Apple previewed its next major iPhone software as iOS 26 at WWDC in June 2025 and released it in the fall. The label can look surprising after iOS 18, but there are two practical reasons behind it.

What “26” refers to

The version number now maps to the cycle in which the release will be used most. Although iOS 26 ships in late 2025, it is the platform users will run throughout 2026. This model-year style avoids the common situation where an OS named for the release year immediately looks “last year” once the calendar turns.

Why the jump from 18 to 26

Apple has realigned major version numbers across its platforms so a single cycle carries the same identifier. Moving iPhone software to “26” brings it into step with the broader 2026 software family. This makes support, documentation, and cross‑platform conversations less error‑prone than the former mix (for example, iOS 18 alongside other platforms on different numbers).

Note: Apple has not published a lengthy naming policy, but the new label, the timing, and the cross‑platform alignment establish the pattern.

Does this affect iPhone hardware names?

No. Apple has not renamed iPhone hardware to match the software cycle. Phone models continue to use their own product naming and cadence, while the installed software may advance annually (for example, an older iPhone can run iOS 26 if it’s supported).

What it means for users

  • iOS 26 is the 2025 major release you’ll likely run through 2026.
  • Apple says it’s a free update for iPhone 11 and later, with specific device requirements for Apple Intelligence features detailed in the iOS 26 release.
  • Apple Intelligence capabilities and eligibility are outlined on the dedicated product page.

The key takeaway: “26” is a cycle number, not a count of past releases. It reflects the year you’ll primarily use the software and brings Apple’s platforms onto a consistent version track.