Search position
The app’s position in up to 200 results returned by Apple’s public iTunes Search API, for a keyword and country. This is not a verified organic iPhone rank. “Not found” means absent from the returned list, not necessarily below position 200.
Popularity
Apple’s 1–100 relative search popularity score for the most recent available complete week. We refresh weekly and display its reporting date. Missing terms show “Unavailable”; we never substitute zero or an invented volume.
Estimated difficulty
A transparent heuristic, not a prediction: 70% rating-count strength and 30% exact keyword phrase matches in titles, averaged over the top 10 returned apps. Rating strength is log10(rating count + 1) / 6, capped at 1. The combined score is multiplied by 100. Brand strength, conversion, downloads, and personalized results are not measured.
Collection and history
Scheduled snapshots are retained for the configured rolling window. Manual refresh reuses results less than 15 minutes old. A dash means we don’t have enough observations yet. Missing days are not interpolated. CSV export contains up to the latest 400 snapshots per tracked keyword.