I want to get this, but before I pay for it I want to make sure I can export it with piano strings and everything, so I can use it for my songs in another program.
Yes, according to the official description, the PRO version of the software allows you to export to MusicXML format that can be imported afterwards to known and supported music composing software. To find more information about import/export function, access the application's page at Google Play Store website.
