# Piazza vs Idemat

The clearest difference is rating: Idemat at 5.0 against Piazza's 2.1. Piazza's advantage is update cadence (every 11 days vs every 8 months) and ratings volume (279 vs 3). 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.

Idemat holds the better App Store score, 5.0 against 2.1. That said, the two scores are not equally well evidenced: Piazza has 279 ratings behind it against 3, so its average is the more settled of the two.

Piazza ships an update every 11 days, Idemat every 8 months. The most recent releases landed on October 14, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Piazza | Idemat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (279 ratings)](https://appshunter.io/ios/app/piazza/id453142230/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/idemat/id973292211/reviews)** |
| Number of ratings | **279** | 3 |
| Positive reviews | 14.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 8 months |
| Monetization | Free | Free |
| Size | 3 MB | 26 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) | [joost vogtlander](https://appshunter.io/developer/1117266085) |

## 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


### Idemat

[App page](https://appshunter.io/ios/app/idemat/id973292211)

This app helps designers assess the environmental impact of their material choices and processes. It provides extensive data on materials and processes to support sustainable product design, making life cycle assessment more accessible.

**Highlights:** Material and process environmental impact data, Eco-costs and carbon footprint assessment, Sustainable product design support, Life cycle assessment integration, Predefined end-of-life scenarios, Visual rankings and detail screens

**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 Idemat free?

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

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

Idemat is rated higher. Piazza averages 2.1 out of 5 from 279 ratings, while Idemat averages 5.0 from 3 ratings.

### Do Piazza or Idemat have ads?

Neither Piazza nor Idemat shows ads.

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

Piazza ships an update every 11 days, and Idemat every 8 months. Most recently, Piazza was updated on October 14, 2026 and Idemat on October 1, 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.*