The last couple of month I've been working hard to get ready my new App "Function Inspector".
It features the ability to plot up to three functions, include a parameter, take screenshots and a very user-friendly UI! Here are the Screenshots:
It is published in two versions: LITE and PRO. The screenshots are of the PRO version. The PRO version is 0.99 Euro whereas the LITE version is free. With the LITE version you can only plot one Function at a time, you cannot toggle to fullscreen mode, the screenshots will have watermarks and it will contain ads ;)