# Kepler Attack vs Space Impact Watch

The clearest difference is update cadence: Kepler Attack at every 2 months against Space Impact Watch's every 15 months. Kepler Attack also leads on ratings volume (942 vs 6) and chart position (#54 vs unranked). Space Impact Watch's advantage is price ($0.99 vs $1.99) and iOS requirement (15.6 vs 17.0). On rating, review sentiment, ads and in-app purchases there is nothing between them.

Kepler Attack costs $1.99 and Space Impact Watch $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Kepler Attack holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: Kepler Attack has 942 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 81% of Kepler Attack's written reviews are positive against 74% of Space Impact Watch's.

Kepler Attack ships an update every 2 months, Space Impact Watch every 15 months. Both last shipped on November 11, 2026.

## The numbers

| Metric | Kepler Attack | Space Impact Watch |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | **[4.5 (942 ratings)](https://appshunter.io/ios/app/kepler-attack-watch-game/id1441234645/reviews)** | [4.3 (6 ratings)](https://appshunter.io/ios/app/space-impact-watch/id1550604563/reviews) |
| Number of ratings | **942** | 6 |
| Positive reviews | **81.4% of reviews** | 73.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 15 months |
| Monetization | Paid | Paid |
| Best chart rank | **#54** | — |
| Size | 17 MB | 11 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad, Apple Watch | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 9+ |
| Developer | [Red Sprite Studios](https://appshunter.io/developer/493770851) | [Small Water s.r.o.](https://appshunter.io/developer/1188809867) |

## What reviewers say

### Kepler Attack

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

**Currently charting:** #54 Top Paid · Casual, #104 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


### Space Impact Watch

[App page](https://appshunter.io/ios/app/space-impact-watch/id1550604563)

Relive classic retro arcade shooter memories on your wrist. This game offers eight classic levels with bosses, sharp graphics, and adjustable controls. Compete on a worldwide leaderboard and enjoy an infinite mode for endless alien-blasting action.

**Highlights:** Eight classic levels with bosses, Crispy sharp retro graphics, Adjustable gesture and Digital Crown controls, Three special weapons, Worldwide leaderboard, Infinite mode

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Kepler Attack free?

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

### Is Space Impact Watch free?

Space Impact Watch costs $0.99, with no in-app purchases.

### Which has better reviews, Kepler Attack or Space Impact Watch?

Kepler Attack is rated higher. Kepler Attack averages 4.5 out of 5 from 942 ratings, while Space Impact Watch averages 4.3 from 6 ratings.

### Do Kepler Attack or Space Impact Watch have ads?

Neither Kepler Attack nor Space Impact Watch shows ads.

### Which is updated more often, Kepler Attack or Space Impact Watch?

Kepler Attack ships an update every 2 months, and Space Impact Watch every 15 months. Most recently, Kepler Attack was updated on November 11, 2026 and Space Impact Watch on November 11, 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.*