{"license":"https://creativecommons.org/licenses/by/4.0/","dataset":"markets","count":1,"filters":{"market":"us-mobile-operating-system-usage","matched":true,"marketId":"mkt-mobile-os","slug":"us-mobile-operating-system-usage","name":"U.S. mobile operating-system web usage"},"rows":[{"id":"mkt-mobile-os","slug":"us-mobile-operating-system-usage","name":"U.S. mobile operating-system web usage","shortName":"Mobile operating systems","geography":"United States","sector":"Digital platforms","dataVintage":"2026","naicsCode":"513210","industryHref":"/industries/513210","crosswalkHref":"/markets/economy?bridgeMarket=us-mobile-operating-system-usage&bridgeNaics=513210#market-industry-crosswalk","latestHhi":5337,"concentrationClass":"highly_concentrated","cr4":100,"topFirmShare":63.08,"hhiAtOrAbove2500":true,"hhiDisclosureGap":false,"dataStatus":"estimated_public","confidenceLevel":"medium","sourceCount":1,"policySourceCount":0,"policyEventCount":0,"reportCount":1,"briefAction":"Test whether the dominant firm controls access, switching, pricing, defaults, distribution, or other chokepoints that weaken consumer choice.","briefActionLevel":"Immediate review","briefChange":"HHI rose by 180 points from 2023 to 2026, moving from 5,157 to 5,337.","briefComparisonDelta":180,"briefComparisonDirection":"increased","briefComparisonFromYear":2023,"briefComparisonMetric":"hhi","briefComparisonToYear":2026,"briefEvidence":"1 record in the evidence custody chain, 9 latest share rows, 0 linked official records, and 1 related brief support this profile. Status is estimated public with medium confidence.","briefEvidenceState":"measured_hhi","briefGuardrail":"This brief summarizes the observatory's published market screen. It does not define a legal antitrust market, establish market power, identify anticompetitive conduct, estimate consumer harm, or convert descriptive concentration into a causal claim.","briefHeadline":"Mobile operating systems: highly concentrated, with observed HHI up 180 points.","briefHref":"/markets/us-mobile-operating-system-usage#overview","briefQuestion":"Does the observed usage structure persist in revenue, switching, access, quality, and conduct evidence under a legally relevant market definition?","briefSourceIds":"statcounter-mobile-os-us-2026","briefStructure":"The latest 2026 screen reports HHI 5,337, classified as highly concentrated. iOS leads the sourced distribution at 63.1%. The four largest named participants account for 100.0%."}]}