# Slayin vs Kepler Attack

The clearest difference is in-app purchases: Kepler Attack at none against Slayin's 3. Kepler Attack also leads on update cadence (every 2 months vs every 10 months) and chart position (#83 vs unranked). Slayin's advantage is review sentiment (89% vs 81%) and ratings volume (3.1K vs 943). On rating, ads and device support there is nothing between them.

Slayin costs $0.99 and Kepler Attack $1.99 up front. Slayin sells 3 one-off in-app purchases. Kepler Attack asks for nothing beyond the download.

Slayin holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 3.1K and 943 respectively. Written reviews point the same way: 89% of Slayin's written reviews are positive against 81% of Kepler Attack's.

Slayin ships an update every 10 months, Kepler Attack every 2 months. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Slayin | Kepler Attack |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[4.7 (3.1K ratings)](https://appshunter.io/ios/app/slayin/id548580856/reviews)** | [4.5 (943 ratings)](https://appshunter.io/ios/app/kepler-attack-watch-game/id1441234645/reviews) |
| Number of ratings | **3.1K** | 943 |
| Positive reviews | **89.4% of reviews** | 81.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 2 months** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#83** |
| Size | 21 MB | 17 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [FDG Entertainment GmbH & Co.KG](https://appshunter.io/developer/669512574) | [Red Sprite Studios](https://appshunter.io/developer/493770851) |

## What reviewers say

### Slayin

[App page](https://appshunter.io/ios/app/slayin/id548580856)

Embark on an endless action RPG adventure with charming retro graphics and a captivating chiptune soundtrack. Choose from multiple heroes, battle monsters, and collect powerful gear and spells. Be warned, death is permanent in this challenging and rewarding quest to become a true hero.

**Highlights:** Endless action RPG gameplay, Multiple playable classes, Monster and boss battles, Loot collection (weapons, armor, spells), Challenging quests, Retro pixel graphics, Chiptune soundtrack

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bard's Poem | $0.99 | one-time |
| Bard's Sonnet | $2.99 | one-time |
| Bard's Epic | $5.99 | one-time |

**What reviewers like**

- 💎 Perfect game
- 🎮 Fun and addictive gameplay
- 🕹️ Retro and nostalgic feel
- 💰 Great value for money
- 🕰️ Timeless classic

**What reviewers complain about**

- 🐛 Crashes and compatibility issues
- 🔧 Needs updates for newer devices
- 💰 Grindy progression system
- 🕹️ Repetitive gameplay

**Reported bugs**

- Ninja character invisibility bug
- Archer character issues
- Game not loading on some devices
- Sound issues

**Requested features**

- Multiplayer mode
- More characters and content
- Fullscreen mode for modern devices
- Save/load progress across devices


### Kepler Attack

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

**Currently charting:** #83 Top Paid · Casual, #135 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


## Frequently asked questions

### Is Slayin free?

Slayin costs $0.99, and also offers in-app purchases.

### Is Kepler Attack free?

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

### Which has better reviews, Slayin or Kepler Attack?

Slayin is rated higher. Slayin averages 4.7 out of 5 from 3.1K ratings, while Kepler Attack averages 4.5 from 943 ratings.

### Do Slayin or Kepler Attack have ads?

Neither Slayin nor Kepler Attack shows ads.

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

Slayin ships an update every 10 months, and Kepler Attack every 2 months. Most recently, Slayin was updated on October 29, 2026 and Kepler Attack on October 26, 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.*