simplicityEngine is a new, simple to use drag and drop services platform that lets you build back-ends for all types of applications with little to no coding. There are many great products for front-end development but creating things such as server-side business logic, database access, payment processing and APIs is still unnecessarily complex and code dependent. simplicityEngine is a new, simple to use drag and drop services platform that lets you build back-ends for all types of applications with little to no coding and lets you connect your existing app with other services, applications and tools.