# dob vs WordNet Offline Dictionary

The clearest difference is price: WordNet Offline Dictionary at Free against dob's $2.99. WordNet Offline Dictionary also leads on in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 3 months). dob's advantage is ads (none vs shown) and iOS requirement (12.0 vs 15.5).

WordNet Offline Dictionary is free to download; dob costs $2.99 up front. dob sells 1 one-off in-app purchase. WordNet Offline Dictionary asks for nothing beyond the download.

dob ships an update every 3 months, WordNet Offline Dictionary every 2 weeks. The most recent releases landed on June 11, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | dob | WordNet Offline Dictionary |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/dob-visual-perception/id981954512/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 78 MB | 113 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Rene Fehr-Biscioni](https://appshunter.io/developer/969998405) | [Duc Hung Le](https://appshunter.io/developer/1590124314) |

## What reviewers say

### dob

[App page](https://appshunter.io/ios/app/dob-visual-perception/id981954512)

This app offers exercises to train essential visual skills like attention, coordination, and memory. It's designed for learners of all ages, including children and individuals undergoing rehabilitation, and can be customized to individual needs.

**Highlights:** Visual Attention training, Ocular motility exercises, Hand and Eye Coordination, Motion Perception, Contrast Sensitivity, Face and facial expression recognition, Color Recognition and differentiation, Figure-Ground Perception

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All exercises | $11.99 | one-time |


### WordNet Offline Dictionary

[App page](https://appshunter.io/ios/app/wordnet-offline-dictionary/id6740097597)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is dob free?

dob costs $2.99, and also offers in-app purchases.

### Is WordNet Offline Dictionary free?

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

### Do dob or WordNet Offline Dictionary have ads?

WordNet Offline Dictionary shows ads; dob does not.

### Which is updated more often, dob or WordNet Offline Dictionary?

dob ships an update every 3 months, and WordNet Offline Dictionary every 2 weeks. Most recently, dob was updated on June 11, 2026 and WordNet Offline Dictionary on May 16, 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.*