The idea of this app is to meet my personal needs.
I put a sim card in my spare phone to receive the messages then email to the specified address.
Since I only learned Android for two days, just to achieve this function, the interface is simple enough, the permissions should be given in the settings manually, and will crash if not be given. Only tested on redmi GO.
* SMS permission is used to monitor SMS in the background
* Phone permission is used to check if it is a dual cards model
* Contacts permission is a TODO. What to use name instead of phone number
Support dual SIM cards
Support send to different addresses
Support background running
An app specific password is required if 2 step verification is on of gmail account
A test email will be sent when run