Need to add additional coupon option in existing php YI and ionic cordova based web and mobile app

Need to add additional coupon option in existing php YI and ionic cordova based web and mobile app. There is already a coupon feature in the system. The new option will allow us to create a coupon that can been redeemed when it is being used in mobile app only but it should not be usable in web app.

Should be able to work via Teamviewer only.