I tried out Quetta on iPhone last year and i remember thinking it was nice and clean browser. They did not have a Android version then but they do now m, even apk fowbload and first impression is that it feels very responsive, adblocking built in and support for some extensions. Cool beans. Though now i question their buisnessplan as the development and upkeep does cost money. They do mention plans for premium features on the faq in the future but they have been at it for a while already. https://www.quetta.net/#Quetta