL Sims is a collection of easy-to-use, interactive simulations to explore statistics. StatsPL Sims was developed for College students taking an Intro to Stats (Stats 101) course, but is also suitable for high school students taking statistics. The following simulations are currently included: -Simple Random Sampling -Frequency Tables vs. Histograms -Histogram Explorer -Central Limit Theorem -Dice Roller -Confidence Intervals -Regression Line Game -Regression Line Explorer -Correlation Coefficient (R) -Normal Distribution -Binomial Distribution -Chi Square Distribution -F Distribution -T Distribution Over the next months, we will add more simulations on additional topics, such as: -One-sample t-test -Two-Sample t-test
Screenshots
Verdict
The clearest difference is review sentiment: Probability at 97% against StatsSims's 50%. Probability also leads on rating (4.9 vs 4.2) and ratings volume (193 vs 5). StatsSims's advantage is price (Free vs $1.99) and iOS requirement (6.0 vs 14.0). On update cadence, ads, in-app purchases and monetization model 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
StatsSims is free to download; Probability costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Probability holds the better App Store score, 4.9 against 4.2. That said, the two scores are not equally well evidenced: Probability has 193 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 97% of Probability's written reviews are positive against 50% of StatsSims's.
Probability ships an update every 3 months, StatsSims every 2 months. The most recent releases landed on September 27, 2026 and June 11, 2026 respectively.
| Parameter | Probability | StatsSims |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.9 (193 ratings) — better | 4.2 (5 ratings) |
| Positive reviews | 97.2% of reviews — better | 50.0% of reviews |
| Number of ratings | 193 — better | 5 |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 14.0 | 6.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 187 MB |
| Age rating | 17+ | 4+ |
| Developer | Matthew Bognar | New York University |
Customer experience
Probability
StatsSims
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
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- Add options after graph rendering (area above, between, outside values)
- Consistent terms for df across distributions
StatsSims
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Probability
No in-app purchases
StatsSims
No in-app purchases
Questions
Is Probability free?
Is StatsSims free?
Which has better reviews, Probability or StatsSims?
Do Probability or StatsSims have ads?
Which is updated more often, Probability or StatsSims?
Other comparisons
