I agree that mySugr is a bit busy. I like the simplicity of the LibreLink app, but there are shortcomings. No backup/restore facility, so if you lose your phone or have to do a factory reset, you lose the data on the phone.
The data on the LibreView website is only visible through reports and some of the data is lost, and isn't analysable.
Exporting is only BG. Nothing else.
Poor and if you like to keep your data (for what I don't know, I have all mine for 6 years, never needed to look back more than a few weeks, and never been asked) then you're stuffed.
No search on the phone is a hassle too.
Nothing's perfect
.