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Methodology: Tech Dev Notes snapshots App Store data every 4 hours. Sparklines reflect the last 30 days of recorded snapshots. 7-day deltas compare the latest snapshot to the snapshot closest to 7 days prior. Release cadence is the average gap between consecutive versions in our log. Peer-group comparisons use other apps in the same primary category that we track. None of these numbers come from Apple — they are computed from our tracking data.