I never upload images to Instagram straight from my phone. Ever. I like to take photos with my DSLR, and I like to have a white border around all them, too. It's a little bit of a process I go through to edit and schedule my images, so I decided to share with you how I do it, and the apps I use.
First up, the editing process. I use pixlr.com to edit and re-size my images. I either upload the images I want to use from my SD card, or if there does happen to be an image on my phone I want to use I simply upload that image to the Dropbox app on my phone, which in turn automatically uploads the image to the Dropbox folder on my laptop. Super simple.