We all know at this Point PI.FYI is a niche app but besides it, what other app you consider it Niche based on your surroundings/friends knowledge etc. Surprisingly for my case it’s : 1. GoodReads. Many people don’t know it even if they are readers. I tend to spend a lot of time there just looking at beautiful covers and searching my next to read book. 2. Soundcloud A lot of the remixes and covers i listen to them over soundcloud, this app is with me since at least 2014. 3. Unsplash I use that app when i want a HD wallpaper from Real photographers (all free no copywrite or anything even if you use it on your socials/posts etc)