WTF is a free iPhone app developed by NOS Comunicacoes S.A. that offers a range of features to help you manage your tariff, play games, and win prizes. With this app, you can easily control your balances, check your mobile data consumption, and activate vouchers for Uber, Uber Eats, and Cinema NOS.

One of the standout features of WTF is the Scratch game, where you can try your luck and win various prizes, including balance top-ups, internet data, discounts, and more. Additionally, the app offers exclusive hot deals for WTF users, allowing you to enjoy special discounts and offers.

Furthermore, WTF encourages you to invite your friends to join the app, as you can earn even more rewards by doing so. Overall, WTF provides a convenient and entertaining way to manage your tariff and enjoy various perks and prizes.