Comparison

Kepler Attack vs Space Impact Watch

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Kepler Attack

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
Read full description

Featured in Apple's "Great on watchOS 6" and "Our Favourite Apple Watch Apps" collections! #2 Casual Game in the US! Kepler Attack is an arcade game for your iPhone and Apple Watch. Fly through space and destroy waves of alien space invaders from Kepler-452b. “I’m just amazed that this is on my Watch.” - Tom, host of The Apple WatchCast Podcast - http://www.applewatchcast.com “I think this is actually my personal favorite new game now on the Apple Watch because of its really fast pacing which is perfect for these types of games.” - HotshotTek, 10 Awesome Apple Watch Games Apps of 2019 • Inspired by Gyruss, Galaga, Galaxian and Space Invaders! • Beautiful retro arcade graphics! • Fast paced alien attack waves with a variety of enemy space invaders! • Power-ups include Shield, Triple Shot, Rapid Fire and Smart Bomb! • Intuitive and simple controls using the Crown on the Watch! • Swipe to move on the iPhone! • Short burst gameplay is perfect for the Watch and iPhone! • Retro sound effects on the iPhone! • Play anywhere, anytime! • Includes Valentine's Day and Santa Christmas Holiday theme! • Runs at 60fps on the Watch! Relive the glory days of the arcade on your Apple Watch and iPhone. Thanks for playing Johnno & Pete

About

Space Impact Watch

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
Read full description

THE LEGENDARY RETRO SHOOTER - ON YOUR WRIST, AND NOW ON IPHONE & IPAD! Remember gaming under the school desk on those bulky, indestructible old phones? Relive those moments - under the office desk, on your watch. And now also on your iPhone and iPad! Dive into the Space Impact world exactly as you remember it - with plenty of modern upgrades: - All eight old-school levels with bosses, exactly as you remember them. Put that muscle memory to good use. - Crisp, sharp graphics with the original retro sprites - without the ghosting of the old 84x48 displays. You can finally see what's happening on that tiny screen. - NEW: fully playable on iPhone and iPad. - Adjustable controls: gestures and the Digital Crown on the watch, on-screen buttons on iPhone and iPad. - Three special weapons - deeply satisfying to fire. - Worldwide Game Center leaderboard. Can you make the TOP 100? - Infinite mode: finished all the levels and want more? Blast alien invaders for as long as your skills hold out. - Butter-smooth movement and animations. Space awaits - on your wrist!

Screenshots

Kepler Attack4 screens
Space Impact Watch4 screens

Verdict

The call

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 (#48 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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard5 real differences · 6 level
Kepler Attack versus Space Impact Watch: the parameters behind the verdict, then further details
ParameterKepler AttackSpace Impact Watch
Price$1.99$0.99 — better
Rating4.5 (942 ratings) — better4.3 (6 ratings)
Positive reviews81.4% of reviews — better73.7% of reviews
Number of ratings942 — better6
Update frequencyEvery 2 months — betterEvery 15 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#48 — better—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod, Apple Watch — better
Requires iOS17.015.6 — better
Further details — not scored
Size17 MB11 MB
Age rating4+9+
DeveloperRed Sprite StudiosSmall Water s.r.o.

Customer experience

Kepler Attack

All ratings942 ratings
Positive87.6%
Neutral5.5%
Negative6.9%
Written reviews43 reviews
Positive81.4%
Neutral7.0%
Negative11.6%

Space Impact Watch

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews19 reviews
Positive73.7%
Neutral0.0%
Negative26.3%

Bugs and requests

Kepler Attack

Reported bugs

5 issues
  • 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

2 requests
  • Add a golden starship IF
  • Please add upgrades so we can have bettr ships

Space Impact Watch

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Kepler Attack

No in-app purchases

None

Space Impact Watch

No in-app purchases

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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