# dob vs LOGO 2

The clearest difference is in-app purchases: LOGO 2 at none against dob's 1. LOGO 2 also leads on device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

dob costs $2.99 and LOGO 2 $2.99 up front. dob sells 1 one-off in-app purchase. LOGO 2 asks for nothing beyond the download.

dob ships an update every 3 months, LOGO 2 every 6 months. The most recent releases landed on June 11, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | dob | LOGO 2 |
| --- | --- | --- |
| Price | $2.99 | $2.99 |
| 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 | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Paid | — |
| Size | 78 MB | 36 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Rene Fehr-Biscioni](https://appshunter.io/developer/969998405) | [profax Verlag AG](https://appshunter.io/developer/1238219692) |

## 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 |


### LOGO 2

[App page](https://appshunter.io/ios/app/logo-2-discover/id1248779820)

**In-app purchases:** none


## Frequently asked questions

### Is dob free?

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

### Is LOGO 2 free?

LOGO 2 costs $2.99, with no in-app purchases.

### Do dob or LOGO 2 have ads?

Neither dob nor LOGO 2 shows ads.

### Which is updated more often, dob or LOGO 2?

dob ships an update every 3 months, and LOGO 2 every 6 months. Most recently, dob was updated on June 11, 2026 and LOGO 2 on May 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.*