Picstich I use quite a lot before ordering photos. I like because I can create photo collages. I use mostly 2 3x4's on a 4x6 collage. But sometimes use it to make 4 images on a 4x6. So that I can trim the down and use on journaling cards in PL.
Store apps is Michael's for their ad and coupons. I haven't shopped at JoAnn's yet for PL, but will download there app of needed.
I have been using Shutterfly for ordering photos. Only when they have their deals - usually 100 photos for the cost of shipping. Otherwise I go into Sam's with a jump drive to print photos. But quite a few people talk about Walgreens app and prices so might check that out when printing July pictures.
I use my phone for most of my computer needs these days and I think it helped me take the plunge into Project Life as the apps have made it easy to edit and organize my family memories.