Since Lightning Experience was released, the concept of Classic App and Lightning Apps came up.
- Classic App: an application that has been built in the Classic UI. You can make it visible in Lightning Experience, but that does not convert it into a Lightning App.
- Lightning App: an application that has been built in the Lightning Experience UI.
In this post I want to talk about the benefits that Lightning Apps introduce, with an extra bonus of things to take into account if you are an ISV who builds managed packages.