Hush Nag Blocker

Hush Nag Blocker is a privacy-first extension that blocks cookie prompts and tracking nags, giving you a cleaner browsing experience. It runs locally, has no third-party dependencies or data leaving your device, and uses Safari's blocking mechanism via Hush's instructions.

The project is Open Source under the MIT license, so you can inspect the code. Easy to install: Settings > Safari > Extensions; thousands of rules run in the background with no settings required. Available on iPhone, iPad, and Mac. "I'd recommend Hush to anyone who uses Safari" — John Gruber, Daring Fireball.