# Piazza vs CompositesAI

The clearest difference is review sentiment: CompositesAI at 100% against Piazza's 14%. CompositesAI also leads on rating (4.9 vs 2.1). Piazza's advantage is ads (none vs shown) and ratings volume (279 vs 17). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CompositesAI holds the better App Store score, 4.9 against 2.1. That said, the two scores are not equally well evidenced: Piazza has 279 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 14% of Piazza's written reviews are positive against 100% of CompositesAI's.

Piazza ships an update every 11 days, CompositesAI every 9 days. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Piazza | CompositesAI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (279 ratings)](https://appshunter.io/ios/app/piazza/id453142230/reviews) | **[4.9 (17 ratings)](https://appshunter.io/ios/app/compositesai/id1297825946/reviews)** |
| Number of ratings | **279** | 17 |
| Positive reviews | 14.2% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 days | **Every 9 days** |
| Monetization | **Free** | Ad-supported |
| Size | 3 MB | 45 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Piazza Technologies, Inc.](https://appshunter.io/developer/453142233) | [APPS BAY LIMITED](https://appshunter.io/developer/1599035519) |

## What reviewers say

### Piazza

[App page](https://appshunter.io/ios/app/piazza/id453142230)

This platform facilitates communication and learning for higher education. Students can ask and answer questions, while instructors can monitor student engagement. It provides real-time updates and a centralized space for class interactions.

**Highlights:** Ask and answer questions, Real-time updates, Centralized class communication, Student engagement monitoring, Mobile access for students and instructors

**In-app purchases:** none

**What reviewers like**

- 🚀 Useful app
- 🚀 Great for tracking classes
- 🚀 Convenient mobile access

**What reviewers complain about**

- 🐛 Crashes frequently
- 🐛 Buggy and unreliable
- 🐛 Lacks key features from web version
- 🐛 Poor user interface and navigation
- 🔒 Login and authentication issues

**Reported bugs**

- Inability to post or reply
- Randomly logs out users
- Fails to load posts and resources
- Incompatible with newer iOS versions

**Requested features**

- Dark mode option
- Ability to access course materials
- Improved formatting and editing tools
- Better organization of posts and discussions
- Seamless integration with web version


### CompositesAI

[App page](https://appshunter.io/ios/app/compositesai/id1297825946)

This AI-powered platform assists composites engineers by providing instant, expert-level answers to questions about material design, calculations, and process optimization. It offers a chat assistant for natural language queries and specialized tools for calculating various material properties and generating meshes.

**Highlights:** AI Chat Assistant for engineering queries, Calculate beam stiffness matrix, Calculate plate A, B, D matrices, Calculate solid stiffness matrix, Calculate coefficient of thermal expansions, Mesh generation with Gmsh

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Piazza free?

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

### Is CompositesAI free?

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

### Which has better reviews, Piazza or CompositesAI?

CompositesAI is rated higher. Piazza averages 2.1 out of 5 from 279 ratings, while CompositesAI averages 4.9 from 17 ratings.

### Do Piazza or CompositesAI have ads?

CompositesAI shows ads; Piazza does not.

### Which is updated more often, Piazza or CompositesAI?

Piazza ships an update every 11 days, and CompositesAI every 9 days. Most recently, Piazza was updated on October 14, 2026 and CompositesAI on October 11, 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.*