Comparison

American Heritage® Dictionary vs Collins Dictionary+Thesaurus

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

Head to head
About

American Heritage® Dictionary

Access a comprehensive digital dictionary with nearly 300,000 terms and thousands of sound files. Features include advanced search, etymology, and AI-powered tools for deeper understanding and language learning.

Highlights
  • Full dictionary text
  • 33,000+ example sentences
  • 64,000+ recorded sound files
  • Three-way cross-referencing search
  • Etymology with root links
  • AI Teacher for ESL students
  • Offline use
Features
Read full description

*NOTE: there is a newer version of American Heritage® Dictionary available on the AppStore. Tap on the "Enfour, Inc." link for AHD5. The entire 2,074 page, 7.5 pound dictionary with its nearly 300,000 terms –plus 64 thousand recorded sound files by native speakers -all available instantly at your fingertips. ________________________________________ "In the battle of the Big Three dictionaries, American Heritage® stands out on iPhone" (4 mice) — MacWorld ________________________________________ More than 33,000 written examples, totaling 4,222,000 words, makes this largest mobile dictionary on ANY platform The indexes alone are larger than most brand-name dictionaries. Even without the sound files, AHD would still be the largest dictionary in the AppStore. Main Features: ● the entire text of this best selling book ● complete front matter and appendices ● three-way cross-referencing search ● real-time progressive look-up ● wildcard pattern searches (with * ?) ● spelling suggestion dictionary included ● internal hyperlinking & supports copy/paste ● pop-up pronunciation symbols chart ● IPA pronunciation symbol conversion ● etymology (word history) with root links ● professionally recorded sound files ● zoomable graphics ● fallback online search for esoteric or archaic words and the latest slang ● unique two-way external application interaction — first iPhone dictionary with external linking and now most advanced! ● bookmarks with editable notations ● automatic search history ● an "AI Teacher" for deeper explanations or help for ESL students in 98 languages ● AI boosted anagram generator ● "Today" & LockScreen widgets ● 3D Touch support ● DarkMode support ● Siri support ● iPad multi-screen and Drag & Drop ● iPhone 18 & iOS27 support ● iPhone, iPod, iPad and macOS support ● complete offline use - no Internet connection The renowned American Heritage® Usage Panel, a group of more than 200 distinguished writers, scholars, and scientists, offers advice on problems of grammar and style; engaging notes explain word histories and clarify differences among synonyms; thousands of quotations and example sentences show words in context; and elegant definitions are enhanced by numerous full-color photographs, drawings, and maps, making this one of the most complete reference tool available on any mobile platform. Reviews for the application: "As apps go, only Enfour’s American Heritage® Dictionary stands out for its graphic appeal and functionality. Although I was pleased to have so much lexical firepower in such a compact form, I was annoyed at how poorly the other dictionaries present on the platform." (4 mice) — MacWorld Editor's Choice. ranking = "Great" — MacLife Reviews of the print version: "The Best Dictionary...Designed to appeal to the eye as well as the mind, it is notable for its imaginative illustrations....This is a great family dictionary, and ideal for schoolrooms." — The Courier Journal "This dictionary, now in its fourth edition, makes it fun to look up definitions of words....This up-to-date and eminently useful dictionary features a fabulous full-color design that quickly and effectively guides users to the information they seek." — Library Journal ________________________________________ The American Heritage® Dictionary of the English Language, Fourth Edition published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. http://www.hmco.com ________________________________________ Powered by Enfour's "UniDict® Engine 18" —thesaurus links work with these products: "Roget's II: New Thesaurus" "Companion Thesaurus" "Companion Synonyms" and many more

About

Collins Dictionary+Thesaurus

Access a comprehensive English dictionary and thesaurus with over 722,000 words, meanings, and phrases, plus 410,000 synonyms and antonyms. This offline app includes pronunciation audio, usage notes, etymologies, and specialized vocabulary for writers, students, and word game enthusiasts.

Highlights
  • Extensive vocabulary (722k+ words, 410k+ synonyms)
  • Offline access with pronunciation audio
  • Crossword and Scrabble solver features
  • Latest words and technical vocabulary
  • Usage notes and etymologies
  • Search within entries and definitions
  • Custom actions for use in other apps
Features
Read full description

