Sharing your app from the Cardtapp iPhone & Android app is one of the easiest ways to share because you can import contacts from your phone!
From the Share tab, manually enter the recipient's contact information or click the grey square by the “Name of Person Receiving App” field to access your phone’s contacts
Select the contact you want to share your app with
Click the blue “Share Now” button
The recipient will receive a text message with a link that they will click on to download the app.