1Blocker sits in the middle of the Safari blocker spectrum: more control than the set-and-forget apps, far less fiddly than running your own filter lists. You get separate toggles for ads, trackers, cookie notices, social widgets, comment sections and adult content, and if a site breaks you can whitelist it in two taps or write a rule against a specific element yourself.
The reason it is here is the $39.99 Lifetime in-app purchase, which the developer keeps listed next to the $14.99 yearly rather than burying it. Because it is a Universal Purchase with Family Sharing, that one payment covers every Apple device in the house, which is where it beats paying a subscription per year for something that costs the developer very little to keep running.
Understand what the money is for, though: blocklist maintenance. Nobody can sell you a rule set that stays correct forever, so "lifetime" is a bet on 1Blocker LLC still being around and still shipping updates. Given the price, it is about a three-year bet.
Do not buy it if you live in Chrome, or if you mostly want YouTube ads gone — Safari's content blocker API cannot reach either. If Safari is your browser and you just want the web quieter, it is the well-behaved choice.



