I have this complaint about iOS all the time that often the "clean look" in iOS leads to grids that exactly match the available viewport and without scrollbars you have no idea if there is more to scroll without idly swiping things around.
I notice that becomes something of a tic of iOS users, if you watch others, in that just about every new screen or panel there's often at least a squiggle of pushing the screen or panel around just to figure out the boundaries.
One of the things I thought was brilliant about early Windows 8-era "metro" design: it was the only era Windows briefly experimented with going scrollbar free (it went back to scrollbar "light" soon after) and when they did so they absolutely made sure that the application grids never lined up with viewport. If there was something to scroll, it would stick out a bit, always that little hint that there was something more further down or right.
It got some flak, especially from macOS design fans, for not being "clean enough", but you'd have apps with no visible scrollbar and you knew whether or not there was anything to scroll just looking at them. You didn't have to squiggle your finger around (or fiddle with the scroll wheel) to check.
Oh so I'm not alone (iOS user here). There have been parts of UIs I have totally failed to notice because I didn't realise you could scroll, because it didn't look like anything was beyond the screen.
I notice that becomes something of a tic of iOS users, if you watch others, in that just about every new screen or panel there's often at least a squiggle of pushing the screen or panel around just to figure out the boundaries.
One of the things I thought was brilliant about early Windows 8-era "metro" design: it was the only era Windows briefly experimented with going scrollbar free (it went back to scrollbar "light" soon after) and when they did so they absolutely made sure that the application grids never lined up with viewport. If there was something to scroll, it would stick out a bit, always that little hint that there was something more further down or right.
It got some flak, especially from macOS design fans, for not being "clean enough", but you'd have apps with no visible scrollbar and you knew whether or not there was anything to scroll just looking at them. You didn't have to squiggle your finger around (or fiddle with the scroll wheel) to check.