Subly — AI subtitles on device

Auto subtitles for videos

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Turn speech into stylish subtitles in seconds — entirely on your device. No uploads, no waiting. Transcribe, edit, style and export clips with burned-in captions. Subly turns your short videos into caption-ready clips in seconds — and everything happens right on your iPhone. Your video never leaves your device for transcription: speech recognition runs fully offline, powered by Whisper AI. Perfect for Reels, Shorts, Stories and any vertical clip up to a few minutes long. Pick a video from your gallery, get an accurate transcript, polish it, choose a style — and save a finished video with burned-in subtitles back to your gallery. WHY SUBLY • 100% on-device transcription — no cloud, no account, no uploads • Works offline — transcribe on a plane, in the subway, anywhere • Fast: optimized Whisper models tuned for mobile • Multilingual: recognizes speech in dozens of languages POWERFUL SUBTITLE EDITOR • Word-accurate segments synced to your video • Tap any subtitle to fix text, timing or position • Drag, resize and reposition captions directly on the video • Video pauses automatically while you edit — never lose your place BEAUTIFUL CAPTION STYLES • A library of ready-made caption styles, live-previewed on your actual video • Fonts, colors, backgrounds and sizes that look identical in preview and in the final export • Apply a style to one segment or to the whole video at once EXPORT YOUR WAY • Burn subtitles directly into the video and save to your gallery • Share the finished clip to any app • Or export subtitles as SRT / VTT files for use in other editors PRIVATE BY DESIGN Speech recognition happens entirely on your device. Your videos and audio are never sent to a server for transcription. CHOOSE YOUR MODEL Download the Whisper model that fits your needs — smaller for speed, larger for accuracy. Models are stored on-device and work without a network connection. Subly speaks your language: the app interface is available in 34 languages. Got feedback or a feature request? We'd love to hear from you — leave a review or reach out through the support page.

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The developer, Andrei Bialiauski, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Andrei Bialiauski
Size
139.5 MB
Category
Photo & Video
Compatibility
Requires iOS 16.0 or later.
  • iPhone
    Requires iOS 16.0 or later.
  • Mac
    Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
4+
Copyright
© Andrei Bialiauski
  • Developer Website
  • Privacy Policy