Sentry - Blocker for Safari.

Sentry for Safari is a powerful and simple-to-use content blocker.
The app tells Safari in advance what kinds of websites to block based on a list of domains. The list of blacklisted domains is taken from the best tracker investigation platforms. You can edit the list and activate only a limited set of domains.
Terms of use: https://docs.google.com/document/d/1dcS07VfugNzpAPxjz2zzBKpVSYU_AqL3-2aFPDZP69A/edit. Privacy policy: https://docs.google.com/document/d/1g4AJwB-TGF7GQRJCIfcPhEp6MVNO3M6n1eIgx-lQ7V8/edit#heading=h.o9blb4yr19il.
Note. If you subscribe via Apple, payment will be charged to App Store Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Account will be charged for renewal within 24 hours prior to the end of the current period at the rate of the selected plan. Subscriptions and auto-renewal may be managed by going to Account Settings after purchase.