Viceversa is a social decision-making app that enables users to crowd-source opinions on various questions, ranging from simple to complex topics. The development team, led by CEO Jonathan Widawski, chose to build the iOS app using native code and the Android app with Ionic, praising the latter for its ease of use and integration with AngularJS, which facilitated a smooth and fast development process. The app's design was influenced by Google's Material Design guidelines, and split testing was employed to determine the most effective user interfaces. Ionic's updates have improved Android performance, and the team plans to share tutorials on animation and performance enhancement. The developers appreciate Ionic's documentation and active community support, which simplifies the development process.