# Kepler Attack vs ArcEmu

The clearest difference is monetization model: ArcEmu at free against Kepler Attack's paid. ArcEmu also leads on rating (4.9 vs 4.5) and update cadence (fortnightly vs every 6 weeks). Kepler Attack's advantage is chart position (#45 vs unranked) and iOS requirement (12.1 vs 15.5). On price, ratings volume, ads and in-app purchases there is nothing between them.

Kepler Attack costs $1.99 and ArcEmu $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ArcEmu holds the better App Store score, 4.9 against 4.5. Both are backed by a comparable volume of ratings — 942 and 1.3K respectively. Written reviews point the same way: 81% of Kepler Attack's written reviews are positive against 95% of ArcEmu's.

Kepler Attack ships an update every 6 weeks, ArcEmu fortnightly. The most recent releases landed on September 20, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Kepler Attack | ArcEmu |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | [4.5 (942 ratings)](https://appshunter.io/ios/app/kepler-attack-watch-game/id1441234645/reviews) | **[4.9 (1.3K ratings)](https://appshunter.io/ios/app/arcemu/id6496282733/reviews)** |
| Number of ratings | 942 | **1.3K** |
| Positive reviews | 81.4% of reviews | **94.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | Paid | **Free** |
| Best chart rank | **#45** | — |
| Size | 31 MB | 172 MB |
| Requires iOS | **12.1** | 15.5 |
| Devices | iPhone, iPad, iPod, Apple Watch | **iPhone, iPad, iPod, Apple TV, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Red Sprite Studios](https://appshunter.io/developer/493770851) | [Raffaele D'Amato](https://appshunter.io/developer/529947655) |

## What reviewers say

### Kepler Attack

[App page](https://appshunter.io/ios/app/kepler-attack-watch-game/id1441234645)

**Currently charting:** #45 Top Paid · Casual, #97 Top Paid · Action (US App Store)

Engage in a retro arcade space shooter experience on your iPhone and Apple Watch. Destroy waves of alien invaders with power-ups and intuitive controls. Enjoy fast-paced gameplay perfect for short bursts of fun.

**Highlights:** Space shooter gameplay, Alien invasion waves, Power-ups (Shield, Triple Shot, etc.), Apple Watch Crown controls, iPhone swipe controls, Retro arcade graphics, Short burst gameplay

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 😁 Great for apple watches
- 🎮 An actual video game
- 🎶 What's the music called?
- 📱 I love the fact that you can play this game on an Apple Watch
- ⏱️ Old School Arcade Immediacy and Brevity

**What reviewers complain about**

- 🙄 Not worth paying for
- 💰 Ain't worth the money really
- 🙄 Fun but basic
- 😒 Stupid forced reviews
- 🐛 Won't install

**Reported bugs**

- Game doesn't play complete rip off
- Just says on the watch version that it has to be installed on my iPhone for it to work. It's installed on my iPhone. Doesn't work.
- This seems like a good game but I don't see it on my watch.
- I have the first version watch Apple one, and it does not work on the watch,And has offered me a refund, I appreciate it.
- It won't download on my watch

**Requested features**

- Add a golden starship IF
- Please add upgrades so we can have bettr ships


### ArcEmu

[App page](https://appshunter.io/ios/app/arcemu/id6496282733)

Experience retro gaming on your Apple Watch, iPhone, and iPad. This emulator supports Game Boy, Game Boy Color, and Game Boy Advance cartridges. Enjoy features like multiplayer, cheats, and customizable controls.

**Highlights:** Game Boy, GBC, GBA emulation, Multiplayer support, Cheat codes, Customizable on-screen controls, Save State sharing, iCloud support

**Features:** macOS Compatibility, Game Controller support, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Fully functional
- 🚀 Impressive emulation on Apple Watch
- 👍 Great emulator for both phone and watch
- 👍 Seamless save state transfer between devices
- 👍 Customizable controls and layout

**What reviewers complain about**

- 🐛 Compatibility issues with some games
- 🐛 Audio quality problems on certain games
- 👎 Limited functionality on Apple Watch
- 👎 Difficult controls for action-heavy games on watch

**Reported bugs**

- Occasional crashes
- Graphical glitches with certain ROMs
- Save data not transferring properly between devices

**Requested features**

- Add cheat/GameShark support
- Improve volume controls
- Implement fast forward/slow motion options
- Allow multiple save slots per game
- Improve Game Boy Color support


## Frequently asked questions

### Is Kepler Attack free?

Kepler Attack costs $1.99, with no in-app purchases.

### Is ArcEmu free?

ArcEmu costs $1.99, with no in-app purchases.

### Which has better reviews, Kepler Attack or ArcEmu?

ArcEmu is rated higher. Kepler Attack averages 4.5 out of 5 from 942 ratings, while ArcEmu averages 4.9 from 1.3K ratings.

### Do Kepler Attack or ArcEmu have ads?

Neither Kepler Attack nor ArcEmu shows ads.

### Which is updated more often, Kepler Attack or ArcEmu?

Kepler Attack ships an update every 6 weeks, and ArcEmu fortnightly. Most recently, Kepler Attack was updated on September 20, 2026 and ArcEmu on September 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*