Tinkerstellar works beautifully with hardware keyboards and trackpads, but you certainly don't need one to use the app. Labs already have all the necessary code in them — so you can simply run it and see what each code snippet does. But you can also edit the code and see how output changes, and the stock on-screen keyboard should work well for that (I've added an extra row of Python specific keys to it, btw).

Isn't that just up to whether or not you want to use a physical keyboard or not? Why would the app make it a hard requirement?