How To: Zoom Into Photos on Instagram (iPhone)

Instagram. Everyone has one and if you don't you're missing out. Recently I graduated high school and a ton of people have been posting pictures from graduation on Instagram. Long story short, I showed my mom some of the pictures and when she double-tapped an image she saw a heart instead of a zoomed image like she was looking for. Believe it or not there's a built in feature on the iPhone that let's do zoom in. No jailbreak required. No software needed. So legggo.