# Solar System Sim vs Juno

The clearest difference is rating: Solar System Sim at 4.5 against Juno's 3.8. Solar System Sim also leads on update cadence (every 5 days vs monthly) and review sentiment (81% vs 62%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Solar System Sim sells 5 one-off in-app purchases and Juno sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Solar System Sim holds the better App Store score, 4.5 against 3.8. That said, the two scores are not equally well evidenced: Solar System Sim has 4.4K ratings behind it against 326, so its average is the more settled of the two. Written reviews point the same way: 81% of Solar System Sim's written reviews are positive against 62% of Juno's.

Solar System Sim ships an update every 5 days, Juno monthly. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Solar System Sim | Juno |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (4.4K ratings)](https://appshunter.io/ios/app/solar-system-sim/id6447612221/reviews)** | [3.8 (326 ratings)](https://appshunter.io/ios/app/juno-new-origins/id6475594930/reviews) |
| Number of ratings | **4.4K** | 326 |
| Positive reviews | **80.8% of reviews** | 61.8% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 5 days** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 522 MB | 412 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WPC](https://appshunter.io/developer/1681830786) | [Jundroo, LLC](https://appshunter.io/developer/311852133) |

## What reviewers say

### 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


### Juno

[App page](https://appshunter.io/ios/app/juno-new-origins/id6475594930)

Build and test rockets, planes, and cars with realistic physics in a 3D aerospace sandbox. Progress through a career mode, unlock new technology, and share your creations with a global community.

**Highlights:** 3D aerospace sandbox, Realistic physics simulation, Career mode with tech tree, Customizable part resizing and reshaping, Download and share user-created crafts, Realistic orbit simulation, Interactive tutorials

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Engineer Bundle | $0.99 | one-time |
| Remove Ads | $1.99 | one-time |
| Sandbox Bundle | $2.99 | one-time |
| Career Bundle | $4.99 | one-time |

**What reviewers like**

- 🚀 Great graphics
- 👍 Interesting and fun gameplay
- 🚀 Impressive 3D simulation
- 👍 Detailed rocket/plane building
- 🚀 Realistic physics

**What reviewers complain about**

- 🐛 Buggy and crashes frequently
- 🔧 Complicated controls and UI, especially on mobile
- 💰 Paywall for many features
- 🔧 Lack of tutorials or guidance for beginners
- 🔧 Difficult to delete or modify existing builds

**Reported bugs**

- Engines not igniting properly
- Inability to restore purchases
- Sandbox mode missing key parts
- Severe performance issues on some devices
- Inconsistent part movement and attachment

**Requested features**

- Add more plane and rocket parts
- Improve mobile optimization and controls
- Implement a more comprehensive tutorial system
- Add a 'delete all' or 'clear' option
- Introduce a free sandbox mode with all features unlocked


## Frequently asked questions

### Is Solar System Sim free?

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

### Is Juno free?

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

### Which has better reviews, Solar System Sim or Juno?

Solar System Sim is rated higher. Solar System Sim averages 4.5 out of 5 from 4.4K ratings, while Juno averages 3.8 from 326 ratings.

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

Both Solar System Sim and Juno show ads.

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

Solar System Sim ships an update every 5 days, and Juno monthly. Most recently, Solar System Sim was updated on November 1, 2026 and Juno on October 30, 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.*