Kepler Attack vs Cube Flex Full
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
Cube Flex Full
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This is Cube Flex - perfect game to kill your time. Just go to green tiles, collect coins and make fun! Compete with players around the world! Game has cool music, interesting gameplay and more than 30 amazing skins. Can you collect them all? With Apple Watch support you can play almost everywhere!
Screenshots
Verdict
The clearest difference is in-app purchases: Kepler Attack at none against Cube Flex Full's 1. Kepler Attack also leads on update cadence (every 2 months vs every 21 months) and chart position (#30 vs unranked). Cube Flex Full's advantage is price ($0.99 vs $1.99) and iOS requirement (15.6 vs 17.0). On ads and device support 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 Cube Flex Full $0.99 up front. Cube Flex Full sells 1 one-off in-app purchase. Kepler Attack asks for nothing beyond the download.
Kepler Attack ships an update every 2 months, Cube Flex Full every 21 months. The most recent releases landed on October 13, 2026 and August 24, 2026 respectively.
| Parameter | Kepler Attack | Cube Flex Full |
|---|---|---|
| Price | $1.99 | $0.99 — better |
| Rating | 4.5 (942 ratings) — better | — |
| Positive reviews | 81.4% of reviews | — |
| Number of ratings | 942 — better | — |
| Update frequency | Every 2 months — better | Every 21 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Best chart rank | #30 — better | — |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 17.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 17 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Red Sprite Studios | Danila Dorokhov |
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
Cube Flex Full
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Kepler Attack
No in-app purchases
Cube Flex Full
- 600 coins$0.99
Questions
Is Kepler Attack free?
Is Cube Flex Full free?
Do Kepler Attack or Cube Flex Full have ads?
Which is updated more often, Kepler Attack or Cube Flex Full?
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