diff --git a/Docs/ProjectOverview.md b/Docs/ProjectOverview.md
index cc77f27a..4a76fa01 100644
--- a/Docs/ProjectOverview.md
+++ b/Docs/ProjectOverview.md
@@ -13,7 +13,11 @@ ScreenPlay consists of 5 projects:
 
 ![ProjectOverview.png](ProjectOverview.png)
 
-### ScreenPlay classes
+### ScreenPlay App Class
+ScreenPlay wrapps all classes into a App.h and App.cpp class. This is easier for unit test integration (not implemented yet!). The main app class is used for owning [all other classes via Q_PROPERTY](https://gitlab.com/kelteseth/ScreenPlay/-/blob/master/ScreenPlay/app.h#L39) to be easily accessible in the GUI/QML. We use the [constructor](https://gitlab.com/kelteseth/ScreenPlay/-/blob/master/ScreenPlay/app.cpp#L44) of the App class to initialize all Qt register types, fonts and to check if another ScreenPlay instance is running. The [init()](https://gitlab.com/kelteseth/ScreenPlay/-/blob/master/ScreenPlay/app.cpp#L103) method is used to initialize  all other c++ classes in a certain order! It also sets up some events [signal/slots](https://doc.qt.io/qt-5/signalsandslots.html) like when the user changes the UI language.
+
+For all other class documentation please visit [ScreenPlayDeveloperDocs](https://kelteseth.gitlab.io/ScreenPlayDeveloperDocs/)
+
 ``` mermaid
         graph TD