Public data. Independent perspective.
We collect public App Store RSS feeds, published by Apple. An app’s position in the response is its rank. We are an independent service and are not affiliated with Apple. Explore Apple’s RSS Builder ↗
THE NUMBERS, EXPLAINED
A clear view.
An honest picture.
Useful insights start with knowing what the data can tell you—and where it stops.
The right cadence for each market.
Ten leading markets are checked every hour: United States, United Kingdom, Japan, China, Germany, France, Canada, Australia, South Korea, and India. Ten additional markets are checked daily. All times are shown in UTC. Updates can be delayed by source availability.
Movement, measured consistently.
Change equals earlier rank minus current rank within the same country, device, chart, and category. For 24 hours, 3 days, or 7 days, we use the most recent successful observation at or before the target time, allowing a tolerance of 1.5 collection intervals. Positive means climbing. Each chart retains its own comparison timestamp.
New isn’t a made-up number.
“New” means an app is in the current chart but absent from the comparison snapshot. It may be returning to the chart. “No history” means no valid comparison exists. Neither is assigned a numeric increase; comparable changes sort first.
Gaps are part of the story.
An app can leave the observed chart, a feed can fail, or collection may not have started. These observations remain blank. We never treat an unranked app as rank zero or connect a line across a missing sample. Historical data begins when tracking starts and is retained for 30 days by default.
Coverage has boundaries.
We request the top 100 entries per chart, but Apple may return fewer. Category coverage is curated and configurable; the legacy iPhone chart is Apple’s general applications feed. Daily markets cannot show hourly detail. Ranking is not a measure of downloads or revenue. Google Play is planned; no Google Play data is collected yet.