What it costs

Nothing. It runs on ads.

The app is free and has no in-app purchases or subscriptions. It shows a full-screen ad when it opens, and plays a short rewarded video before each delete; if you skip the video, nothing is deleted. That is the whole business model.

There is no paid tier. Every feature is in the free app; the ads are the price.

The app never asks for payment. Ads are served by Google AdMob; the app does not ask to track you.