If you are looking for a site/app where you can watch anime without ads and you want to finish watching One Piece, here are some recommendations:
1. Crunchyroll - It is a popular anime streaming site/app that offers a wide selection of anime series, including One Piece. It has both free and ρáíd options, but with the ρrémíùm subscription, you can watch anime without ads.
2. Funimation - Funimation is another great option for watching anime without ads. It offers a vast library of anime series, including One Piece, and has both free and ρáíd subscription plans.
3. Hulu - Hulu is a streaming service that offers a wide selection of TV shows and movies, including anime series. It has a vast library of anime shows, including One Piece, and has both free and ρáíd subscription options.
4. Netflix - Netflix is a popular streaming service that offers a wide variety of TV shows, movies, and anime series. It has a vast collection of anime content, including One Piece, and offers a subscription-based service without ads.
Overall, these are some of the best sites/apps to watch anime without ads and to finish watching One Piece. You can explore each of these options and choose the one that suits you best.