# Probability vs Probability Lab

The clearest difference is price: Probability Lab at Free against Probability's $1.99. Probability's advantage is in-app purchases (none vs 1) and chart position (#34 vs unranked). On ads and device support there is nothing between them.

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.

## The numbers

| Metric | Probability | Probability Lab |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.9 (193 ratings)](https://appshunter.io/ios/app/probability-distributions/id889106396/reviews)** | — |
| Number of ratings | **193** | — |
| Positive reviews | 97.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free | — |
| Best chart rank | **#34** | — |
| Size | 2 MB | 4 MB |
| Requires iOS | **14.0** | 26.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Matthew Bognar](https://appshunter.io/developer/889106399) | [Jin Zhang](https://appshunter.io/developer/1830436291) |

## 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 Lab

[App page](https://appshunter.io/ios/app/probability-lab/id6794881706)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Probability Lab Pro | $9.99 | one-time |


## Frequently asked 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.

### Do Probability or Probability Lab have ads?

Neither Probability nor Probability Lab shows ads.

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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.*