These Thumbs Aren't Made For Scrolling
Collapsible interfaces are great. Bootstrap’s Collapse element comes to mind. As does Wikipedia’s collapsible sections you get when viewing from a Mobile. They make it simple to compact a lot of information into a small space. They allow you to easily jump around a document giving you the choice of expanding one section at a time so less scrolling is required. But, what happens when you want to make things compact again? What if you’ve expanded something, scrolled through it, and now want to move on to another section? You have to either scroll all the way back to the top or bottom of the section, depending on which direction you want to go. This can really make for some tired thumbs on a mobile device.
It’s a post-Christmas, post-Boxing Day (for my fellow Canadians), late to the party, app sale!