Core Insights - Apple has released the adoption data for iOS 26, showing its market acceptance 150 days after its launch on September 15, 2025, based on statistics from February 12, 2026 [1] Group 1: iPhone Adoption Rates - Among iPhone models launched in the past four years, 74% have upgraded to iOS 26, while 20% are still using iOS 18, and 6% are on earlier versions [4] - In comparison, iOS 18 had a 76% adoption rate 127 days after its launch, and iOS 17 also reached 76% after 139 days [4] - The overall adoption rate for iOS 26 across all iPhone models is currently 66%, slightly lower than the 68% for iOS 18 during the same period, but equal to the 66% for iOS 17 [4] Group 2: Factors Influencing Adoption - The lower adoption rate of iOS 26 can be attributed to the lack of support for older models such as iPhone XS, XS Max, and XR, which are now considered obsolete and can only run older systems [4] - User concerns regarding potential declines in battery life and performance have also contributed to a more cautious approach towards upgrading, indirectly slowing the update pace [4]