On Instagram, "picture talking" is very common since the service is completely geared towards pictures but people still want to use words from time to time.

So to express a thought or thank friends, Instagram users have to find a way to put words onto a picture. The most common is to write a note in Notes, take a screenshot and upload that. But on the stylish communication medium that Instagram is, it can look a little gauche. So people will often upload pictures of handwritten notes, etc. which have some class but not everyone wants to go to that much effort.

The easiest thing is to offer a 612x612 template and the ability to show a PNG that users could then save to their Camera Roll and then upload to Instagram. If you can connect with the user's Instagram account and let them upload from Instagram like Chute does, even better!

Disclaimer: been totally cranking on my own words-on-pictures app for the last few weeks — congrats!