# Correct Prepositions vs Moby Thesaurus

The clearest difference is price: Correct Prepositions at $0.99 against Moby Thesaurus's $1.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Correct Prepositions costs $0.99 and Moby Thesaurus $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Correct Prepositions ships an update every 43 months, Moby Thesaurus every 41 months. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Correct Prepositions | Moby Thesaurus |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/correct-prepositions/id1434416934/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 43 months | **Every 41 months** |
| Monetization | Paid | — |
| Size | 79 MB | 113 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Huong Nguyen](https://appshunter.io/developer/1342162705) | [Thuy Duong](https://appshunter.io/developer/1233559314) |

## What reviewers say

### Correct Prepositions

[App page](https://appshunter.io/ios/app/correct-prepositions/id1434416934)

Learn English prepositions with study materials, collocations, and example sentences. Features include units, notes, search, and a built-in dictionary to master correct preposition usage.

**Highlights:** Study materials for prepositions, Common collocations with nouns, adjectives, verbs, Detailed usage explanations, Sample sentences for illustration, Entries divided into units, Flashcard study method, Note-taking feature, Built-in dictionary

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

**In-app purchases:** none


### Moby Thesaurus

[App page](https://appshunter.io/ios/app/moby-thesaurus-extended/id1531115545)

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

**In-app purchases:** none


## Frequently asked questions

### Is Correct Prepositions free?

Correct Prepositions costs $0.99, with no in-app purchases.

### Is Moby Thesaurus free?

Moby Thesaurus costs $1.99, with no in-app purchases.

### Do Correct Prepositions or Moby Thesaurus have ads?

Neither Correct Prepositions nor Moby Thesaurus shows ads.

### Which is updated more often, Correct Prepositions or Moby Thesaurus?

Correct Prepositions ships an update every 43 months, and Moby Thesaurus every 41 months. Most recently, Correct Prepositions was updated on November 2, 2026 and Moby Thesaurus on November 7, 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.*