Comparison

Correct Prepositions vs Moby Thesaurus

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Correct Prepositions

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
Read full description

This app provides study materials and learning tools to help you learn how to use correct prepositions. In English, a preposition can combine with a noun, adjective or verb to form a collocation. The authors have given a very complete list of common collocations of a noun, adjective or verb with prepositions and detail explanation of how to correctly use prepositions. In addition, sample sentences are added to illustrate each usage. Do you know what is the difference between “abound in” and “abound with”? When do we use “advocate of” instead of “advocate for”? Do you know which preposition go with adjective “contiguous”? This app will help you to learn how to choose prepositions correctly. We hope you enjoy this valuable work. ● units - entries are divided into units - use cards to study ● notes - write note for each entry ● basic features: - search feature - bookmark feature - built-in dictionary: long press a word to look up ● If you want to give feedback, please use the feedback feature in the settings

About

Moby Thesaurus

Features
Read full description

This app provides Moby thesaurus, extended version. The thesaurus contains 30,260 root words, with 2,520,264 synonyms and related terms – an average of 83.3 per root word. Each line consists of a list of comma-separated values, with the first term being the root word, and all following words being related terms. The thesaurus is considered the largest thesaurus of the English language. ● Thesaurus - 30260 entries including words, phrasal verbs, phrases, etc. - 2,520,264 synonyms and related terms - Built-in dictionary: long-press a word and tap "Define" - Translation: long-press a word and tap "translate" - Pronunciation: long-press a word and tap "pronounce" ● Lists - Create a list - Add entry into a list - Review entries in a list using flashcards ● Study - Learn 30 entries daily - Multiple choice quizzes - Flashcards ● Basic features: - Search feature: search by entry or by synonyms - Voice search - Bookmark feature - Built-in dictionary - Share an entry - Copy an entry

Screenshots

Correct Prepositions4 screens
Moby Thesaurus4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 9 level
Correct Prepositions versus Moby Thesaurus: the parameters behind the verdict, then further details
ParameterCorrect PrepositionsMoby Thesaurus
Price$0.99 — better$1.99
Rating3.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 43 monthsEvery 41 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.011.0 — better
Further details — not scored
Size79 MB113 MB
Age rating4+4+
DeveloperHuong NguyenThuy Duong

In-app purchases

None

Correct Prepositions

No in-app purchases

None

Moby Thesaurus

No in-app purchases

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.

Other comparisons