# Four vs INNIO Learning Experiences

The clearest difference is rating: INNIO Learning Experiences at 5.0 against Four's 4.7. INNIO Learning Experiences also leads on review sentiment (100% vs 92%). Four's advantage is ratings volume (89 vs 2) and iOS requirement (8.0 vs 12.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

INNIO Learning Experiences holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Four has 89 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 92% of Four's written reviews are positive against 100% of INNIO Learning Experiences's.

Four ships an update every 7 months, INNIO Learning Experiences every 5 months. The most recent releases landed on October 15, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Four | INNIO Learning Experiences |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (89 ratings)](https://appshunter.io/ios/app/four-stroke-otto-engine-3d/id1376010957/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/innio-learning-experiences/id1438616709/reviews)** |
| Number of ratings | **89** | 2 |
| Positive reviews | 92.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 183 MB | 233 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MOZAIK Education Ltd.](https://appshunter.io/developer/1064850236) | [MEDIASQUAD Medienentwicklungs- und Vertriebs-GmbH](https://appshunter.io/developer/1279429261) |

## What reviewers say

### Four

[App page](https://appshunter.io/ios/app/four-stroke-otto-engine-3d/id1376010957)

Explore the inner workings of a four-stroke Otto engine through interactive 3D animations. This app offers an engaging way to learn about automotive technology with features like rotation, zooming, and predefined views. It's designed for students but enjoyable for all ages, with multilingual support and VR capabilities.

**Highlights:** Interactive 3D engine model, Rotate, zoom, and pan views, Predefined navigation angles, Multilingual support, VR mode compatibility, Built-in animations and narrations

**Features:** macOS Compatibility

**In-app purchases:** none


### INNIO Learning Experiences

[App page](https://appshunter.io/ios/app/innio-learning-experiences/id1438616709)

Explore the fundamental principles of gas engines through interactive 3D and augmented reality experiences. Learn how these engines power the world by watching videos, collecting parts, and virtually starting an engine.

**Highlights:** Interactive 3D engine models, Augmented Reality (AR) engine experience, Educational videos, Collect engine parts, Virtual engine startup, Learn gas engine fundamentals

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Four free?

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

### Is INNIO Learning Experiences free?

INNIO Learning Experiences is free to download, with no in-app purchases.

### Which has better reviews, Four or INNIO Learning Experiences?

INNIO Learning Experiences is rated higher. Four averages 4.7 out of 5 from 89 ratings, while INNIO Learning Experiences averages 5.0 from 2 ratings.

### Do Four or INNIO Learning Experiences have ads?

Neither Four nor INNIO Learning Experiences shows ads.

### Which is updated more often, Four or INNIO Learning Experiences?

Four ships an update every 7 months, and INNIO Learning Experiences every 5 months. Most recently, Four was updated on October 15, 2026 and INNIO Learning Experiences on October 3, 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.*