# Hippi 1 vs dob

The clearest difference is in-app purchases: Hippi 1 at none against dob's 1. Hippi 1 also leads on device support (3 vs 1) and iOS requirement (9.3 vs 12.0). dob's advantage is update cadence (every 3 months vs every 63 months). On price and ads there is nothing between them.

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

Hippi 1 ships an update every 63 months, dob every 3 months. The most recent releases landed on October 16, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Hippi 1 | dob |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 63 months | **Every 3 months** |
| Monetization | — | Paid |
| Size | 81 MB | 78 MB |
| Requires iOS | **9.3** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Leripa AB](https://appshunter.io/developer/454449587) | [Rene Fehr-Biscioni](https://appshunter.io/developer/969998405) |

## What reviewers say

### Hippi 1

[App page](https://appshunter.io/ios/app/hippi-1/id562217677)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Hippi 1 free?

Hippi 1 costs $2.99, with no in-app purchases.

### Is dob free?

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

### Do Hippi 1 or dob have ads?

Neither Hippi 1 nor dob shows ads.

### Which is updated more often, Hippi 1 or dob?

Hippi 1 ships an update every 63 months, and dob every 3 months. Most recently, Hippi 1 was updated on October 16, 2026 and dob on October 1, 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.*