not really sure of your question but, the app is on your phone, the data is on the cloud but syncs with your phone. if you are out and about, and the app takes a while to open, it is because it is looking for a good signal to open whether it is wifi or mobile. I found when out and about, it is better to turn off wifi and just let the mobile take over, the echo app will open faster as long as it is getting a good signal.
I have the note 5 too :-)
If you are trying to open your shopping list, it may be better to use a recipe from ifttt and have it email to you. that is what I do.