You can add or remove devices at any time. There are no restrictions on adding and removing devices after publishing survey. Follow steps to add/remove devices from your survey builder account

1. Login to your Survey Builder Account
2. Click on Devices Tab
3. Select or Deselect device from checkbox for each device
4. Click on Assig Surveys button from left side sidebar
5. Choose the survey you want to assign to device
6. Click on Assig Surveys button
7. Go to Data4Action App on your device and Download Survey