Comparison

Kepler Attack vs I Monkey Jam

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

I Monkey Jam

Features
Currently charting
Read full description

Monkey Jam is a fun and challenging arcade game where you guide a playful monkey to collect bananas while avoiding falling coconuts. The game tests your reflexes as you move the monkey back and forth to grab bananas and dodge coconuts. Catching a coconut ends the game, so stay sharp! Features: Three Difficulty Levels: Adjust the game to your skill level. As you progress, the number of coconuts increases, making the game more challenging. Top Scores: Track your best performances with the Top 10 scores saved in the game. Try to beat your own record! Endless Gameplay: Play as long as you can avoid coconuts. The game continues until you make a mistake. Intuitive Controls: Control the monkey by tapping the screen or using the Digital Crown for precise movement. Get ready to enjoy hours of entertainment in this fast-paced, banana-collecting adventure! Wraparound Screen Navigation Enter a screen from the right — and exit on the left. It’s like stepping into a looped world, where the monkey flows seamlessly through the edges of your screen. You can now kick coconuts to earn bonus points! But be careful — they’re still dangerous. Think you can master the timing? Use P.S. Not more than 30 min per day :) :) :)

Screenshots

Kepler Attack4 screens

Verdict

The call

The clearest difference is update cadence: Kepler Attack at every 6 weeks against I Monkey Jam's every 3 months. Kepler Attack also leads on chart position (#35 vs #200) and device support (4 vs 2). On 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 I Monkey Jam $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Kepler Attack ships an update every 6 weeks, I Monkey Jam every 3 months. The most recent releases landed on September 25, 2026 and September 10, 2026 respectively.

Scorecard5 real differences · 6 level
Kepler Attack versus I Monkey Jam: the parameters behind the verdict, then further details
ParameterKepler AttackI Monkey Jam
Price$1.99 — better$2.99
Rating4.5 (942 ratings) — better—
Positive reviews81.4% of reviews—
Number of ratings942 — better—
Update frequencyEvery 6 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
Best chart rank#35 — better#200
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, Apple Watch
Requires iOS12.1 — better17.0
Further details — not scored
Size31 MB16 MB
Age rating4+4+
DeveloperRed Sprite StudiosMaksym Volobuiev

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

I Monkey Jam

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Kepler Attack

No in-app purchases

None

I Monkey Jam

No in-app purchases

Questions

Is Kepler Attack free?
Kepler Attack costs $1.99, with no in-app purchases.
Is I Monkey Jam free?
I Monkey Jam costs $2.99, with no in-app purchases.
Do Kepler Attack or I Monkey Jam have ads?
Neither Kepler Attack nor I Monkey Jam shows ads.
Which is updated more often, Kepler Attack or I Monkey Jam?
Kepler Attack ships an update every 6 weeks, and I Monkey Jam every 3 months. Most recently, Kepler Attack was updated on September 25, 2026 and I Monkey Jam on September 10, 2026.
Which is more popular, Kepler Attack or I Monkey Jam?
Kepler Attack currently peaks at #35 in the App Store charts, and I Monkey Jam at #200. Chart position reflects recent download velocity rather than total install base.

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