Most tapped areas on iPhone (by percentage)?

Is there a way to find out what are the most tapped areas on an iPhone screen, by percentage?

Does the users tend to tap more the elements that are placed in the bottom part of the screen, because it feels more naturally due to the hand position when holding it, or does the eye play a major role on guiding the user torwards the elements on the upper part?

Have there been tests conducted on the matter?

Thanks! :)

Answer

This study of 1,333 people has some great information on how users hold their phones, and which areas of the screen are most accessible.

Their data showed that people held their phones in 3 basic ways

one handed — 49%

cradled — 36%

two handed — 15%

The accessibility heatmaps looked like the following:

Single Hand

Cradling in Two Hands

Two-Handed Use

There is a lot more detail available in their article.