Make an android version
I don't want to have to get my surface pro out just to make a diagram, an android app would be so much more useful.
Pepe Vera commented
More, there are tens of diagramming apps in the Play Store nowadays. Some of them are very good!
But Visio is second to none... only it does not have an android version...
Even if it were for mindmaps of somewhat simplified diagramming capabilities... I would have it in a rush... even if I had to pay a bit for it.
I totally share this opinion! Please create a Visio app for android like for Word & Co.