--- title: WWDC26: Build a responsive camera app that launches... description: A WWDC26 session from Apple's camera performance team covering four key areas for building fast-launching camera apps on iOS. The main highlight is the new... canonical: https://daily.dev/posts/wwdc26-build-a-responsive-camera-app-that-launches-quickly-apple-a0bjdbvfx twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: WWDC26: Build a responsive camera app that launches quickly | Apple | daily.dev og:description: A WWDC26 session from Apple's camera performance team covering four key areas for building fast-launching camera apps on iOS. The main highlight is the new... og:url: https://daily.dev/posts/wwdc26-build-a-responsive-camera-app-that-launches-quickly-apple-a0bjdbvfx og:image: https://api.daily.dev/og/posts/a0BjDBvFx.png og:image:alt: WWDC26: Build a responsive camera app that launches quickly | Apple og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # WWDC26: Build a responsive camera app that launches quickly | Apple **[Apple Developer](https://daily.dev/sources/appledeveloper)** · 25 min read · 0 upvotes · 0 comments ## Summary A WWDC26 session from Apple's camera performance team covering four key areas for building fast-launching camera apps on iOS. The main highlight is the new Deferred Start API (iOS 26+), which postpones initialization of non-preview capture outputs until after the first preview frame renders, cutting launch time roughly in half. The session also covers best practices for rendering preview using AVCaptureVideoPreviewLayer vs AVCaptureVideoDataOutput, APIs for monitoring hardware cost and system pressure to sustain performance under load, and a new AVProVideoStorage class (iOS 27) that provides deterministic file write performance for high-data-rate ProRes video captures. Practical guidance includes splitting UI initialization into critical and deferred phases, avoiding blocking calls on the main thread, and using responsive capture alongside deferred start to avoid missing shots. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Issue 755 – iOS Dev Weekly](https://daily.dev/posts/issue-755-ios-dev-weekly-8oqjqlsun) · iOS Dev Weekly · 0 upvotes · 0 comments --- Tags: [#ios](https://daily.dev/tags/ios), [#swift](https://daily.dev/tags/swift) [View this post on daily.dev](https://daily.dev/posts/wwdc26-build-a-responsive-camera-app-that-launches-quickly-apple-a0bjdbvfx) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"WWDC26: Build a responsive camera app that launches quickly | Apple","url":"https://daily.dev/posts/wwdc26-build-a-responsive-camera-app-that-launches-quickly-apple-a0bjdbvfx","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/wwdc26-build-a-responsive-camera-app-that-launches-quickly-apple-a0bjdbvfx"},"datePublished":"2026-06-08T21:25:18.804Z","dateModified":"2026-06-08T21:32:19.882Z","description":"A WWDC26 session from Apple's camera performance team covering four key areas for building fast-launching camera apps on iOS. 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