I decided to test one of those anonymous Instagram viewer tools recently and honestly, the experience was pretty solid. The biggest advantage is that you can view private profiles completely anonymously, so the person never finds out you're watching them. You don't even need an Instagram account yourself. Through accountviewer.org, you get access to everything posts, stories, deleted content from months back, followers, following lists, and tagged photos all in one dashboard. It works smoothly on any device without installing anything, and you can download media directly in original quality. The service is secure with proper safety measures, and they have customer support plus occasional free trials.