tvOS 27: on-device AI subtitles and on-screen text size adjustment

tvOS 27 brings locally generated subtitles from an on-device AI model directly on Apple TV, without sending audio to the cloud, and introduces on-screen text size adjustment.

Apple TV learns to read content on its own

tvOS 27 stands out for a substantial accessibility feature: subtitles generated by an on-device AI model directly on the device, without connecting to remote servers. AppleInsider reports that the feature — defined as "on-device AI subtitles" — allows Apple TV to generate real-time captions for any video content, including those without official subtitle tracks. Local processing ensures audio never leaves the device, in line with the privacy-first approach Apple declared for the entire suite of AI features presented at WWDC 2026.

The second announced tvOS 27 feature is on-screen text size adjustment, a basic accessibility function that had been missing from the TV operating system. It's a gap that many elderly users or those with visual difficulties had flagged for some time, and the fact that it arrives without particular fanfare speaks volumes about how much this segment of the ecosystem receives attention only at the margins.

tvOS 27 also brings a redesigned Podcasts app — already covered previously — but the overall set of new features confirms that Apple is trying to raise the quality of its big-screen software in a more systematic way than previous versions.

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