# OU Study vs Calibre Project

The clearest difference is in-app purchases: OU Study at none against Calibre Project's 1. OU Study also leads on iOS requirement (13.0 vs 15.2). Calibre Project's advantage is update cadence (every 6 weeks vs every 9 months). On price, ads and device support there is nothing between them.

Both are free to download. Calibre Project sells 1 one-off in-app purchase. OU Study asks for nothing beyond the download.

OU Study ships an update every 9 months, Calibre Project every 6 weeks. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | OU Study | Calibre Project |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (6 ratings)](https://appshunter.io/ios/app/ou-study/id1464171151/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 52 MB | 102 MB |
| Requires iOS | **13.0** | 15.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Open University](https://appshunter.io/developer/336747246) | [Fraction AS](https://appshunter.io/developer/1780522341) |

## What reviewers say

### OU Study

[App page](https://appshunter.io/ios/app/ou-study/id1464171151)

Enhance your mobile learning experience with access to module materials and a study planner. Download content for offline access, track key dates, and stay updated on forum messages. Designed for registered Open University students.

**Highlights:** Access module materials, Study planner, Offline downloads, Track key dates, Forum message notifications, Sync with module website

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

**In-app purchases:** none

**What reviewers like**

- 👍 User-friendly interface (when working)
- 🔋 Offline content download
- 💡 Planner easier to navigate
- 👍 Great add-on for on-the-go
- 👍 Convenient for catch-ups

**What reviewers complain about**

- 🐛 Slow loading times
- 🐛 Clunky and anti-user
- 🐛 Videos won't play
- 🐛 Links to external website
- 🐛 Forum not working

**Reported bugs**

- Cannot log in on original account
- Cannot sign up with new account
- Password cannot be based on a dictionary word
- App sends to mobile browser
- Videos just won't play

**Requested features**

- Add bookmark feature
- Improve accessibility for visually impaired
- Implement text zooming and font size options
- Add student home access
- Improve mobile layout optimization


### Calibre Project

[App page](https://appshunter.io/ios/app/calibre-project/id6738384352)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calibre Learning Kit | $299.99 | one-time |


## Frequently asked questions

### Is OU Study free?

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

### Is Calibre Project free?

Calibre Project is free to download, with in-app purchases available.

### Do OU Study or Calibre Project have ads?

Neither OU Study nor Calibre Project shows ads.

### Which is updated more often, OU Study or Calibre Project?

OU Study ships an update every 9 months, and Calibre Project every 6 weeks. Most recently, OU Study was updated on October 13, 2026 and Calibre Project on October 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.*