GameQuant

GameQuant records the App Store top charts every day in 170+ countries and keeps every snapshot, so you can see how an app's rank moved over weeks and months instead of only where it sits today. An app page gives you rank history over 7, 30 or 90 days, ratings history, the star distribution, position country by country, and estimated US downloads and revenue shown as ranges rather than single numbers. It is used by developers checking competitors, ASO teams tracking chart movement, journalists who need a citable chart, and investors following listed app publishers. Free, no signup.