No, but you can add the webapp or the offline webapp to the iOS and Android homescreen as follows. Use https://www.draw.io for the webapp and https://www.draw.io/app for the offline app.

 

10644917_902073346483869_189856415173978765_n.png

Here is an example of adding the app to your homescreen on iOS:

 

iosapp.gif

More information about using the offline app is available here: Using draw.io in Offline Mode