When you use i-Draw standalone (i.e. without an integrated cloud account), no personal information is requested, so there’s nothing to send to us.
When you use i-Draw no information available from the computer you logged into is sent to us at any point. The app access your local drive to save your custom built flows and diagrams so that you can choose the location to store them on your computer.
i-Draw is as fully a client-side application as is technically possible. In the cases of a storage selection of local filesystem, localStorage on browser, the data does not travel through our servers when saving and loading.
When creating raster and PDF exports the diagram data is sent, securely, to our image export servers and the result returned. All data is only ever held in memory, never written to disk. The data is cleared from memory after the export is completed and returned securely.
If an error condition occurs whilst using the application, the application may send an error report back to the servers. This report contains the program line and condition that occurred. Such reports contain no personal information or parts of your diagram data, nor do they contain any substantial information regarding your usage of the application.
We use Google analytics because it draws us pretty pictures and tells us how many users we have. There is a URL parameter analytics=0, i.e. https://www.draw.io/?analytics=0, that disables Google Analytics.