# OONI Probe vs Simple Dict Mobile Pro

The clearest difference is price: OONI Probe at Free against Simple Dict Mobile Pro's $0.49. OONI Probe also leads on rating (4.5 vs 1.0) and ratings volume (91 vs 1). On update cadence, ads, in-app purchases and device support there is nothing between them.

OONI Probe is free to download; Simple Dict Mobile Pro costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

OONI Probe holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: OONI Probe has 91 ratings behind it against 1, so its average is the more settled of the two.

OONI Probe ships an update every 2 months, Simple Dict Mobile Pro every 5 weeks. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | OONI Probe | Simple Dict Mobile Pro |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| Rating | **[4.5 (91 ratings)](https://appshunter.io/ios/app/ooni-probe/id1199566366/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/simple-dict-mobile-pro/id6563146585/reviews) |
| Number of ratings | **91** | 1 |
| Positive reviews | 59.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | **Free** | Paid |
| Size | 139 MB | 36 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [The Tor Project](https://appshunter.io/developer/1199566365) | [培基 王](https://appshunter.io/developer/1579619014) |

## 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


### Simple Dict Mobile Pro

[App page](https://appshunter.io/ios/app/simple-dict-mobile-pro/id6563146585)

This app provides a fast and efficient offline dictionary experience, supporting various formats like zim, mdx, and dsl. It offers multiple search methods and a 'reading area' to save and track your lookups.

**Highlights:** Offline dictionary functionality, Supports zim, mdx, dsl formats, Keyword, regex, and fuzzy search, Reading area for saved entries, Lightweight and high-performance indexing

**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 Simple Dict Mobile Pro free?

Simple Dict Mobile Pro costs $0.49, with no in-app purchases.

### Which has better reviews, OONI Probe or Simple Dict Mobile Pro?

OONI Probe is rated higher. OONI Probe averages 4.5 out of 5 from 91 ratings, while Simple Dict Mobile Pro averages 1.0 from 1 ratings.

### Do OONI Probe or Simple Dict Mobile Pro have ads?

Neither OONI Probe nor Simple Dict Mobile Pro shows ads.

### Which is updated more often, OONI Probe or Simple Dict Mobile Pro?

OONI Probe ships an update every 2 months, and Simple Dict Mobile Pro every 5 weeks. Most recently, OONI Probe was updated on November 2, 2026 and Simple Dict Mobile Pro on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*