SubFlow - AI Subtitle Player

AI Subtitles, Bilingual Video

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Watch your own videos with on-device AI subtitles. Connect to your NAS for free, then unlock bilingual viewing, subtitle editing and SRT, VTT, ASS or TXT export with Pro. Spend less time looking for subtitles and more time watching. SubFlow is a video player for iPhone and iPad that turns speech into readable subtitles on your device. Watch saved lectures, language lessons and your own video collection with complete sentences designed to stay ahead of playback. YOUR VIDEOS, WITH SUBTITLES Open videos from Files or connect to your own WebDAV, SMB, FTP/FTPS, Emby or Jellyfin server. Play existing embedded or external subtitles, or generate subtitles from the audio. Network browsing and playback are included for free. START FOR FREE Play full videos with no playback time limit. Generate automatic subtitles for the first 10 minutes of each video, adjust subtitle size, position, black outline and background opacity, and shift subtitle timing. The recognition limit does not shorten playback or existing subtitle tracks. Subtitle file export requires Pro. GO FURTHER WITH SUBFLOW PRO - Generate automatic subtitles beyond the free 10-minute limit. - View original text and translation together with bilingual subtitles. - Edit subtitle text and timing, and use AI-assisted timing alignment. - Customize advanced styles and save presets. - Export SRT, VTT, ASS and TXT subtitle files without SubFlow attribution. - Queue multiple videos for transcription, with pause and resume. Batch processing works best with SubFlow in the foreground; continuous background transcription is not guaranteed. Video export is not currently available. BUILT AROUND YOUR PRIVACY Speech recognition runs on your device. No SubFlow account, no ads and no usage tracking. We do not upload your audio or video to our servers. Use supported Apple translation on your device, or configure your own API service for translation and sentence refinement. If you enable your own service, subtitle text and necessary context are sent to that provider using your API key. Audio and video are not sent. The provider's terms and fees apply separately. REQUIREMENTS Requires iOS 26 or iPadOS 26 or later. Recognition and translation depend on device capability, supported languages and installed models. Supported local processing can work offline once files and required models are downloaded. Network sources and API services need a connection. DRM-protected content is not supported. Media is supplied by you. SUBSCRIPTION DETAILS SubFlow Pro is available as a monthly or annual auto-renewable subscription with the same features. Prices are shown before purchase. Payment is charged to your Apple Account. Subscriptions renew automatically unless canceled; manage or cancel them in your Apple Account settings. Existing subtitles and translations are kept when Pro expires. New processing returns to free limits, and exporting again requires an active subscription. Privacy Policy: https://bo-xing.github.io/subflow-site/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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The developer, 博 邢, 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 Not Collected

    The developer does not collect any data from this app.

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    Accessibility

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    Information

    Seller
    博 邢
    Size
    19.8 MB
    Category
    Photo & Video
    Compatibility
    Requires iOS 26.0 or later.
    • iPhone
      Requires iOS 26.0 or later.
    • iPad
      Requires iPadOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 26.0 or later.
    Languages
    English and 7 more
    • English, French, German, Japanese, Korean, Simplified Chinese, Spanish, Traditional Chinese
    Age Rating
    4+
    In-App Purchases
    Yes
    • SubFlow Pro Yearly $12.99
    • SubFlow Pro Monthly $1.99
    • Learn More
    Copyright
    © 2026 Bo Xing
  • Developer Website
  • Privacy Policy

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