# Probability vs Probability Distribution

The clearest difference is review sentiment: Probability at 97% against Probability Distribution's 33%. Probability also leads on in-app purchases (none vs 1) and rating (4.9 vs 4.5). Probability Distribution's advantage is price (Free vs $1.99) and update cadence (every 2 weeks vs every 3 months). On ads and device support there is nothing between them.

Probability Distribution is free to download; Probability costs $1.99 up front. Probability Distribution sells 1 one-off in-app purchase. Probability asks for nothing beyond the download.

Probability holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: Probability has 193 ratings behind it against 15, 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 33% of Probability Distribution's.

Probability ships an update every 3 months, Probability Distribution every 2 weeks. The most recent releases landed on September 23, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Probability | Probability Distribution |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.9 (193 ratings)](https://appshunter.io/ios/app/probability-distributions/id889106396/reviews)** | [4.5 (15 ratings)](https://appshunter.io/ios/app/probability-distribution/id6447695305/reviews) |
| Number of ratings | **193** | 15 |
| Positive reviews | **97.2% of reviews** | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | **Free** | Paid |
| Best chart rank | **#34** | — |
| Size | 2 MB | 7 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Matthew Bognar](https://appshunter.io/developer/889106399) | [Madiyar Aitbayev](https://appshunter.io/developer/1229466587) |

## What reviewers say

### Probability

[App page](https://appshunter.io/ios/app/probability-distributions/id889106396)

**Currently charting:** #34 Top Paid · Education (US App Store)

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:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use interface
- 📊 Great for probability distributions
- 💡 Useful for checking work and homework
- 💰 Free advanced functions
- 📈 Visualizes data and distributions

**What reviewers complain about**

- 🚫 Not allowed on some exams
- 🤔 Some users want more features

**Requested features**

- 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


### Probability Distribution

[App page](https://appshunter.io/ios/app/probability-distribution/id6447695305)

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.

**Highlights:** Calculate probabilities, Visualize distributions, Normal (Gaussian) distribution, Binomial distribution, Poisson distribution, Exponential distribution

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Distributions | $2.99 | one-time |


## Frequently asked questions

### Is Probability free?

Probability costs $1.99, with no in-app purchases.

### Is Probability Distribution free?

Probability Distribution is free to download, with in-app purchases available.

### Which has better reviews, Probability or Probability Distribution?

Probability is rated higher. Probability averages 4.9 out of 5 from 193 ratings, while Probability Distribution averages 4.5 from 15 ratings.

### Do Probability or Probability Distribution have ads?

Neither Probability nor Probability Distribution shows ads.

### Which is updated more often, Probability or Probability Distribution?

Probability ships an update every 3 months, and Probability Distribution every 2 weeks. Most recently, Probability was updated on September 23, 2026 and Probability Distribution on September 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*