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SwiftKey but on the versions before they added the Cloud service.

Very stable for me now. And I like my settings with the Light theme, largest font, and the fastest 100 ms on a longpress so when I want numbers or punctuations or smilies, it comes up instantly.

Works very fast and accurate for me. This is why I dont mind phones to be a little bigger. I say Sony Xperia Z1 is abt my limit on a phone size.
 
SwiftKey by far, stock Android on my Tab 3 8.0 and Galaxy sucked balls. I don't know what it is but I was always miss typing etc, not with SwiftKey though. And nothing matches it's predictive ability, predictive sucks on stock android and you still have to space after selecting a word vs SwiftKey that auto spaces making it way more efficient. Flow works perfect on it too. Never got any lagging ever on any device, not sure how somebody could've had that happen?
 
FYI y'all... Kii keyboard premium version is 30% off right now. Not sure how long it'll last. Worth it.
 
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