# Deep Dictionary vs Omnipedia

The clearest difference is in-app purchases: Deep Dictionary at none against Omnipedia's 1. Deep Dictionary also leads on ratings volume (51 vs 1) and update cadence (weekly vs every 2 weeks). Omnipedia's advantage is ads (none vs shown) and rating (5.0 vs 4.7). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Omnipedia sells 1 in-app purchase, starting at $19.99 per year. Deep Dictionary asks for nothing beyond the download.

Omnipedia holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Deep Dictionary has 51 ratings behind it against 1, so its average is the more settled of the two.

Deep Dictionary ships an update weekly, Omnipedia every 2 weeks. The most recent releases landed on October 5, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Deep Dictionary | Omnipedia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (51 ratings)](https://appshunter.io/ios/app/deep-dictionary/id6451319239/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/omnipediaoffline-encyclopedia/id6746692303/reviews)** |
| Number of ratings | **51** | 1 |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 14 MB | 28 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 12+ | 12+ |
| Developer | [DEEPCO](https://appshunter.io/developer/1697523614) | [Recursive Ink Ltd](https://appshunter.io/developer/1770059606) |

## What reviewers say

### 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


### Omnipedia

[App page](https://appshunter.io/ios/app/omnipediaoffline-encyclopedia/id6746692303)

Access a vast offline encyclopedia, even without internet. This app provides fast, private access to millions of articles, with monthly updates and personalized recommendations. Enjoy a clean interface, customizable appearance, and on-device AI for quick answers.

**Highlights:** Offline Wikipedia access, Lightning-fast search, On-device AI for answers, Bookmarks and history, Customizable appearance, Monthly incremental updates

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $19.99 | per year |


## Frequently asked questions

### Is Deep Dictionary free?

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

### Is Omnipedia free?

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

### Which has better reviews, Deep Dictionary or Omnipedia?

Omnipedia is rated higher. Deep Dictionary averages 4.7 out of 5 from 51 ratings, while Omnipedia averages 5.0 from 1 ratings.

### Do Deep Dictionary or Omnipedia have ads?

Deep Dictionary shows ads; Omnipedia does not.

### Which is updated more often, Deep Dictionary or Omnipedia?

Deep Dictionary ships an update weekly, and Omnipedia every 2 weeks. Most recently, Deep Dictionary was updated on October 5, 2026 and Omnipedia on October 17, 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.*