Instagram is the latest hit app. It is available for smart phones and Ipods/ pads. It allows you to invite other users to be your friend and you can have as many followers as you want. You upload pictures to your account and only your followers can comment on them. You can also comment on your followers. And if you don't feel like commenting you can like the photo. If you want to follow me, my account is brooklynswims. This app is free.