One example discloses an apparatus for synchronization, including: a first wireless device, having a first device profile, a near-field magnetic induction (NFMI) signal input and a wireless signal input; wherein the first wireless device is configured to, receive, through the wireless signal input, a first set of data; optimize the first set of data based on the first device profile; receive, through the NFMI signal input, a second set of data optimized for a second device profile of a second wireless device; and synchronize the first and second sets of optimized data based on a set of common data attributes.