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The app that’s synonymous with sharing photos online is the go-to for many. It’s launched thousands of careers, be it of people broadcasting their love of cats, food, weddings, fitness, or god-knows-whatelse to a hungry audience. Hashtags rule here, either to categorise the shot or for a cheeky ironic caption. [# comedian — Sub-Ed] The app is a doddle to use: take a picture or shoot a video, twiddle with the filters to give an ethereal glow, or even work the contrast sliders for more refinement. You can either shoot a picture straight from the app, or take one on your app of choice and upload from there (possibly after applying your own effects, that is). What’s unusual is that images are usually in a 1:1 rather than 4:3 or 16:9 format, though you can find creative ways to get around this limitation.