# OONI Probe vs Donate Books

The clearest difference is rating: OONI Probe at 4.5 against Donate Books's 4.0. OONI Probe also leads on ratings volume (91 vs 7) and update cadence (every 2 months vs every 4 months). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

OONI Probe holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: OONI Probe has 91 ratings behind it against 7, so its average is the more settled of the two. Written reviews complicate that: 58% of OONI Probe's written reviews are positive against 60% of Donate Books's, so the app with the better star average is not the one people write more warmly about.

OONI Probe ships an update every 2 months, Donate Books every 4 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | OONI Probe | Donate Books |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (91 ratings)](https://appshunter.io/ios/app/ooni-probe/id1199566366/reviews)** | [4.0 (7 ratings)](https://appshunter.io/ios/app/donate-books/id1668658774/reviews) |
| Number of ratings | **91** | 7 |
| Positive reviews | 58.1% of reviews | **60.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 139 MB | 54 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Tor Project](https://appshunter.io/developer/1199566365) | [Internet Archive](https://appshunter.io/developer/1197048903) |

## What reviewers say

### OONI Probe

[App page](https://appshunter.io/ios/app/ooni-probe/id1199566366)

This app helps you detect internet censorship and surveillance systems by examining website and app blocking. It also measures your network's speed and performance, providing data that can serve as evidence of interference. All collected data is published openly to promote transparency.

**Highlights:** Examine website and app blocking, Measure network speed and performance, Detect censorship and surveillance systems, Collect evidence of internet censorship, Publish open network measurement data, Free and open source software

**Features:** Vision Pro support

**In-app purchases:** none


### Donate Books

[App page](https://appshunter.io/ios/app/donate-books/id1668658774)

This app helps you identify which books from your collection are wanted by the Internet Archive for preservation and digitization. Scan book barcodes or printed identifiers using your phone's camera to receive immediate feedback on whether to donate.

**Highlights:** Scan book barcodes, OCR printed identifiers, Camera-based scanning, Preservation feedback, Digitization matching

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OONI Probe free?

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

### Is Donate Books free?

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

### Which has better reviews, OONI Probe or Donate Books?

OONI Probe is rated higher. OONI Probe averages 4.5 out of 5 from 91 ratings, while Donate Books averages 4.0 from 7 ratings.

### Do OONI Probe or Donate Books have ads?

Neither OONI Probe nor Donate Books shows ads.

### Which is updated more often, OONI Probe or Donate Books?

OONI Probe ships an update every 2 months, and Donate Books every 4 months. Most recently, OONI Probe was updated on October 26, 2026 and Donate Books on October 24, 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.*