# Preposition Builder Master Pro vs Slow Fluent

The clearest difference is price: Preposition Builder Master Pro at Free against Slow Fluent's $4.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Preposition Builder Master Pro is free to download; Slow Fluent costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Preposition Builder Master Pro ships an update every 2 months, Slow Fluent every 5 weeks. The most recent releases landed on October 9, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Preposition Builder Master Pro | Slow Fluent |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[3.8 (17 ratings)](https://appshunter.io/ios/app/preposition-builder-master-pro/id1236551326/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 45 MB | 2 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Imanol Fernandez Gorostizaga](https://appshunter.io/developer/313095639) | [Charlie Sendrowski](https://appshunter.io/developer/1568928933) |

## What reviewers say

### 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


### Slow Fluent

[App page](https://appshunter.io/ios/app/slow-fluent-learn-languages/id6790207655)

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

**In-app purchases:** none


## Frequently asked questions

### Is Preposition Builder Master Pro free?

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

### Is Slow Fluent free?

Slow Fluent costs $4.99, with no in-app purchases.

### Do Preposition Builder Master Pro or Slow Fluent have ads?

Neither Preposition Builder Master Pro nor Slow Fluent shows ads.

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

Preposition Builder Master Pro ships an update every 2 months, and Slow Fluent every 5 weeks. Most recently, Preposition Builder Master Pro was updated on October 9, 2026 and Slow Fluent on October 16, 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.*