Probability vs ChatMate_
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Probability
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.
- Compute probabilities
- Determine percentiles
- Plot probability density function
- Plot probability mass function
- Supports 10+ continuous distributions
- Supports 5+ discrete distributions
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Replace your statistical tables with an interactive, graphical app! Compute probabilities & percentiles, and plot the probability density/mass function for the normal (Gaussian), t, chi-square, F, exponential, gamma, beta, log-normal, and Uniform, binomial, geometric (2 versions), hypergeometric, Poisson, and negative binomial (2 versions) distributions. Now supports Español.
ChatMate_
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.
- AI-powered chatbot
- Homework assistance
- Casual conversation
- Personalized recommendations
- User-friendly interface
- Mobile accessibility
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Introducing ChatMate, the mobile app that allows you to carry an AI-powered chatbot in your pocket. ChatMate is built on advanced technology and is trained on a vast amount of data to provide you with accurate and reliable responses to your queries. Whether you need help with homework, want to have a casual conversation or need recommendations, ChatMate is here to assist you. With its user-friendly interface, you can chat with ChatMate anytime and anywhere on your mobile device. Download ChatMate today and experience the power of AI at your fingertips!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Probability | ChatMate_ |
|---|---|---|
| Price | $1.99 — better | $9.99 |
| Rating | 4.9 (193 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 97.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 193 — better | 3 |
| Update frequency | Every 3 months — better | Every 27 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 26.0 | 16.2 — better |
| Further details — not scored | ||
| Size | 7 MB | 3 MB |
| Age rating | 17+ | 4+ |
| Developer | Matthew Bognar | Beyond Confident Labs LLC |
Customer experience
Probability
ChatMate_
Bugs and requests
Probability
Requested features
7 requests- 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
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- Add options after graph rendering (area above, between, outside values)
- Consistent terms for df across distributions
ChatMate_
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Probability
No in-app purchases
ChatMate_
No in-app purchases
Questions
Is Probability free?
Is ChatMate_ free?
Which has better reviews, Probability or ChatMate_?
Do Probability or ChatMate_ have ads?
Which is updated more often, Probability or ChatMate_?
Other comparisons
