In Designing Mobile Interfaces, Steven Hoober shows that 49% of people hold their smartphones with one hand, relying on thumbs to do the heavy lifting. Josh Clark took this even further in his book Designing for Touch and determined that 75% of interactions are thumb-drive. Human thumbs can only stretch so far, and it is important for interface and experience designers to take this into account when designing products intended for their use.
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Thumb-zone mapping for left- and right-handed users. The “combined” zone shows the best possible placement areas for most users. |
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Apple combats the issue of thumb reach in their larger iOS devices with their Usability feature, which shifts the screen content down when needed. |
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