# OrbitCalc vs Resonant Quantum Mechanics

The clearest difference is in-app purchases: Resonant Quantum Mechanics at none against OrbitCalc's 1. On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. OrbitCalc sells 1 one-off in-app purchase. Resonant Quantum Mechanics asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for OrbitCalc against 5.0 for Resonant Quantum Mechanics. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

## The numbers

| Metric | OrbitCalc | Resonant Quantum Mechanics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/orbitcalc/id6743425109/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/resonant-quantum-mechanics/id6771489975/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Weekly |
| Monetization | Free | Free |
| Size | 11 MB | 144 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Bian Dhoan Kwik](https://appshunter.io/developer/1793925532) | [RQM Technologies LLC](https://appshunter.io/developer/6771489977) |

## What reviewers say

### OrbitCalc

[App page](https://appshunter.io/ios/app/orbitcalc/id6743425109)

This tool helps space enthusiasts, engineers, and researchers precisely calculate satellite orbits. It allows users to determine orbital parameters from vector data or vice versa with accurate results. Save and manage your calculations, and customize measurement units for a personalized experience.

**Highlights:** Orbital calculations from parameters or vectors, Save and revisit previous calculations, History page for managing saved work, Customizable measurement units

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OrbitCalc Pro | $0.99 | one-time |


### Resonant Quantum Mechanics

[App page](https://appshunter.io/ios/app/resonant-quantum-mechanics/id6771489975)

Explore quantum mechanics through interactive 3D visuals and guided lessons. This educational app uses geometry and quaternions to explain complex concepts like quantum states, hydrogen, and the periodic table. No login is required for this visual learning experience.

**Highlights:** Interactive 3D visuals, Guided lessons, Geometric approach to quantum mechanics, Explains quaternions and quantum states, Covers hydrogen and periodic table, No login required

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OrbitCalc free?

OrbitCalc is free to download, with in-app purchases available.

### Is Resonant Quantum Mechanics free?

Resonant Quantum Mechanics is free to download, with no in-app purchases.

### Which has better reviews, OrbitCalc or Resonant Quantum Mechanics?

OrbitCalc and Resonant Quantum Mechanics are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do OrbitCalc or Resonant Quantum Mechanics have ads?

Neither OrbitCalc nor Resonant Quantum Mechanics 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.*