# Spaceflight Simulator vs Booster Up!

Spaceflight Simulator and Booster Up! both sit at 4.8 stars, but that hides the real split: 86% of Spaceflight Simulator's written reviews are positive against 19% of Booster Up!'s. Spaceflight Simulator also leads on ads (none vs shown) and ratings volume (97K vs 17K). Booster Up!'s advantage is iOS requirement (11.0 vs 15.0). On price, rating, update cadence and in-app purchases there is nothing between them.

Both are free to download. Spaceflight Simulator sells 10 one-off in-app purchases and Booster Up! sells 14 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Spaceflight Simulator holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Spaceflight Simulator has 97K ratings behind it against 17K, so its average is the more settled of the two. Written reviews point the same way: 86% of Spaceflight Simulator's written reviews are positive against 19% of Booster Up!'s.

Spaceflight Simulator ships an update every 9 days, Booster Up! weekly. The most recent releases landed on September 25, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Spaceflight Simulator | Booster Up! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (97K ratings)](https://appshunter.io/ios/app/spaceflight-simulator/id1308057272/reviews)** | [4.6 (17K ratings)](https://appshunter.io/ios/app/booster-up/id1668176193/reviews) |
| Number of ratings | **97K** | 17K |
| Positive reviews | **85.5% of reviews** | 19.2% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 172 MB | 400 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Spaceflight Simulator UK Ltd](https://appshunter.io/developer/1308057271) | [Rollic Games](https://appshunter.io/developer/1452111779) |

## What reviewers say

### Spaceflight Simulator

[App page](https://appshunter.io/ios/app/spaceflight-simulator/id1308057272)

Build and launch rockets to explore a realistic, open universe. Experience space exploration with accurate physics and a vast, explorable solar system.

**Highlights:** Build custom rockets, Realistic orbital mechanics, Explore a scaled universe, Visit planets and moons, Open-world space exploration, Real-life physics simulation

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Skins Expansion | $2.99 | one-time |
| Full Version | $3.99 | one-time |
| Redstone + Atlas Pack | $3.99 | one-time |
| Parts Expansion | $4.99 | one-time |
| Infinite Area Expansion | $4.99 | one-time |
| Expansion Bundle | $7.99 | one-time |
| Cheats Expansion | $9.99 | one-time |
| Full Bundle Upgrade | $9.99 | one-time |
| Full Bundle | $11.99 | one-time |
| Full Bundle | $14.99 | one-time |

**What reviewers like**

- 🚀 Realistic physics and space simulation
- 👍 Intuitive controls and easy to learn
- 🚀 Ability to build complex rockets and spacecraft
- 👍 No ads or in-app purchases required to play

**What reviewers complain about**

- 🐛 Occasional bugs and glitches, especially with large rockets
- 🔋 Potential performance issues on older devices
- 🔒 Limited customization and part options in free version
- 🚀 Docking and rendezvous maneuvers can be very challenging

**Reported bugs**

- Rocket parts sometimes clipping through each other
- Occasional freezing or crashing when launching large rockets
- Issues with RCS thrusters firing unexpectedly during docking
- Problems with maintaining stable orbits and transfers

**Requested features**

- Add more planets, moons, and celestial bodies to explore
- Implement a career mode or progression system with challenges
- Allow for more customization of rocket parts and spacecraft
- Improve docking and rendezvous mechanics to make them more accessible
- Add the ability to control individual astronauts and perform EVAs


### Booster Up!

[App page](https://appshunter.io/ios/app/booster-up/id1668176193)

Embark on an intergalactic adventure by merging rocket modules to create powerful spacecraft. Launch your rocket, explore planets, collect rewards, and upgrade components to fly farther and overcome challenges.

**Highlights:** Merge rocket modules, Launch and explore planets, Collect rewards and stars, Upgrade rocket components, Unlock new rockets, Overcome space challenges

**Features:** macOS Compatibility

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Beginners Pack | $0.99 | one-time |
| Money - 50M | $1.99 | one-time |
| Diamond - 3M | $1.99 | one-time |
| No ADS | $3.99 | one-time |
| Special Module Pack | $4.99 | one-time |
| Skip It - 60x | $5.99 | one-time |
| Diamond - 25M | $5.99 | one-time |
| Adventurer’s Pack | $6.99 | one-time |
| Adventurer's Pack with No-Ads | $9.99 | one-time |
| Astronaut’s Pack | $12.99 | one-time |
| Astronaut’s Pack with No Ads | $14.99 | one-time |
| Explorer’s Pack | $19.99 | one-time |
| Diamond - 150M | $19.99 | one-time |
| Explorer’s Pack with No Ads | $24.99 | one-time |

**What reviewers like**

- 🚀 Fun and challenging gameplay
- 🚀 Simple and intuitive controls
- 👍 Visually appealing graphics

**What reviewers complain about**

- 🐛 Frequent bugs and glitches
- 💸 Excessive in-app advertisements
- 🔒 Requires internet connection to play
- 🔋 High battery consumption

**Reported bugs**

- Rocket parts disappearing after upgrades
- Inability to reach or progress past certain planets
- Inconsistent reward payouts
- Game freezing or crashing
- Saved progress not loading correctly

**Requested features**

- Offline play mode
- More diverse rocket and module options
- Improved progression system
- Better reward balancing


## Frequently asked questions

### Is Spaceflight Simulator free?

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

### Is Booster Up! free?

Booster Up! is free to download, with in-app purchases available.

### Which has better reviews, Spaceflight Simulator or Booster Up!?

Spaceflight Simulator is rated higher. Spaceflight Simulator averages 4.8 out of 5 from 97K ratings, while Booster Up! averages 4.6 from 17K ratings.

### Do Spaceflight Simulator or Booster Up! have ads?

Booster Up! shows ads; Spaceflight Simulator does not.

### Which is updated more often, Spaceflight Simulator or Booster Up!?

Spaceflight Simulator ships an update every 9 days, and Booster Up! weekly. Most recently, Spaceflight Simulator was updated on September 25, 2026 and Booster Up! on September 24, 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.*