Purism Touch (PT) framework is new visual language for touch screen devices that shares visual principles of Gnome Desktop and reflects it to new context of mobile devices running Free & Open Source Operating System PureOS.
Single hand gesture range
Average thumb movement comfortable reach. Majority of users prefer use one hand for interacting with mobile apps and system interface. The position of a action target with respect to the thumb radius impacts performance and general experience of touch interface.
Touch Target Area
Regarding action targets like links, buttons, sliders and other UI elements, comfortable space would not be less than physical square 7x7 - 9x9mm and cozy space of 14x14mm.