# OneLook Thesaurus vs Deep Dictionary

The clearest difference is review sentiment: Deep Dictionary at 78% against OneLook Thesaurus's 33%. Deep Dictionary also leads on rating (4.7 vs 3.9) and in-app purchases (none vs 2). OneLook Thesaurus's advantage is ads (none vs shown) and device support (4 vs 1). On price, ratings volume and iOS requirement there is nothing between them.

Both are free to download. OneLook Thesaurus sells 2 in-app purchases, starting at $0.99 per month. Deep Dictionary asks for nothing beyond the download.

Deep Dictionary holds the better App Store score, 4.7 against 3.9. Both are backed by a comparable volume of ratings — 21 and 51 respectively. Written reviews point the same way: 33% of OneLook Thesaurus's written reviews are positive against 78% of Deep Dictionary's.

OneLook Thesaurus ships an update monthly, Deep Dictionary every 5 days. The most recent releases landed on September 28, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | OneLook Thesaurus | Deep Dictionary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (21 ratings)](https://appshunter.io/ios/app/onelook-thesaurus/id1615071061/reviews) | **[4.7 (51 ratings)](https://appshunter.io/ios/app/deep-dictionary/id6451319239/reviews)** |
| Number of ratings | 21 | **51** |
| Positive reviews | 33.3% of reviews | **77.8% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 7 MB | 13 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Datamuse Corporation](https://appshunter.io/developer/493493805) | [DEEPCO](https://appshunter.io/developer/1697523614) |

## What reviewers say

### OneLook Thesaurus

[App page](https://appshunter.io/ios/app/onelook-thesaurus/id1615071061)

This app helps writers find the perfect word or phrase quickly. It offers advanced search features, custom keyboard integration, and speech input for effortless word discovery. Ideal for creative writing, word games, and expanding vocabulary.

**Highlights:** Custom keyboard integration, Speech input for word description, Synonyms, similar words, associated words, Rhymes, quotes, and lyrics, Word game helpers (crosswords, Wordle), Word and Place-of-the-Day, Ad-free experience

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard | $0.99 | per month |
| Standard Yearly | $9.99 | per year |


### Deep Dictionary

[App page](https://appshunter.io/ios/app/deep-dictionary/id6451319239)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OneLook Thesaurus free?

OneLook Thesaurus is free to download, with in-app purchases available.

### Is Deep Dictionary free?

Deep Dictionary is free to download, with no in-app purchases.

### Which has better reviews, OneLook Thesaurus or Deep Dictionary?

Deep Dictionary is rated higher. OneLook Thesaurus averages 3.9 out of 5 from 21 ratings, while Deep Dictionary averages 4.7 from 51 ratings.

### Do OneLook Thesaurus or Deep Dictionary have ads?

Deep Dictionary shows ads; OneLook Thesaurus does not.

### Which is updated more often, OneLook Thesaurus or Deep Dictionary?

OneLook Thesaurus ships an update monthly, and Deep Dictionary every 5 days. Most recently, OneLook Thesaurus was updated on September 28, 2026 and Deep Dictionary on September 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*