2023-06-11 00:00:00 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.