Apple released fresh iOS and iPadOS usage data after WWDC, showing how fast users adopt new releases. The latest figures cover devices that transacted on the App Store on June 7, 2026. Among iPhones launched in the last four years, 86% run iOS 26, while 11% stay on iOS 18 and 3% use older builds in the broader ecosystem.

When considering every iPhone capable of running iOS 26, 79% already updated, 14% linger on iOS 18, and 7% cling to earlier versions. iPad users mirror the trend: 79% run iPadOS 26, 16% use iPadOS 18, and 5% stick with legacy releases. Adoption lags slightly behind the 2024 releases across all device generations and maintain competitive parity.

Apple’s quarterly update reveals a 12% jump in iOS 26 uptake among recent four‑year models and a 13% rise overall. iPadOS 26 mirrors that growth with 13% and 11% increases, respectively. Still, both systems trail iOS 18 and iPadOS 18 by 2% for new devices and 3% across the fleet, underscoring a modest lag in the competitive landscape.

The data confirms that while iOS 26 adoption climbs steadily, it remains just shy of its predecessor’s penetration. For consumers, the numbers signal that most recent devices already benefit from the new OS, reducing the need for delayed upgrades. For the industry, the slight gap highlights the persistent challenge of driving swift OS migration today overall.