How to pay for Smart or Pro site
You can pay directly from the app by going to Site Settings (top right button) and "Upgrade or Renew".
If you are having problems paying with GooglePlay or Apple iTunes / AppStore, there are other solutions available:
Login into your SimDif site with a web browser, on a phone or a computer: https://www.simdif.com
Go to "Upgrade or Renew" and you will see the alternative payment methods we offer.
Here you can take advantage of our special offer, 3 years for the price of 2.