When I initially started using the app, it was a plain vanilla investing tool with limited types of investments. What it lacked in depth from an investing standpoint, it made up for in its ease of use, simple graphics, and price...free! Over the years, they have added a lot. You can run a decently robust investment strategy all through the application. It has kept its clean, streamlined look, and continues to be the best platform, free or otherwise, that I have used.