Ease of use refers to the degree to which a person believes that using a particular system or product will be effort-free (e.g. the ease of search and acquisition, usability, personalisation, service, and support). All else being equal, a feature or application perceived as easier to use than another is more likely to be accepted by users, according to Wang.[24] Interestingly in Tornatzky and Klein’s meta-analysis of the relationship between the characteristics of an innovation and its adoption, they found compatibility, relative advantage, and complexity have the most consistent significant relationships across a broad range of innovation types.[25] Complexity is defined as “the degree to which an innovation is perceived as relatively difficult to understand and use”. Therefore, the easier it is to use an innovative application or feature, the more likely it is to be accepted by the user.