# PassFinder vs Preposition Builder Master Pro

The clearest difference is rating: Preposition Builder Master Pro at 3.8 against PassFinder's 3.1. Preposition Builder Master Pro also leads on iOS requirement (15.6 vs 18.0). PassFinder's advantage is review sentiment (39% vs 0%) and monetization model (free vs paid). On price, ratings volume, update cadence and ads there is nothing between them.

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

Preposition Builder Master Pro holds the better App Store score, 3.8 against 3.1. Both are backed by a comparable volume of ratings — 30 and 17 respectively. Written reviews complicate that: 39% of PassFinder's written reviews are positive against 0% of Preposition Builder Master Pro's, so the app with the better star average is not the one people write more warmly about.

PassFinder ships an update every 3 months, Preposition Builder Master Pro every 2 months. The most recent releases landed on September 28, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | PassFinder | Preposition Builder Master Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (30 ratings)](https://appshunter.io/ios/app/passfinder/id721125800/reviews) | **[3.8 (17 ratings)](https://appshunter.io/ios/app/preposition-builder-master-pro/id1236551326/reviews)** |
| Number of ratings | **30** | 17 |
| Positive reviews | **39.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Paid |
| Size | 5 MB | 45 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Christian Hansen](https://appshunter.io/developer/721033532) | [Imanol Fernandez Gorostizaga](https://appshunter.io/developer/313095639) |

## What reviewers say

### PassFinder

[App page](https://appshunter.io/ios/app/passfinder/id721125800)

Track the International Space Station's visible passes over your location. Receive precise timing information to observe the ISS with the naked eye.

**Highlights:** ISS pass tracking, Visible pass notifications, Naked-eye observation guidance, Location-based timing

**Features:** macOS Compatibility

**In-app purchases:** none


### Preposition Builder Master Pro

[App page](https://appshunter.io/ios/app/preposition-builder-master-pro/id1236551326)

Learn English prepositions and grammar by correctly placing words to form sentences and common sayings. This game offers multiple difficulty levels, from beginner to expert, and includes a fun way to master idioms and expressions. Compete with others or practice solo to improve your language skills.

**Highlights:** Sentence building with prepositions, Multiple difficulty levels (Beginner to Expert), Proverbs and Sayings level, Time penalties for errors, Scoring based on speed and accuracy, Online multiplayer mode, Game Center integration

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

**In-app purchases:** none


## Frequently asked questions

### Is PassFinder free?

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

### Is Preposition Builder Master Pro free?

Preposition Builder Master Pro is free to download, with no in-app purchases.

### Which has better reviews, PassFinder or Preposition Builder Master Pro?

Preposition Builder Master Pro is rated higher. PassFinder averages 3.1 out of 5 from 30 ratings, while Preposition Builder Master Pro averages 3.8 from 17 ratings.

### Do PassFinder or Preposition Builder Master Pro have ads?

Neither PassFinder nor Preposition Builder Master Pro shows ads.

### Which is updated more often, PassFinder or Preposition Builder Master Pro?

PassFinder ships an update every 3 months, and Preposition Builder Master Pro every 2 months. Most recently, PassFinder was updated on September 28, 2026 and Preposition Builder Master Pro on September 23, 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.*