I really like Locus as a GPS and mapping app but one of the complaints I've had about it has been the lack of a feature for synchronising across different devices or transferring waypoints and tracks to a new device. It's now possible to set Locus to back up to Dropbox or Google Drive, or when you do a manual back up to share the back up with the same cloud storage sites. You can then restore your back up to Locus on other devices and keep everything in sync. I don't know if the same feature is available in the free version. This may not be new but I've only just become aware of it and it seems to have been come available in one of the recent updates. Forgive me if I'm just sharing what everyone already knows.