# Three vs ER3D Euler Rotations in 3D

The clearest difference is price: ER3D Euler Rotations in 3D at Free against Three's $0.99. ER3D Euler Rotations in 3D also leads on rating (5.0 vs 2.0). Three's advantage is ratings volume (4 vs 1) and iOS requirement (12.0 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

ER3D Euler Rotations in 3D is free to download; Three costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ER3D Euler Rotations in 3D holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

## The numbers

| Metric | Three | ER3D Euler Rotations in 3D |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [2.0 (4 ratings)](https://appshunter.io/ios/app/three-body-simulator/id6446972716/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/er3d-euler-rotations-in-3d/id6741169432/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Paid | **Free** |
| Size | 72 MB | 114 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [骐显 梁](https://appshunter.io/developer/1314814852) | [Eliott Radcliffe](https://appshunter.io/developer/1477487767) |

## What reviewers say

### Three

[App page](https://appshunter.io/ios/app/three-body-simulator/id6446972716)

Explore celestial mechanics by simulating gravitational interactions between multiple celestial bodies. Users can add up to seven suns and an asteroid matrix to observe complex orbital behaviors and gravitational slingshot effects. The app allows for adjustments to gravity parameters for demonstration purposes.

**Highlights:** Multi-body gravitational simulation, Add up to 7 suns, Asteroid matrix simulation, Observe gravitational slingshots, Adjustable gravity parameters for demonstration, Enlarged volumes for better observation

**Features:** macOS Compatibility

**In-app purchases:** none


### ER3D Euler Rotations in 3D

[App page](https://appshunter.io/ios/app/er3d-euler-rotations-in-3d/id6741169432)

Explore 3D rotational kinematics with interactive models and augmented reality. Visualize complex concepts like yaw, pitch, roll, procession, nutation, and spin. Ideal for engineering students and learners.

**Highlights:** 3D rotational kinematics visualization, Augmented Reality (AR) mode, Space Shuttle and Gyroscope models, Adjustable angles (yaw, pitch, roll, etc.), Interactive Globe Earth model, Contextual text descriptions

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Three free?

Three costs $0.99, with no in-app purchases.

### Is ER3D Euler Rotations in 3D free?

ER3D Euler Rotations in 3D is free to download, with no in-app purchases.

### Which has better reviews, Three or ER3D Euler Rotations in 3D?

ER3D Euler Rotations in 3D is rated higher. Three averages 2.0 out of 5 from 4 ratings, while ER3D Euler Rotations in 3D averages 5.0 from 1 ratings.

### Do Three or ER3D Euler Rotations in 3D have ads?

Neither Three nor ER3D Euler Rotations in 3D shows ads.

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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.*