long time jolla user since the first phone, it’s sadly time to move.
I create a command tool (node.js) so everyone can at least export its sms/mms/phone log to its new phone (android, no clue about iphone). There some alternative but those are bugged, at lot. here the link
Rest of the info are in the front page of the git repo.
Depend on the demand I may create a more friendly Gui version.
PS: no, with the introduction of %$#@ sailjail it was impossible to create a native app