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The gestures demonstrated are easily discoverable and are so widely used now, I'd argue the majority of iOS/Android users are familiar. Snapchat, Instagram, Facebook, Spotify, etc. all follow these similar UI/UX features. Software should work well for everyone, but it's evolving and users adapt.

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I'm not sure which features of Tinder are part of my daily UX. I know it has a different notion of "swipe left/swipe right" than most things I use - in the apps I use that means "go back a page/go forward a page". In Tinder I'm vaguely aware that one direction means "I want to have sex with you", but I am not aware which direction that is.

There are hints, so swiping doesn't seem unintuitive. Btw, I've used tinder-like gestures for my music discovery app based on Apple Music API ( https://itunes.apple.com/app/id1182799885 ). I think this pattern works perfectly for binary decisions.

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