Make a phone call

Use this to create a button on your form to make a phone call to a phone number entered in a text field.

This example creates a button on your form that makes a phone call when it’s tapped. The phone number to call is pulled from another field on the form. It assumes you have a text field to enter the phone number with a data name of phone_number and a hyperlink field with a data name of call_phone. It also includes a check for the platform since the web browser does not support calling phone numbers.

ON('click', 'call_phone', function(event) {
  if (!EXISTS($phone_number)) {
    ALERT('You must enter a phone number.');

  if (!ISMOBILE()) {
    ALERT('Only mobile devices support making phone calls.');

  OPENURL('tel:' + $phone_number);