For all locksmiths who have this 2M2 Magic Tank error "App not installed", just uninstall and install from the below link, tested 100% working fine.
http://120.24.22.15:2512/file/download/apk
Good luck!
If not work, contact us for the tech support of 2M2 Magic Tank Automatic Car Key Cutting Machine.
Email: sales@OBDexpress.co.uk
WhatsApp: +86 18750906257
Skype: obd2express.co.uk