TextNow supports international calling! Dialing an international number shows the cost per minute. Once the call is connected, the per minute rate is deducted from your balance.
Add money or earn credits:
Web: My Account > My Wireless Account > Manage Payment > Add Money.
In-app: Tap on the menu > Account Balance > Add Money > choose the $$$ amount. The card on file will be charged.
Earn credit: Tap on the menu > Account Balance > Account Credit > Earn money for your account.
I need a refund on my credits: