Funimation service was supposed to be launched in December, but today, 11/19, the company decided to move forward. According to the website, you can now watch the anime for free in the catalog.
The service released anime for free through this link , the user can create a new account and enjoy the free days. To sign up, you will need a credit card (which can be national) or a Paypal account, but you can simply skip this step.
Finally, Funimation's national catalog includes My Hero Academia, Demon Slayer, Attack on Titan, Fire Force, Sword Art Online, Fruits Basket, Fairy Tail, Tokyo Ghoul:re, Assassination Classroom among others.