App Store charts, measured
What the US App Store charts actually do, written from the daily crawl behind this site. Chart position and public rating counts only — no download or revenue estimates.
How much of the App Store top 100 changes each day
Several hundred apps join a US App Store top-100 chart overnight, and most of them are small. Here is what daily chart turnover actually looks like.
Which App Store categories are easiest to chart in
Category difficulty, measured by how few ratings the incumbents actually carry and ranked live from daily US App Store chart data. No download estimates.
What Apple tells you about your App Store rank
App Store Connect reports impressions, downloads and conversion — but never your chart position. Here is exactly what is missing, and how to fill the gap.
How we decide an App Store rank move is worth an email
Most day-to-day rank movement is noise, not news. Here is the threshold, cooldown and flap logic that decides which App Store chart moves earn an email.
Want this for your own app?
Look up any iOS app to see its current chart position and daily history.