What are /r/Skyforce's favorite Products & Services?

From 3.5 billion Reddit comments

I liked this one... free, no internet, and fine graphics:

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https://play.google.com/store/apps/details?id=com.ArtInGames.AirAttack2f

So you're a dev? Just found sky force again after years of not playing (had nearly if not completely beaten both games), then the play store recommended some other game that appears to be a clone with way more monetization and some crappy upgrade system called Wing Fighter on Android. IDK if it matters or anything can be done, just wanted to let you know