All of SweetHawk's Zendesk apps come with a free trial.
When installing a paid app, Zendesk's marketplace functionality is to always ask for credit card details. However, we, in fact, don't bill you until your trial is over. So if you uninstall the app before your trial ends, you won't get charged.
If you don't have access to a credit card, use the coupon code NOCC which will allow you to start your trial. Please arrange an alternate payment method prior to your trial ending to avoid your app getting disabled. You can purchase an account balance from within your billing portal that you can access within the app.
If you need to test out the app for a longer period of time, contact us at firstname.lastname@example.org.