Question about a BU App.

[Puddy Tat]

In a recent thread on the best backup app, DragonSlayer95 stated mybackup is the next best thing for non rooted users. Also stated mybackup can not backup an apps data.
My question is why it cannot?
.
I discovered this when I changed phones.
.
PT

 

[Crashdamage]

AFAIK only Helium can backup app data without rooting your phone. But Helium requires a PC and is somewhat more complicated to use than MyBackup.