# Inside Us vs Solar System Sim

The clearest difference is in-app purchases: Inside Us at none against Solar System Sim's 5. Inside Us also leads on ads (none vs shown) and iOS requirement (11.0 vs 15.0). Solar System Sim's advantage is update cadence (every 5 days vs every 2 months). On price and device support there is nothing between them.

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

Inside Us ships an update every 2 months, Solar System Sim every 5 days. The most recent releases landed on October 27, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Inside Us | Solar System Sim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (4.4K ratings)](https://appshunter.io/ios/app/solar-system-sim/id6447612221/reviews)** |
| Number of ratings | — | **4.4K** |
| Positive reviews | — | 80.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 85 MB | 522 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ALOTEQ SP Z O O](https://appshunter.io/developer/1503970130) | [WPC](https://appshunter.io/developer/1681830786) |

## What reviewers say

### Inside Us

[App page](https://appshunter.io/ios/app/inside-us-bacteria-rush/id6443545809)

**Features:** macOS Compatibility

**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 Inside Us free?

Inside Us 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.

### Do Inside Us or Solar System Sim have ads?

Solar System Sim shows ads; Inside Us does not.

### Which is updated more often, Inside Us or Solar System Sim?

Inside Us ships an update every 2 months, and Solar System Sim every 5 days. Most recently, Inside Us was updated on October 27, 2026 and Solar System Sim on November 1, 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.*