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How to Deploy a Ruby on Ruby on Rails App on Heroku is a free and ‘simple” push-to-deploy system. Heroku doesn't allow you to deploy an application running on SQLite3; in production the de-facto standard for database is Postgresql. You have to install the Heroku CLI as a deploy tool, it is very simple and convenient to use. To visit and use this app you have to enable at least a Dyno on your app.