# Solar System Sim vs KACHUNK

The clearest difference is in-app purchases: KACHUNK at none against Solar System Sim's 5. KACHUNK also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Solar System Sim sells 5 one-off in-app purchases. KACHUNK asks for nothing beyond the download.

## The numbers

| Metric | Solar System Sim | KACHUNK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (4.5K ratings)](https://appshunter.io/ios/app/solar-system-sim/id6447612221/reviews)** | — |
| Number of ratings | **4.5K** | — |
| Positive reviews | 80.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 527 MB | 143 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WPC](https://appshunter.io/developer/1681830786) | [SEMIH SAYDAM](https://appshunter.io/developer/1895048206) |

## What reviewers say

### Solar System Sim

[App page](https://appshunter.io/ios/app/solar-system-sim/id6447612221)

Explore the vastness of space, from planet surfaces to distant galaxies. This real-time gravity sandbox allows you to build and reshape entire solar systems using real astronomical data and physics. Experience the scale of the universe and witness cosmic events firsthand.

**Highlights:** Real-time gravity simulation, Build custom solar systems, First-person planet landing, Sculpt particle rings, Witness real eclipses, Explore nearby stars

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HD Mars | $2.99 | one-time |
| HD Earth | $2.99 | one-time |
| HD Moon | $2.99 | one-time |
| No-ads | $3.99 | one-time |
| HD 3-body pack | $6.99 | one-time |

**What reviewers like**

- 🚀 Realistic simulation
- 🚀 Detailed solar system
- 🚀 Ability to create custom solar systems
- 🚀 Impressive graphics
- 🚀 Frequent updates

**What reviewers complain about**

- 🐛 Crashes and glitches
- 🔋 High battery consumption
- 💰 Excessive ads
- 🐛 Saving and loading issues
- 🐛 Unstable orbits

**Reported bugs**

- Planets/moons disappearing after saving and loading
- Bright flashes and screen distortions
- Planets/objects getting stuck inside stars
- Crashes when colliding or editing certain objects
- Inconsistent orbital mechanics and moons ejecting from planets

**Requested features**

- Add more galaxy and nebula textures
- Implement realistic supernova effects
- Allow customization of planet atmospheres and terrain
- Add binary star systems and rogue planets
- Introduce a galaxy maker and collision feature


### KACHUNK

[App page](https://appshunter.io/ios/app/kachunk-stack-and-drop/id6814694196)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solar System Sim free?

Solar System Sim is free to download, with in-app purchases available.

### Is KACHUNK free?

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

### Do Solar System Sim or KACHUNK have ads?

Solar System Sim shows ads; KACHUNK does not.

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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.*