DroidTronics is android application graphic and diagram editor. The format used for saving schemes is xml / svg. You can also to export your projects as pdf and png formats, improve version control schemes and finally you can re-open your project/schemes using even text editor or "Import" button menu.
Notation - In order to reopen xml file, suggest to use the application File Manager (Explorer)
A useful hint: Diagram Editor-Designer is also helpful for the representation and schematic of the chemical formulas.
• CAD Diagram Editor
• More than 300 symbols for design overview of your wiring diagram
• Make pseudo code
• Zoom advanced and Layers panel
• Add text and labels
• Save file as xml and svg formats and you can to export to pdf and png
• Button to open xml file
=============
Important notice
To view files saved in your Phone file system I suggest you use the Files by Google application. Unfortunately, the native file systems of some smartphones limit the complete display of folders and files
Thank you for your patience
=============