# Kepler's Laws vs Interactive Solar System

The clearest difference is price: Kepler's Laws at Free against Interactive Solar System's $1.99. Interactive Solar System's advantage is update cadence (fortnightly vs every 7 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Kepler's Laws is free to download; Interactive Solar System costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Kepler's Laws ships an update every 7 months, Interactive Solar System fortnightly. The most recent releases landed on July 4, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Kepler's Laws | Interactive Solar System |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/keplers-laws/id885067661/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 16 MB | 52 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPad | **iPad, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Vladimir Vascak](https://appshunter.io/developer/868771511) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## What reviewers say

### Kepler's Laws

[App page](https://appshunter.io/ios/app/keplers-laws/id885067661)

Explore animated visualizations and interactive tasks designed to help you grasp Kepler's laws of planetary motion. This educational tool offers a clear way to understand complex astronomical concepts through visual aids and practical exercises.

**Highlights:** Animated visualizations, Interactive tasks, Understanding planetary motion, Educational tool, Astronomy concepts

**Features:** macOS Compatibility

**In-app purchases:** none


### Interactive Solar System

[App page](https://appshunter.io/ios/app/interactive-solar-system/id1240878228)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kepler's Laws free?

Kepler's Laws is free to download, with no in-app purchases.

### Is Interactive Solar System free?

Interactive Solar System costs $1.99, with no in-app purchases.

### Do Kepler's Laws or Interactive Solar System have ads?

Neither Kepler's Laws nor Interactive Solar System shows ads.

### Which is updated more often, Kepler's Laws or Interactive Solar System?

Kepler's Laws ships an update every 7 months, and Interactive Solar System fortnightly. Most recently, Kepler's Laws was updated on July 4, 2026 and Interactive Solar System on September 18, 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.*