App Support.

We're here to help.


Available Payment Methods

Viscosity can be purchased from our online store using a credit card, PayPal or Bitcoin.

Online Store

Viscosity can be purchased online via credit card, Apple Pay, PayPal or Bitcoin from our Store page. All major credit cards are accepted. The online store accepts MasterCard, Visa or Amex directly, Apple Pay (Amex cards only), Discover via the PayPal gateway, PayPal or Bitcoin. License details are emailed out immediately after purchase.

Using The Store Without Making a PayPal Account

Our online store processes MasterCard, Visa and Amex cards directly. However, PayPal is used as the payment gateway for Discover / Other cards. It is not necessary or required to have (or make) a PayPal account to complete a purchase. To pay with Discover or other cards without creating a PayPal account, select the Discover / Other option from the online store, then click Process My Order. At the next page, select Pay with Debit or Credit Card

Please note that if you don't see the above option, it may be necessary to ensure you are completely logged out of PayPal (if you have logged in previously). To do this, visit the PayPal site directly and log out, and/or clear your web browser's cookies. Alternatively you can simply use a different web browser to make the purchase.