# Kepler Attack vs BoomCounter

The clearest difference is price: BoomCounter at Free against Kepler Attack's $1.99. BoomCounter also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (15.6 vs 17.0). Kepler Attack's advantage is chart position (#52 vs unranked). On ads, in-app purchases and device support there is nothing between them.

BoomCounter is free to download; Kepler Attack costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Kepler Attack ships an update every 2 months, BoomCounter every 2 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Kepler Attack | BoomCounter |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.5 (943 ratings)](https://appshunter.io/ios/app/kepler-attack-watch-game/id1441234645/reviews)** | — |
| Number of ratings | **943** | — |
| Positive reviews | 81.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Best chart rank | **#52** | — |
| Size | 17 MB | 55 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Red Sprite Studios](https://appshunter.io/developer/493770851) | [Syuzou Hashimoto](https://appshunter.io/developer/1548899363) |

## What reviewers say

### Kepler Attack

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

**Currently charting:** #52 Top Paid · Casual, #114 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


### BoomCounter

[App page](https://appshunter.io/ios/app/boomcounter/id1602967605)

**In-app purchases:** none


## Frequently asked questions

### Is Kepler Attack free?

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

### Is BoomCounter free?

BoomCounter is free to download, with no in-app purchases.

### Do Kepler Attack or BoomCounter have ads?

Neither Kepler Attack nor BoomCounter shows ads.

### Which is updated more often, Kepler Attack or BoomCounter?

Kepler Attack ships an update every 2 months, and BoomCounter every 2 weeks. Most recently, Kepler Attack was updated on November 6, 2026 and BoomCounter on November 3, 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.*