iOS 27 Generated Subtitles auto-captions video for the viewer, not the post. Kompozy burns in captions and publishes across 9 platforms. The honest 2026 split.
Published 2026-09-11 · Updated
Short answer
iOS 27 Generated Subtitles is an Apple accessibility feature that transcribes uncaptioned video on the device and shows subtitles while you watch. It is built into the OS and private, and at launch it covers English in the US and Canada. The subtitles show at playback for the viewer. Creators who need captions burned into the videos they post should use Kompozy, which writes them into the file.
Key takeaways
If you searched "iOS 27 Generated Subtitles alternative," first be clear about what the feature is, because it's genuinely good at its actual job. Generated Subtitles is an accessibility feature in iOS 27 that automatically transcribes any uncaptioned video and shows subtitles during playback, using on-device speech recognition so nothing is uploaded. For a viewer — someone watching sound-off, or a deaf or hard-of-hearing user — it's a free, welcome upgrade, and nothing here pretends otherwise.
I run Kompozy, so weigh that. But the reason a creator looks for an "alternative" is almost always the same realization: they assumed iOS 27's auto-captions would caption the videos they publish, and they don't. The subtitles are painted on the watcher's device at playback and are never written into the file. Export the clip or post it and the captions are gone — and at launch they only appear for English-speaking viewers in the US and Canada anyway.
So this isn't "which is better." It's "does the caption travel with your content." Generated Subtitles is a viewing aid: the caption lives on the screen, in the moment, for a subset of viewers. Publishing needs the opposite — a caption baked into the video, styled for your brand, sized for each platform, seen by everyone. That is a production job the feature never attempts, and it's the gap Kompozy fills.
Everything below reflects Apple's launch-window disclosures for iOS 27 as of September 2026. Treat device requirements, supported languages, and regions as a moving snapshot and confirm on Apple's pages. No invented weaknesses — Generated Subtitles is simply a consumption feature by design, not a caption-authoring or publishing tool.
Generated Subtitles is a systemwide iOS 27 feature (also in iPadOS 27, macOS 27, tvOS 27, and visionOS 27) that transcribes the spoken audio of any video lacking its own caption track and displays subtitles automatically during playback. It runs on-device with Apple's speech recognition, so the audio isn't sent to the cloud and captions are generated privately. It covers videos you record on iPhone, videos friends and family send you, and videos streamed online, so it can caption a clip in Photos, Messages, a social feed, or a streaming app. Viewers can adjust how the subtitles look from the playback menu or in Settings. At launch it is English only and limited to the United States and Canada. What it does not do: export a subtitle file, let you edit the transcript, style captions for a platform, or write captions into the video — the subtitles exist only as an overlay on the watching device.
You'd look past Generated Subtitles the instant your goal shifts from watching a video to publishing one. It produces no artifact you can post: the captions are viewer-side, so a clip you export arrives caption-less, and even on-device they only appear for English viewers in two countries. It doesn't clip a long recording into vertical shorts, it doesn't style or animate captions or keep them inside a platform's safe zone, it doesn't generate carousels, quote cards, blogs, or avatar video from the same source, and it publishes and schedules nothing. None of that is a flaw — it's simply outside what an accessibility overlay is for. But a creator whose bottleneck is "I have one recording and need a week of captioned, on-brand posts across TikTok, Reels, Shorts, LinkedIn, and a blog" needs a generation-and-publishing engine, not a viewing aid. That's where Kompozy comes in.
