I use a pixel editor on my laptop, it's just like toolpic.com but it came with this laptop. I couldn't imagine using a phone, it's hard enough to see details on this thing. I don't know why they only let you make them a certain size here unless you pay for their "pro" service. I'm not about to pay them when they already make money off my work as it is. I can go to ezgif.com and make them as big as I want or even enlarge stuff I made on here for free ;)