That rule holds true for all phone screens, large or small, but as phones grow to jumbo dimensions, that top-screen stretch becomes a strain. No matter which hand you use, screen bottom is most comfortable, while the top demands a stretch. In the end, top versus bottom is more important than left versus right. Even so, optimizing for one hand penalizes the other: the best solutions put core features at screen middle, where left and right thumb zones overlap. But this left-versus-right distinction isn’t especially crucial, since most of us switch hands easily (and frequently) depending on context. What about lefties? The thumb zone flips from left to right. Avoid the red-zone reach, or at least compensate with larger-than-usual touch targets. The green thumb zone is the most comfortable and accurate region of phone screens for one-handed users. She also found that, for right-handed users, the bottom and top-right corners were the least accurate thumb zones. Within this comfort zone, a separate, fan-shaped arc draws out the most accurate targets for thumb tapping, as uncovered in a study by Qian Fei of Alibaba (subscription required). The same arc shape applies to the two-handed cradle grip, but the arc is larger because the thumb has greater range of motion.Ĭomfort and accuracy don’t perfectly align, however. For example, if you hold a phone in the right hand, your thumb falls naturally in an arc at the bottom left corner of the screen-no stretching your thumb or shifting the phone required.
While a thumb can sweep most of the screen on all but the most oversized phones, only a third of the screen is truly effortless territory: at the bottom, on the side opposite the thumb. Though we often refer to “finger-friendly” designs, the thumb does most of the work. Combine all those folks, and it’s thumbs up: thumbs drive 75% of all phone interactions. Of those who cradle their phone in one hand and tap with the other, Hoober discovered that most use their thumb on the screen. Even when we use both hands, many of us prefer mashing away with our thumb then, too. When we hold our phones with one hand, the thumb is the only finger comfortably available for tapping. So while few of us stick with the same grip, we show a distinct preference for one-handed use. That means many of us favor our non-dominant hand, while using the other to write, drink coffee, hold a baby, or read a book about designing for touch. Hoober found that two-thirds of one-handed grips are in the right hand-a majority, but smaller than the 90% who are right handed.
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We switch between one hand and two, or swap between left and right sometimes we tap absent-mindedly while doing something else and other times we stop and give the screen our full attention. The study also confirmed what many of us know from our own phone habits: we change grips frequently, depending on convenience and context. Smartphone use is defined by three basic handholds, and we often shift among them. At 49%, the one-handed grip was most popular 36% cradled the phone in one hand and jabbed with the finger or thumb of the other and the remaining 15% adopted the two-handed BlackBerry-prayer posture, tapping away with both thumbs.
He found that in nearly every case, they held their phones in one of three basic grips. In 2013, researcher Steven Hoober took to the streets to observe over 1,300 people tapping away at their phones. Let’s start with that most familiar of gadgets. We stare at it for more than 20% of our waking hours, consulting it 221 times per day on average. The smartphone is of course the device that we hold most. This chapter looks at why the thumb is so important, and reveals fundamental “rules of thumb” based on how we grab screens of all sizes. That fact helps us establish sturdy cross-device guidelines.
Whether we’re tapping away at tiny phones or jumbo tablets, our thumbs do most of the walking.
Yet these devices also share many consistencies, especially in the crucial role of thumbs. 3 days of design, code, and content for web & UX designers & devs.
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