I bought this based on a recommendation from Mikkel G, but I'm frustrated by how badly this runs on my phone. The interface is unresponsive while inputting the code, and apparently, you need to supply your Twitter account name to be able to see the output of your code. Nope.
Screenshots marked with 🍒 are created by syltefar and are considered public domain, free to use for anything. If you want to, you can note where you found it and link to this page.