The new 2014 Collins English Dictionary and Thesaurus app is fast, easy-to-use, has all the latest words, and is the most comprehensive and trustworthy combined English Dictionary and Thesaurus available on iOS. It contains more than 722,000 words, meanings and phrases and 410,000 synonyms and antonyms reflecting the rapid evolution and growth of modern English. No internet connection is required. Pronunciation audio available offline. For more than a century, Collins’ editors have worked to create dictionaries that meet the needs of the world they define. They’re still doing so today, tracking language change around the world and vetting suggestions from the public on collinsdictionary.com, ensuring Collins English Dictionary and Thesaurus truly is the home of living language. With all of the latest words to enter the English language as well as over 8,500 place names and 5,500 biographies you have thousands of fascinating facts and figures at your fingertips. Usage notes give advice on using the right word in the right place, and thousands of etymologies trace the roots of modern English. *More than 722,000 words, meanings and phrases *Over 410,000 synonyms and antonyms *Pronunciation audio available *Literary and rare words useful for crossword solvers and setters as well as Scrabble players *Includes the latest new words and extensive coverage of scientific and technical vocabulary *Over 8,500 place names and 5,500 biographies *Full appendixes of the Collins English Dictionary (The Joy of Dictionaries by best-selling author Mark Forsyth, Guide to Using the Dictionary, Pronunciation Guide and Abbreviations) *No internet connection required Search features include: -Alphabetical listing -Spelling suggestions -Linked Dictionary and Thesaurus -Anagrams -Fast pattern-match search (*, ?, vowel, consonant and group of letters) for crossword solving -Customize search options (starts/ends with, appears in idioms/examples) -Search within entries, definitions and examples -‘Jump’ feature – touch any word anywhere in the dictionary to go to the definition -Custom action feature allows users to look up a word in the dictionary from within other applications -Bookmark and history functions

Screenshots

American Heritage® Dictionary4 screens
Collins Dictionary+Thesaurus4 screens

Verdict

The call

The clearest difference is rating: American Heritage® Dictionary at 4.7 against Collins Dictionary+Thesaurus's 3.9. American Heritage® Dictionary also leads on ratings volume (207 vs 15) and update cadence (every 2 months vs every 6 months). Collins Dictionary+Thesaurus's advantage is price ($6.99 vs $12.99) and iOS requirement (13.0 vs 15.0). On review sentiment, ads, in-app purchases and monetization model 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

American Heritage® Dictionary costs $12.99 and Collins Dictionary+Thesaurus $6.99 up front. American Heritage® Dictionary sells 1 one-off in-app purchase and Collins Dictionary+Thesaurus sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

American Heritage® Dictionary holds the better App Store score, 4.7 against 3.9. That said, the two scores are not equally well evidenced: American Heritage® Dictionary has 207 ratings behind it against 15, so its average is the more settled of the two. Written reviews complicate that: 66% of American Heritage® Dictionary's written reviews are positive against 72% of Collins Dictionary+Thesaurus's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

American Heritage® Dictionary ships an update every 2 months, Collins Dictionary+Thesaurus every 6 months. Both last shipped on October 29, 2026.

Scorecard5 real differences · 5 level
American Heritage® Dictionary versus Collins Dictionary+Thesaurus: the parameters behind the verdict, then further details
ParameterAmerican Heritage® DictionaryCollins Dictionary+Thesaurus
Price$12.99$6.99 — better
Rating4.7 (207 ratings) — better3.9 (15 ratings)
Positive reviews65.6% of reviews72.0% of reviews — better
Number of ratings207 — better15
Update frequencyEvery 2 months — betterEvery 6 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size386 MB429 MB
Age rating9+4+
DeveloperEnfour, Inc.HarperCollins Publishers Ltd

Customer experience

American Heritage® Dictionary

All ratings204 ratings
Positive94.6%
Neutral1.0%
Negative4.4%
Written reviews157 reviews
Positive65.6%
Neutral7.0%
Negative27.4%

Collins Dictionary+Thesaurus

All ratings15 ratings
Positive66.7%
Neutral6.7%
Negative26.7%
Written reviews50 reviews
Positive72.0%
Neutral4.0%
Negative24.0%

Bugs and requests

American Heritage® Dictionary

Reported bugs

3 issues
  • Compatibility issues with newer iOS versions
  • Unreliable audio playback
  • Unexpected behavior when clearing search history

Requested features

5 requests
  • Ability to bookmark words and organize them into custom categories
  • Improved search functionality (e.g. tapping words in definitions to jump to them)
  • Landscape mode support
  • Better sync/backup options for user data
  • More visual aids and illustrations

Collins Dictionary+Thesaurus

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

American Heritage® Dictionary

One-time1
  • Roget's II Thesaurus$4.99
1 purchases

Collins Dictionary+Thesaurus

One-time1
  • Headword Audio PackFree

Questions

Is American Heritage® Dictionary free?
American Heritage® Dictionary costs $12.99, and also offers in-app purchases.
Is Collins Dictionary+Thesaurus free?
Collins Dictionary+Thesaurus costs $6.99, and also offers in-app purchases.
Which has better reviews, American Heritage® Dictionary or Collins Dictionary+Thesaurus?
American Heritage® Dictionary is rated higher. American Heritage® Dictionary averages 4.7 out of 5 from 207 ratings, while Collins Dictionary+Thesaurus averages 3.9 from 15 ratings.
Do American Heritage® Dictionary or Collins Dictionary+Thesaurus have ads?
Neither American Heritage® Dictionary nor Collins Dictionary+Thesaurus shows ads.
Which is updated more often, American Heritage® Dictionary or Collins Dictionary+Thesaurus?
American Heritage® Dictionary ships an update every 2 months, and Collins Dictionary+Thesaurus every 6 months. Most recently, American Heritage® Dictionary was updated on October 29, 2026 and Collins Dictionary+Thesaurus on October 29, 2026.

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