# CASIO fx vs Probability Distribution

The clearest difference is rating: Probability Distribution at 4.5 against CASIO fx's 2.7. Probability Distribution also leads on update cadence (every 2 weeks vs every 6 months). CASIO fx's advantage is monetization model (free with in-app purchases vs paid) and iOS requirement (12.0 vs 16.0). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. CASIO fx sells 1 in-app purchase, starting at $1.99 per month and Probability Distribution sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Probability Distribution holds the better App Store score, 4.5 against 2.7. Both are backed by a comparable volume of ratings — 9 and 15 respectively. Written reviews split almost evenly too, at 33% and 33% positive.

CASIO fx ships an update every 6 months, Probability Distribution every 2 weeks. The most recent releases landed on June 10, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | CASIO fx | Probability Distribution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (9 ratings)](https://appshunter.io/ios/app/casio-fx-cg500/id1256306989/reviews) | **[4.5 (15 ratings)](https://appshunter.io/ios/app/probability-distribution/id6447695305/reviews)** |
| Number of ratings | 9 | **15** |
| Positive reviews | 33.3% of reviews | 33.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 54 MB | 7 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CASIO COMPUTER CO., LTD.](https://appshunter.io/developer/456569836) | [Madiyar Aitbayev](https://appshunter.io/developer/1229466587) |

## What reviewers say

### CASIO fx

[App page](https://appshunter.io/ios/app/casio-fx-cg500/id1256306989)

This app provides advanced mathematical and scientific calculation tools, including graphing and a computer algebra system. It offers a user interface similar to the handheld fx-CG500, with access to various applications like eActivity, Spreadsheet, Geometry, and Physium. It's designed to enhance learning for both new and experienced users.

**Highlights:** Complex calculations, Graph drawing, Computer Algebra System (CAS), eActivity for worksheets, Spreadsheet with statistical analysis, Geometry with animations, Physium periodic table and constants

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| fx-CG500 1 Month Subscription | $1.99 | per month |


### Probability Distribution

[App page](https://appshunter.io/ios/app/probability-distribution/id6447695305)

This app allows users to calculate probabilities and visualize various continuous and discrete probability distributions. It supports a wide range of common distributions and plans to add more in the future.

**Highlights:** Calculate probabilities, Visualize distributions, Normal (Gaussian) distribution, Binomial distribution, Poisson distribution, Exponential distribution

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Distributions | $2.99 | one-time |


## Frequently asked questions

### Is CASIO fx free?

CASIO fx is free to download, with in-app purchases available.

### Is Probability Distribution free?

Probability Distribution is free to download, with in-app purchases available.

### Which has better reviews, CASIO fx or Probability Distribution?

Probability Distribution is rated higher. CASIO fx averages 2.7 out of 5 from 9 ratings, while Probability Distribution averages 4.5 from 15 ratings.

### Do CASIO fx or Probability Distribution have ads?

Neither CASIO fx nor Probability Distribution shows ads.

### Which is updated more often, CASIO fx or Probability Distribution?

CASIO fx ships an update every 6 months, and Probability Distribution every 2 weeks. Most recently, CASIO fx was updated on June 10, 2026 and Probability Distribution on September 9, 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.*