Hello everyone! I am an undergrad currently doing research for a nuclear physicist at the University of Notre Dame. My current project is taking a code (written in Fortran-63 in 1967 ) that calculates relativistic kinematics for two-body nuclear reactions and converting into some sort of phone application that can be easily used in the laboratory. The problem I've run into is that after looking into Apple and Android app development, it looks like a program like this (especially when it's written by an undergrad without a ton of experience in user-interface) will not make into an app store. Does anyone have any suggestions on how to implement code on a smartphone without having to go through the app store? My thought was maybe through a mobile-friendly web page or something along those lines, but I wouldn't know where to begin implementing that.