Comparison

Deep Dictionary vs Liffer

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

Head to head
About

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.

Highlights
  • Multilingual definitions
  • Urban Dictionary slang integration
  • Wikipedia content access
  • Pronunciation guides and usage examples
  • Comprehensive thesaurus
  • Images and contextual phrases
Features
Read full description

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.

About

Liffer

Features
Read full description

Liffer is a reference library that lives on your phone. Download what you need once, then search, browse, and ask questions with no connection. There's no account to set up, no ads, and no tracking. EVERYTHING WORKS OFFLINE - Content packs are stored on your device, so they work in airplane mode, abroad, off-grid, or when the network is down - Fast full-text search across every pack you've installed - Semantic search that finds answers by meaning, not just matching words ON-DEVICE AI ASSISTANT (OPTIONAL) - Download a small AI model that runs on your phone - Ask questions in plain language and get answers based on your installed packs - It works with no connection, and nothing you ask is sent anywhere CONTENT PACKS - Medical Encyclopedia: first aid and health reference (free) - Wilderness Survival: shelter, water, fire, navigation (free) - Science, History, Geography, Astronomy, Mathematics and more with Liffer Pro LIFFER PRO One payment unlocks every content pack and unlimited AI questions. It's a single purchase, not a subscription, with no recurring fees. It restores on any device signed in to your Apple ID. YOUR DATA STAYS ON YOUR DEVICE Your reading history, bookmarks, and questions are kept on your phone. Liffer doesn't need an account and doesn't track you. Liffer gives you general reference information only. It is not a substitute for professional medical advice, diagnosis, or treatment. In an emergency, call your local emergency services.

Screenshots

Deep Dictionary4 screens
Liffer3 screens

Verdict

The call

The clearest difference is in-app purchases: Deep Dictionary at none against Liffer's 1. Liffer's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement 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

Both are free to download. Liffer sells 1 one-off in-app purchase. Deep Dictionary asks for nothing beyond the download.

UpkeepUpdate frequency

Deep Dictionary ships an update every 5 days, Liffer weekly. The most recent releases landed on September 27, 2026 and September 13, 2026 respectively.

Scorecard2 real differences · 8 level
Deep Dictionary versus Liffer: the parameters behind the verdict, then further details
ParameterDeep DictionaryLiffer
PriceFreeFree
Rating4.7 (51 ratings) — better—
Positive reviews77.8% of reviews—
Number of ratings51 — better—
Update frequencyEvery 5 days — betterWeekly
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhoneiPhone, iPod — better
Requires iOS16.015.1 — better
Further details — not scored
Size13 MB201 MB
Age rating12+17+
DeveloperDEEPCOVaidotas Sackus

In-app purchases

None

Deep Dictionary

No in-app purchases

1 purchases

Liffer

One-time1
  • Liffer Pro — Lifetime$17.99

Questions

Is Deep Dictionary free?
Deep Dictionary is free to download, with no in-app purchases.
Is Liffer free?
Liffer is free to download, with in-app purchases available.
Do Deep Dictionary or Liffer have ads?
Deep Dictionary shows ads; Liffer does not.
Which is updated more often, Deep Dictionary or Liffer?
Deep Dictionary ships an update every 5 days, and Liffer weekly. Most recently, Deep Dictionary was updated on September 27, 2026 and Liffer on September 13, 2026.

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