# Piazza vs Purdue CS

The clearest difference is review sentiment: Purdue CS at 100% against Piazza's 14%. Purdue CS also leads on rating (4.8 vs 2.1) and iOS requirement (13.0 vs 15.6). Piazza's advantage is update cadence (every 11 days vs every 4 months) and ratings volume (279 vs 13). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Purdue CS holds the better App Store score, 4.8 against 2.1. That said, the two scores are not equally well evidenced: Piazza has 279 ratings behind it against 13, 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 Purdue CS's.

Piazza ships an update every 11 days, Purdue CS every 4 months. The most recent releases landed on October 14, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Piazza | Purdue CS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (279 ratings)](https://appshunter.io/ios/app/piazza/id453142230/reviews) | **[4.8 (13 ratings)](https://appshunter.io/ios/app/purdue-cs/id1507701831/reviews)** |
| Number of ratings | **279** | 13 |
| Positive reviews | 14.2% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 4 months |
| Monetization | Free | Free |
| Size | 3 MB | 6 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Piazza Technologies, Inc.](https://appshunter.io/developer/453142233) | [Pallav Agarwal](https://appshunter.io/developer/1507701830) |

## 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


### Purdue CS

[App page](https://appshunter.io/ios/app/purdue-cs/id1507701831)

This app connects Computer Science students at Purdue University with events and resources. Follow student organizations, get event notifications, and view lab availability. It also provides access to department resources and opportunity updates.

**Highlights:** Follow CS student organizations, Receive event notifications, View Computer Science opportunity updates, Live lab availability view, Access common department resources

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

**In-app purchases:** none


## Frequently asked questions

### Is Piazza free?

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

### Is Purdue CS free?

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

### Which has better reviews, Piazza or Purdue CS?

Purdue CS is rated higher. Piazza averages 2.1 out of 5 from 279 ratings, while Purdue CS averages 4.8 from 13 ratings.

### Do Piazza or Purdue CS have ads?

Neither Piazza nor Purdue CS shows ads.

### Which is updated more often, Piazza or Purdue CS?

Piazza ships an update every 11 days, and Purdue CS every 4 months. Most recently, Piazza was updated on October 14, 2026 and Purdue CS on September 22, 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.*