This app is being sunset. It stays published for existing users; new users should install the free Touch RPN app and purchase the Financial Black-Scholes flavor within the new app.
It's safe to download the app. EPx developed TouchFin Black-Scholes edition that lies within the Business category. The tool has the overall rating 5 on Google Play.
This application has been downloaded and set up by over 100 users and its latest update was released on Sep 15, 2019. You can download the installer of TouchFin Black-Scholes edition 3.99 free of charge and have a look at users' reviews on Droid Informer. The app requires Android 5.0 and higher.