Design for mobile.
Smartphones continue to grow in size but our hands don’t, so design solutions need to ensure that mobile interactions remain comfortable, quick and easy to use.
Designing for thumbs.
In recent tests conducted by Steven Hoober is was discovered that over 75% of mobile phone user’s relied on thumb use, and 49% on a one-handed grip. On larger screens, those kinds of behaviours can have implications for user-friendliness – as larger screens stretch the thumb to uncomfortable positions in order to reach controls which are outside of the thumbs natural comfort zone.
To make sure important and frequently-used actions are comfortably reached with one-hand or one-thumb interactions, we need to consider positioning controls at the bottom of the screen.
This solution doesn’t just address reachability, it can also improve a variety of other important metrics. In recent testing Facebook found that a bottom tab bar solution in their iOS app also improved engagement, satisfaction, and even perception of speed.