# ViGravitatis vs OrbitCalc

The clearest difference is in-app purchases: ViGravitatis at none against OrbitCalc's 1. ViGravitatis also leads on device support (3 vs 1) and iOS requirement (14.2 vs 18.0). On price and ads there is nothing between them.

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

## The numbers

| Metric | ViGravitatis | OrbitCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/orbitcalc/id6743425109/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 47 months | — |
| Monetization | — | Free |
| Size | 34 MB | 11 MB |
| Requires iOS | **14.2** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Artyom Rudakov](https://appshunter.io/developer/1500000619) | [Bian Dhoan Kwik](https://appshunter.io/developer/1793925532) |

## What reviewers say

### ViGravitatis

[App page](https://appshunter.io/ios/app/vigravitatis/id1500181187)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is ViGravitatis free?

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

### Is OrbitCalc free?

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

### Do ViGravitatis or OrbitCalc have ads?

Neither ViGravitatis nor OrbitCalc 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.*