# OONI Probe vs Ultramo

The clearest difference is price: OONI Probe at Free against Ultramo's $0.99. OONI Probe also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On ads and in-app purchases there is nothing between them.

OONI Probe is free to download; Ultramo costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | OONI Probe | Ultramo |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.5 (88 ratings)](https://appshunter.io/ios/app/ooni-probe/id1199566366/reviews)** | — |
| Number of ratings | **88** | — |
| Positive reviews | 58.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free | — |
| Size | 139 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [The Tor Project](https://appshunter.io/developer/1199566365) | [丽 杨](https://appshunter.io/developer/1801631798) |

## 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


### Ultramo

[App page](https://appshunter.io/ios/app/ultramo/id6780856013)

**Features:** macOS Compatibility, 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 Ultramo free?

Ultramo costs $0.99, with no in-app purchases.

### Do OONI Probe or Ultramo have ads?

Neither OONI Probe nor Ultramo shows ads.

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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.*