# Liquid Apptoy vs Solar System Sim

The clearest difference is in-app purchases: Liquid Apptoy at none against Solar System Sim's 5. Liquid Apptoy also leads on iOS requirement (13.0 vs 15.0). Solar System Sim's advantage is update cadence (every 2 weeks vs every 8 months) and ratings volume (4.2K vs 64). On price, rating, review sentiment and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.5 for Liquid Apptoy against 4.5 for Solar System Sim. That said, the two scores are not equally well evidenced: Solar System Sim has 4.2K ratings behind it against 64, so its average is the more settled of the two. Written reviews are what separate them: 84% of Liquid Apptoy's written reviews are positive against 80% of Solar System Sim's.

Liquid Apptoy ships an update every 8 months, Solar System Sim every 2 weeks. The most recent releases landed on August 14, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Liquid Apptoy | Solar System Sim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (64 ratings)](https://appshunter.io/ios/app/liquid-apptoy/id551226640/reviews) | [4.5 (4.2K ratings)](https://appshunter.io/ios/app/solar-system-sim/id6447612221/reviews) |
| Number of ratings | 64 | **4.2K** |
| Positive reviews | **83.5% of reviews** | 79.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 8 months | **Every 2 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 38 MB | 513 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DAN-BALL](https://appshunter.io/developer/348592290) | [WPC](https://appshunter.io/developer/1681830786) |

## What reviewers say

### Liquid Apptoy

[App page](https://appshunter.io/ios/app/liquid-apptoy/id551226640)

Experience a fluid simulation game where you can manipulate water. Add colors, transform it into clouds, or even ice. This interactive experience offers a unique way to play with virtual liquids.

**Highlights:** Fluid simulation gameplay, Water manipulation, Add colors to water, Transform water into clouds, Transform water into ice

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

**In-app purchases:** none


### Solar System Sim

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

Simulate and explore celestial bodies within our solar system and beyond. Create your own solar systems, experiment with gravity and physics, and observe orbital mechanics in action.

**Highlights:** Explore planets and moons, Visit nearby stars, Create custom solar systems, Gravity and physics simulation, Recalculate orbits, Newton's laws implementation

**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


## Frequently asked questions

### Is Liquid Apptoy free?

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

### Is Solar System Sim free?

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

### Which has better reviews, Liquid Apptoy or Solar System Sim?

Liquid Apptoy and Solar System Sim are both rated 4.5 out of 5 on the App Store, from 64 and 4.2K ratings respectively.

### Do Liquid Apptoy or Solar System Sim have ads?

Both Liquid Apptoy and Solar System Sim show ads.

### Which is updated more often, Liquid Apptoy or Solar System Sim?

Liquid Apptoy ships an update every 8 months, and Solar System Sim every 2 weeks. Most recently, Liquid Apptoy was updated on August 14, 2026 and Solar System Sim on September 28, 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.*