# Probability vs Thermonator

The clearest difference is price: Thermonator at Free against Probability's $1.99. Thermonator also leads on iOS requirement (10.0 vs 14.0). Probability's advantage is chart position (#55 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

Thermonator is free to download; Probability costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Probability ships an update every 3 months, Thermonator every 2 months. The most recent releases landed on September 23, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Probability | Thermonator |
| --- | --- | --- |
| 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 | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | — |
| Best chart rank | **#55** | — |
| Size | 2 MB | 118 MB |
| Requires iOS | 14.0 | **10.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Matthew Bognar](https://appshunter.io/developer/889106399) | [The Concord Consortium](https://appshunter.io/developer/890508659) |

## What reviewers say

### Probability

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

**Currently charting:** #55 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


### Thermonator

[App page](https://appshunter.io/ios/app/thermonator/id1347541327)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Probability free?

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

### Is Thermonator free?

Thermonator is free to download, with no in-app purchases.

### Do Probability or Thermonator have ads?

Neither Probability nor Thermonator shows ads.

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

Probability ships an update every 3 months, and Thermonator every 2 months. Most recently, Probability was updated on September 23, 2026 and Thermonator on September 15, 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.*