Suparelay - call real phone numbers in other countries from a browser tab, pay per minute

we built suparelay.app for calling banks, airlines and family landlines from abroad without a sim or an app. you open the tab and dial, and the other side answers on a normal phone. us numbers are from 4¢/min, uk landlines 5¢, india 9¢. would love blunt feedback on the dialer and the pricing page.