# Kepler Attack vs I Monkey Jam

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 device support (4 vs 2) and chart position (#53 vs #200). On ads and in-app purchases there is nothing between them.

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.

## The numbers

| Metric | Kepler Attack | I Monkey Jam |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | **[4.5 (942 ratings)](https://appshunter.io/ios/app/kepler-attack-watch-game/id1441234645/reviews)** | — |
| Number of ratings | **942** | — |
| Positive reviews | 81.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Paid | — |
| Best chart rank | **#53** | #200 |
| Size | 31 MB | 16 MB |
| Requires iOS | **12.1** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Red Sprite Studios](https://appshunter.io/developer/493770851) | [Maksym Volobuiev](https://appshunter.io/developer/1763636559) |

## What reviewers say

### Kepler Attack

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

**Currently charting:** #53 Top Paid · Casual, #102 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


### I Monkey Jam

[App page](https://appshunter.io/ios/app/i-monkey-jam/id6736526146)

**Currently charting:** #200 Top Paid · Family (US App Store)

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