@sightlessHorseman, Yes yes, but you're at the mercy of whether an app developer wants to implement that specifically. I mean that, there are a handful of apps I use (YouTube being one) that don't fully adopt this standard. So it's not so universal. I'd argue that, the location of the back button is still able to change, but I honestly think that, if a designer has affectively developed their UI, then you don't really need a back button in the same place every time, because it'll be obvious where it is.
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