Main mobile app categories ranked by user loyalty in the United Kingdom (UK) 2016

* The source adds the following information on the methodology used to measure user loyalty:
"(...) measured by Verto’s Stickiness Index, which compares daily users to monthly users to quantify the relative size of the highly engaged audience."
"Stickiness(%) = Average daily users(#)/Monthly users(#)"

The source adds the following information: "The Verto Analytics single-source measurement methodology is based on behavioural data gathered from a panel of consumers that own and use multiple devices. Our panelists, who are incentivized for their participation, opt in to install a measurement app on all of their digital devices. Simply put, we quantify the consumer journey across all apps, sites, services, and devices. We calibrate the panel data against our census-level crossdevice calibration data."