American Heritage® Dictionary vs Deep Dictionary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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*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 17 & iOS26 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 16" —thesaurus links work with these products: "Roget's II: New Thesaurus" "Companion Thesaurus" "Companion Synonyms" and many more
Deep Dictionary
Access definitions from various sources like Wikipedia and Urban Dictionary, with multilingual support and pronunciation guides. Enhance your vocabulary with synonyms, related words, and real-life usage examples.
- Multilingual definitions
- Urban Dictionary slang integration
- Wikipedia content access
- Pronunciation guides and usage examples
- Comprehensive thesaurus
- Images and contextual phrases
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Deep Dictionary is like Wikipedia, Urban Dictionary, Oxford English Dictionary, and Youglish all in one App! Deep Dictionary supports multiple languages! Get definitions in Japanese, Chinese, Russian, German, Spanish, and French alongside English. The best multilingual dictionary for learning and translation—perfect for English-Japanese dictionary, English-Chinese dictionary, English-Russian dictionary, English-German dictionary, English-Spanish dictionary, and English-French dictionary! With direct integration with Urban Dictionary, you'll never miss the latest slang and expressions. Our app ensures you stay updated with contemporary language trends, capturing the essence of the latest terms just like Urban Dictionary. Like YouGlish, our app offers pronunciation guides and real-life usage examples through integrated YouTube clips. Need scientific definitions? Our app connects you to comprehensive Wikipedia entries. For dictionary definitions, Deep Dictionary includes images and contextual phrases to make vocabulary building a breeze. Download now to enhance your vocabulary with the best of both traditional and contemporary language tools. Download the Deep Dictionary app for free and start your English learning right away. ## KEY FEATURES: ## Thesaurus: Deep Dictionary is more than just a dictionary—it's a comprehensive thesaurus at your fingertips. Unlike traditional thesaurus apps that focus solely on synonyms and antonyms, Deep Dictionary broadens your vocabulary with a wide range of related words that are more practical for everyday use. Whether you’re writing, studying, or simply want to expand your vocabulary, our thesaurus feature offers tools that go beyond just finding synonyms and antonyms. Discover new words and enhance your language skills with Deep Dictionary’s unique approach to the thesaurus! ## Wikipedia: Deep Dictionary includes direct references to authentic Wikipedia content, wrapped in an improved, user-friendly interface. Now you can access reliable Wikipedia information. Whether you’re a student, a professional, or simply curious, Deep Dictionary provides a seamless Wikipedia-like experience for all things related to words and their meanings. ## Reliable Sources: Looking for an alternative to Dictionary.com? Deep Dictionary provides everything you need, from detailed definitions to pronunciation guides, much like Dictionary.com. With features similar to Dictionary.com, Deep Dictionary helps you explore the English language with ease. If you love Dictionary.com, you'll find Deep Dictionary an equally valuable resource for learning and mastering English. And what's better? Deep Dictionary doesn't have Ads to interrupt your learning experience. ## Pick Up Slangs like Urban Dictionary: Stay updated with the latest trends in language. Our direct integration with Urban Dictionary ensures you’re never out of the loop with contemporary and evolving terms. When you prefer, jump over to the Urban Dictionary website to explore more with one simple tap! ## Best Youglish Alternative on iOS: iPhone users have long sought a good YouGlish substitute, and now you've found it! Deep Dictionary offers pronunciation guides and real-life usage examples. ## Academic: Inspired by the Oxford English Dictionary, Deep Dictionary offers a wealth of detailed definitions and historical contexts, just like the Oxford English Dictionary. Dive into the depths of the English language with a dictionary that mirrors the comprehensive nature of the Oxford English Dictionary. Whether you’re studying or just curious about words, our app provides the insights you need, much like the Oxford English Dictionary.
Screenshots
Verdict
The clearest difference is price: Deep Dictionary at Free against American Heritage® Dictionary's $12.99. Deep Dictionary also leads on in-app purchases (none vs 1) and update cadence (weekly vs every 2 months). American Heritage® Dictionary's advantage is ads (none vs shown) and device support (4 vs 1). On rating 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
Deep Dictionary is free to download; American Heritage® Dictionary costs $12.99 up front. American Heritage® Dictionary sells 1 one-off in-app purchase. Deep Dictionary asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for American Heritage® Dictionary against 4.7 for Deep Dictionary. Both are backed by a comparable volume of ratings — 199 and 51 respectively. Written reviews are what separate them: 66% of American Heritage® Dictionary's written reviews are positive against 78% of Deep Dictionary's.
American Heritage® Dictionary ships an update every 2 months, Deep Dictionary weekly. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.
| Parameter | American Heritage® Dictionary | Deep Dictionary |
|---|---|---|
| Price | $12.99 | Free — better |
| Rating | 4.7 (199 ratings) | 4.7 (51 ratings) |
| Positive reviews | 65.6% of reviews | 77.8% of reviews — better |
| Number of ratings | 199 — better | 51 |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 385 MB | 14 MB |
| Age rating | 9+ | 12+ |
| Developer | Enfour, Inc. | DEEPCO |
Customer experience
American Heritage® Dictionary
Deep Dictionary
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
Deep Dictionary
Not enough reviews yet to summarise bugs or requests.
In-app purchases
American Heritage® Dictionary
- Roget's II Thesaurus$4.99
Deep Dictionary
No in-app purchases
Questions
Is American Heritage® Dictionary free?
Is Deep Dictionary free?
Which has better reviews, American Heritage® Dictionary or Deep Dictionary?
Do American Heritage® Dictionary or Deep Dictionary have ads?
Which is updated more often, American Heritage® Dictionary or Deep Dictionary?
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