YooTok offers international calling with Twilio, allowing users to make calls from their iOS devices while abroad, with no need for additional credit card information or contracts. The app provides a dedicated Twilio number and tracks call costs, as well as features such as free call recording and call forwarding. Pavlos Mitsopoulos and his team at MobileLoft have developed the app, which is currently available only for iOS devices but has plans to expand to Android in the future.