Released ExprEval Android application (and Java library)
I recently released ExprEval, my first android application. It's a simple expression calculator, with support for variables and custom functions. It's based on a Java library I've been working for a while; both the application and the library are open source (MIT-licensed). You can find all the sources on Github, here for the app and here for the library, that also includes a command-line version of the calculator.
You can download the application from F-droid, the repository for free & open-source Android apps, with this button: