# Probability vs MathWrite Notes

The clearest difference is price: MathWrite Notes at Free against Probability's $1.99. Probability's advantage is in-app purchases (none vs 2) and iOS requirement (14.0 vs 18.6). On ads and device support there is nothing between them.

MathWrite Notes is free to download; Probability costs $1.99 up front. MathWrite Notes sells 2 in-app purchases, starting at $9.99 per month. Probability asks for nothing beyond the download.

## The numbers

| Metric | Probability | MathWrite Notes |
| --- | --- | --- |
| 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 | — |
| Size | 2 MB | 35 MB |
| Requires iOS | **14.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Matthew Bognar](https://appshunter.io/developer/889106399) | [Andres Osorio Leyenda](https://appshunter.io/developer/6807434389) |

## What reviewers say

### Probability

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

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


### MathWrite Notes

[App page](https://appshunter.io/ios/app/mathwrite-notes/id6807434387)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MathWriteNotes Monthly Subscription | $9.99 | per month |
| MathWriteNotes Yearly Subscription | $39.99 | per year |


## Frequently asked questions

### Is Probability free?

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

### Is MathWrite Notes free?

MathWrite Notes is free to download, with in-app purchases available.

### Do Probability or MathWrite Notes have ads?

Neither Probability nor MathWrite Notes 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.*