The native app stays installed and unfiltered. No third-party filter can modify Instagram, YouTube, or TikTok themselves — iOS doesn't permit it. Every filter here only works inside its own surface. If the native app remains a tap away with full feeds, the filter protects nothing; either delete the native apps, bury them behind a whole-app blocker schedule, or be honest that you'll route around the filter by Friday. The strict setup is filter plus whole-app block, not filter instead of it.
Feeds change shape; filters chase. Instagram and YouTube rearrange surfaces regularly, and every rearrangement can break a filter until its developer ships an update. Small teams (most vendors here) fix things in days, not hours — check recent update history in the App Store before buying a subscription, and prefer vendors with visible changelogs. Safari content blocking (Scrolless) degrades more gracefully than DOM-dependent filtered browsers, but no approach is immune.
Logins, notifications, and posting get worse. Filtered browsers mean re-authenticating, missing push notifications (SocialLite reviewers flag missed DMs specifically), and returning to the native app to post. If DMs-for-work or posting matter, test notifications for a full week before committing — a filter that costs you clients is worse than no filter. TikTok deserves its own warning: its mobile web version is itself a feed, so "TikTok support" in a filter means a slightly restyled feed, not a defused one.