In probability and statistics, The Binomial Distribution is a frequency distribution of the possible number of successful outcomes in a given number of trials in each of which there is the same probability of success.

The Binomial Distribution summarizes the likelihood that a value will take one of two independent values under a given set of parameters or assumptions. The underlying assumptions of the binomial distribution are that there is only one outcome for each trial, that each trial has the same probability of success and that each trial is mutually exclusive.

For Data Entry the Binomial Distribution app for iPad and iPhone utilizes three Sliders to enter the Number of Trials, Number of Success and the Probability of Success variables. The range of the Number of Trials and Number of Successes is [1-20]. The range of the Probability of Success variable is [1.0-100.0] and is divided into 100 1.0 segments. After moving the Sliders to your selected values enter the Compute button.

The Binomial Distribution app graphs the Binomial Proability Density Function f(x) graph utilized the Normal Distribution Approximation to the Binomial Distribution curve. A Data Chart for the PDF values also exists.

What’s New

Version 1.7

Upgrade to iOS 15.0, watchOS8

Ratings and Reviews

1.8 out of 5
4 Ratings

4 Ratings

Smart Shopper ,

It Got Broke

Used to work on my iPad. Doesn’t anymore.

Iwantthatcard ,

Keep looking

Waste of time

Falsetap ,

Kinda of unusable..

Considering this is the first review for this app. I wouldn't want someone to not download it but, on an iPhone 6 and now 6s, you cannot actually input or see the probability. You can only slide a bar. It does have a screen with probabilities in .10 increments but, it would be nice to have an app to just plug in whatever number I want without tracking down my calculator. 4 stars until you ladies fix this.

App Privacy

The developer, Donald Schaefer, 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.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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