Riddance

Get your storage back one swipe at a time. Left to toss, right to keep. Every photo shows how much space it frees.

No subscription. 100 free swipes every month, forever, with every feature. One $4.99 purchase removes the cap.
No internet needed. Riddance itself makes no network connections; Apple's App Store handles the optional purchase. Your photos never leave your iPhone.
Nothing is deleted behind your back. Tossed photos go to Recently Deleted through Apple's own confirmation, so you can still recover them for 30 days.