How does LibreView merge data from multiple devices?

You can view one set of reports with data from multiple devices, including when you have switched from one smartphone to another. You can choose which devices you want included in the report; however, data from certain devices cannot be combined with others.
Note: Notes from all devices are displayed without modification. If the same note is entered on multiple devices, all instances are displayed. Data uploaded into LibreView prior to the release of version 3.0 cannot be merged.