# UCA vs Probability Distribution

The clearest difference is review sentiment: UCA at 100% against Probability Distribution's 33%. UCA also leads on in-app purchases (none vs 1). Probability Distribution's advantage is rating (4.5 vs 3.0) and ratings volume (17 vs 2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Probability Distribution sells 1 one-off in-app purchase. UCA asks for nothing beyond the download.

Probability Distribution holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: Probability Distribution has 17 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 100% of UCA's written reviews are positive against 33% of Probability Distribution's, so the app with the better star average is not the one people write more warmly about.

UCA ships an update every 3 weeks, Probability Distribution every 2 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | UCA | Probability Distribution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/uca/id1564464817/reviews) | **[4.5 (17 ratings)](https://appshunter.io/ios/app/probability-distribution/id6447695305/reviews)** |
| Number of ratings | 2 | **17** |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | **Free** | Paid |
| Size | 34 MB | 7 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Fundacion Universidad Catolica Argentina Santa Maria De Los Buenos Aires](https://appshunter.io/developer/1153605152) | [Madiyar Aitbayev](https://appshunter.io/developer/1229466587) |

## What reviewers say

### UCA

[App page](https://appshunter.io/ios/app/uca/id1564464817)

This app helps students, teachers, and the general public stay updated with university news. It allows students to view grades and register for courses and exams.

**Highlights:** View student grades, Register for courses, Register for exams, Stay updated on university news, Manage academic information

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 UCA free?

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

### Is Probability Distribution free?

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

### Which has better reviews, UCA or Probability Distribution?

Probability Distribution is rated higher. UCA averages 3.0 out of 5 from 2 ratings, while Probability Distribution averages 4.5 from 17 ratings.

### Do UCA or Probability Distribution have ads?

Neither UCA nor Probability Distribution shows ads.

### Which is updated more often, UCA or Probability Distribution?

UCA ships an update every 3 weeks, and Probability Distribution every 2 weeks. Most recently, UCA was updated on November 3, 2026 and Probability Distribution on November 3, 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.*