Kepler Attack vs I Monkey Jam
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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.
- 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
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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
I Monkey Jam
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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
Verdict
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
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.
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.
| Parameter | Kepler Attack | I Monkey Jam |
|---|---|---|
| Price | $1.99 — better | $2.99 |
| Rating | 4.5 (942 ratings) — better | — |
| Positive reviews | 81.4% of reviews | — |
| Number of ratings | 942 — better | — |
| Update frequency | Every 6 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #35 — better | #200 |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, Apple Watch |
| Requires iOS | 12.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 31 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Red Sprite Studios | Maksym 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
Kepler Attack
No in-app purchases
I Monkey Jam
No in-app purchases









