DATA PROTECTION LEGISLATION: (i) unless and until the GDPR is no longer directly applicable in the UK, the General Data Protection Regulation ((EU) 2016/679) and any national implementing laws, regulations and secondary legislation, as amended or updated from time to time, in the UK and then (ii) any successor legislation to the GDPR or the Data Protection Act 1998.</li> <li>DEVICE: this is a smartphone with an operating system that is compatible with the APP</li> <li>