There are pros and cons for each. React: once you get the framework down, it's a lot easier to build a native mobile app with React Native. There's no Angular

There are pros and cons for each. React: once you get the framework down, it's a lot easier to build a native mobile app with React Native. There's no Angular Native. Angular: powerful and abundant. A little different, but flexible. Answers on SO for every little thing that will come up to ask. Not sure if newer frameworks will have that same luxury. Rails: a lot of convention. But once you get it down, you'll be able to build complex apps in little time. Also a lot of community support and search engine presence. If it helps, I've open-sourced all code around Standard Notes. It's mostly a Rails/Angular stack. https://github.com/standardnotes/ https://github.com/standardnotes/