I just built a stock valuation app. The valuation is based on Benjamin Graham formula.
This app is aimed to provide an easy way to calculate the intrinsic value of a stock by plugging few parameters and it will automatically pull the relevant parameters from Yahoo Finance and other external finance source to estimate the intrinsic value of stock.
You can find my app using the link:
I have also written an article about the development process in Medium. Feel free to have a read if you are interested.