# Probability vs ChatMate_

The clearest difference is price: Probability at $1.99 against ChatMate_'s $9.99. Probability also leads on update cadence (every 3 months vs every 27 months) and ratings volume (193 vs 3). ChatMate_'s advantage is iOS requirement (16.2 vs 26.0). On rating, review sentiment, ads and in-app purchases there is nothing between them.

Probability costs $1.99 and ChatMate_ $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for Probability against 5.0 for ChatMate_. That said, the two scores are not equally well evidenced: Probability has 193 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 97% of Probability's written reviews are positive against 100% of ChatMate_'s.

Probability ships an update every 3 months, ChatMate_ every 27 months. The most recent releases landed on October 13, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Probability | ChatMate_ |
| --- | --- | --- |
| Price | **$1.99** | $9.99 |
| Rating | [4.9 (193 ratings)](https://appshunter.io/ios/app/probability-distributions/id889106396/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/chatmate/id6449012376/reviews)** |
| Number of ratings | **193** | 3 |
| Positive reviews | 97.2% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 27 months |
| Monetization | **Free** | Paid |
| Best chart rank | **#175** | — |
| Size | 7 MB | 3 MB |
| Requires iOS | 26.0 | **16.2** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Matthew Bognar](https://appshunter.io/developer/889106399) | [Beyond Confident Labs LLC](https://appshunter.io/developer/1079292911) |

## What reviewers say

### Probability

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

**Currently charting:** #175 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


### ChatMate_

[App page](https://appshunter.io/ios/app/chatmate/id6449012376)

Engage in intelligent conversations with an AI chatbot on your mobile device. Get assistance with homework, casual chats, and recommendations through a user-friendly interface. Experience the power of advanced AI anytime, anywhere.

**Highlights:** AI-powered chatbot, Homework assistance, Casual conversation, Personalized recommendations, User-friendly interface, Mobile accessibility

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Probability free?

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

### Is ChatMate_ free?

ChatMate_ costs $9.99, with no in-app purchases.

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

ChatMate_ is rated higher. Probability averages 4.9 out of 5 from 193 ratings, while ChatMate_ averages 5.0 from 3 ratings.

### Do Probability or ChatMate_ have ads?

Neither Probability nor ChatMate_ shows ads.

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

Probability ships an update every 3 months, and ChatMate_ every 27 months. Most recently, Probability was updated on October 13, 2026 and ChatMate_ on September 28, 2026.

---

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