Adguard on desktop and Android. Globally blocks all ads across browsers and apps (except embedded ads like IG and Twitter). Truly magical and worth every penny.
Are you asking about blocking ads on a smartphone? Or on a desktop/laptop? The answer depends on your platform, you see.
Both?
Blokada on Android + PiHole on wifi. In the really occasional instances where I'm away from wifi and Blokada is down, it's night and day.
On iphone, Perfect Browser. Easily the most configurable and best browser at adblocking.