LEO Dictionary vs Thesaurus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LEO Dictionary
Access extensive language dictionaries with example sentences and audio pronunciations. Improve your vocabulary with a spaced repetition system and get help with language questions in community forums.
- Extensive multilingual dictionaries
- Audio pronunciation
- Vocabulary trainer with spaced repetition
- User-created wordlists
- Language learning forums
- Noun and verb tables
- Grammar and etymology
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This app offers free access to LEO's dictionaries, vocab trainer and forums. Are you in need of a reliable language reference? LEO’s comprehensive dictionaries include wide-ranging vocabulary, example sentences and audio pronunciation. Or would you like to take a foreign language to the next level? Why not try our vocab trainer with its tried-and-tested spaced repetition system. In LEOs Forum kannst du dir zudem Rat zu Sprachfragen holen, die über eine reine Wörterbuchfunktion hinausgehen. Our dictionaries contain around 2,944,000 entries and is being updated as you read this. * English ⇔ German (840,000 entries) * French ⇔ German (280,000 entries) * Spanish ⇔ German (261,000 entries) * Italian ⇔ German (258,000 entries) * Chinese ⇔ German (238,000 entries) * Russian ⇔ German (373,000 entries) * Portuguese ⇔ German (171,000 entries) * Polish ⇔ German (99,000 entries) * English ⇔ Spanish (232,000 entries) * Spanish ⇔ Portuguese (77,000 entries) * English ⇔ French (61,000 entries) * English ⇔ Russian (54,000 entries) With LEO you can do more than just look up the meaning of a word in a different language. LEO also provides: * noun and verb tables * real voice audio pronunciation (no speech synthesis) * definitions * grammar and etymology, as well as other information relevant to the search term(s) including * orthographically similar words * possible base forms for inflected words * links to forum discussions containing the search term(s) Vocabulary trainer Our free vorab trainer is the perfect companion to build your vocabulary – whether at school or on your holidays. All you need is a free user account and you’re good to start your learning journey. * Use our curated wordlists to practice vocabulary used in German textbooks at secondary schools * Learn words with LEO’s spaced repetition system * Create your own wordlists – be it for school, for professional contexts or for your holidays * Set your learning targets and learn at your own speed * Enhance your language skills with a sustainable approach * Collect as many words and phrases as you like – there is no word limit even in the free version of our app Forums The LEO Forum exists to provide a platform for language-related questions that are not answered in the dictionary. If you would like to get help from other users or contribute to questions yourself, you need to register a user account (free of charge). The app contains adverts which you can choose to remove by subscribing to our ad-free version. https://www.apple.com/legal/itunes/appstore/dev/stdeula You can find a detailed description of all of our services on our website https://www.leo.org
Thesaurus
Easily look up synonyms for German words. This app utilizes the open-source OpenThesaurus.de database, a collaborative German dictionary for synonyms.
- Synonym lookup
- German language support
- OpenThesaurus.de database
- Collaborative dictionary
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Einfach Synonyme nachschlagen. Basiert auf openthesaurus.de OpenThesaurus ist ein freies deutsches Wörterbuch für Synonyme, bei dem jeder mitmachen kann.
Screenshots
Verdict
The clearest difference is rating: LEO Dictionary at 4.0 against Thesaurus's 1.0. LEO Dictionary also leads on ratings volume (225 vs 1) and update cadence (every 3 weeks vs every 2 months). Thesaurus's advantage is in-app purchases (none vs 5) and ads (none vs shown). On price, 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
Both are free to download. LEO Dictionary sells 5 in-app purchases, starting at $7.49 per year. Thesaurus asks for nothing beyond the download.
LEO Dictionary holds the better App Store score, 4.0 against 1.0. That said, the two scores are not equally well evidenced: LEO Dictionary has 225 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 68% of LEO Dictionary's written reviews are positive against 100% of Thesaurus's, so the app with the better star average is not the one people write more warmly about.
LEO Dictionary ships an update every 3 weeks, Thesaurus every 2 months. The most recent releases landed on October 17, 2026 and September 20, 2026 respectively.
| Parameter | LEO Dictionary | Thesaurus |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (225 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 67.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 225 — better | 1 |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 40 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | LEO GmbH | Christian Meindl |
Customer experience
LEO Dictionary
Thesaurus
Bugs and requests
LEO Dictionary
Reported bugs
4 issues- Search function not working reliably
- App crashes when switching between languages
- Saved word lists not syncing across devices
- Inconsistent performance on older devices
Requested features
5 requests- Offline dictionary functionality
- Improved word list management and editing
- Customizable user interface and themes
- Enhanced verb conjugation and grammar tools
- Seamless integration with language learning apps
Thesaurus
Not enough reviews yet to summarise bugs or requests.
In-app purchases
LEO Dictionary
- Ad-free annual subscription$7.491 Year
- Westermann Camden Town 5$8.95
- Westermann Camden Town 6$8.95
- Westermann Camden Town 7$8.95
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- Westermann Camden Town 8$8.95
Thesaurus
No in-app purchases
Questions
Is LEO Dictionary free?
Is Thesaurus free?
Which has better reviews, LEO Dictionary or Thesaurus?
Do LEO Dictionary or Thesaurus have ads?
Which is updated more often, LEO Dictionary or Thesaurus?
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