| Feature | iOS 27 Generated Subtitles | Kompozy | Note |
|---|---|---|---|
| On-device, private transcription (no upload) | Yes | No | Generated Subtitles runs locally — a real privacy win for viewing. Kompozy is a cloud engine that transcribes to power clipping and captions, not an offline transcriber. |
| Automatic captions while watching | Yes | N/A | Apple's feature captions video you watch. Kompozy captions video you publish; they solve opposite sides of the screen. |
| Captions burned into the video file | No | Yes | This is the core difference. Kompozy writes word-synced captions into the pixels so every viewer sees them on any device; iOS 27's overlay does not travel with the file. |
| Branded caption styling + animation | No | Yes | Kompozy applies a caption style, animation, and color to match your brand. Generated Subtitles offers viewing appearance settings only. |
| Per-platform sizing / safe-zone placement | No | Yes | Kompozy sizes and places captions for each platform's 9:16, 1:1, or 16:9 safe zones. The OS overlay has no concept of a platform. |
| Clip a long video into captioned vertical shorts | No | Yes | Kompozy Clipped Shorts finds the strongest moments and cuts captioned 9:16 shorts. Generated Subtitles does no editing. |
| Generate net-new video (persona / avatar, VFX) | No | Yes | HeyGen-powered Persona Shorts, Persona HeyGen, and VFX hooks — video the feature never produces. |
| Multi-format generation (carousels, images, blogs, newsletters) | No | Yes | One source fans into up to 20 formats in Kompozy. Generated Subtitles produces nothing but an on-screen overlay. |
| Brand-voice governance across a batch (Persona Brief) | No | Yes | Kompozy holds every output to one brief so a channel reads as one brand. |
| Schedule + publish across platforms | No | Yes | Kompozy publishes across the eight social platforms plus blog and email with autopilot and a review pipeline. The feature publishes nowhere. |
| Language / region coverage | English, US & Canada at launch | English-first, many languages | Generated Subtitles is English-only in two countries at launch. Kompozy generates copy in many languages but is English-first and not validated for every locale. |
| Price | Free with iOS 27 | Subscription (credits) | The feature is free because it's a viewing aid. Kompozy is a subscription priced by generation volume because it produces and publishes content. |
| Tier | iOS 27 Generated Subtitles plan | iOS 27 Generated Subtitles price | Kompozy plan | Kompozy price |
|---|---|---|---|---|
| Entry | iOS 27 Generated Subtitles | Free (bundled with iOS 27) | Kompozy Starter | $199/mo (5,500 credits) |
| Mid | iOS 27 Generated Subtitles | Free (no paid tier) | Kompozy Pro | $499/mo (18,000 credits) |
| Top | iOS 27 Generated Subtitles | Free (no paid tier) | Kompozy Enterprise | Contact Sales |
Generated Subtitles and Kompozy sit on opposite sides of the same video. Apple's feature is for the person watching: it captions any uncaptioned clip on-device, privately, for free — and the caption lives on that viewer's screen, in English, in two countries, and never touches the file.
Kompozy is for the person publishing. It takes a raw recording, transcribes it, cuts it into captioned vertical shorts, and burns word-synced captions into each cut with your brand's style and per-platform placement — captions written into the pixels, seen by every viewer everywhere.
From the same source it builds brand-exact carousels, quote graphics, a blog article, and a newsletter, all held to one Persona Brief so a whole channel reads as one voice, then schedules and publishes the batch across the eight social platforms plus blog and email behind a per-post review. If you're watching video, keep Generated Subtitles on. If you're building an audience with video, Kompozy is the engine that turns one recording into captioned posts that ship everywhere.
A real output from the Kompozy workspace: a Persona short with burned-in captions. It shows captions written into the video itself, so every viewer sees them on any platform.
Best for:
Not ideal for:
Only for the publishing job, and it's honest to say so. Generated Subtitles captions video you watch; Kompozy captions video you publish. If you want automatic captions while viewing, keep Apple's feature. If you want captions burned into a video you post across platforms, that's Kompozy.
Because Generated Subtitles renders subtitles on the viewer's device during playback — they are not written into the video file. When you export or upload the clip, the captions don't travel with it. To caption a published video, the captions must be burned in, which is what Kompozy does.
No. Apple's edge is on-device, private transcription for viewing. Kompozy is a cloud engine that transcribes to power clipping and burned-in captions and then publishes; it is not an offline viewing overlay. They optimize for different things.
Yes. Kompozy burns word-synced captions into the video with a chosen style and animation and sizes them for each platform's safe zone, then publishes the clip. Generated Subtitles offers viewing appearance settings only and doesn't size or ship anything.
Generated Subtitles is English only and available in the US and Canada at launch. Kompozy generates copy in many languages but is English-first and not validated for every locale; for captions that reach a global audience, it burns them into the file rather than relying on a viewer's OS.
We checked every competitor figure and feature claim on this page against the sources listed below on 2026-10-23, and removed or rewrote anything we could not confirm. Feature, device, language, and region details come from Apple's own announcement. Kompozy plan details come from kompozy.io/pricing.
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