Caption Craft - AI Video Subtitle Generator for iOS

Caption Craft – AI subtitles for every video

Caption Craft is a complete iOS app that turns speech into perfectly timed subtitles. Pick a video, let OpenAI Whisper transcribe it, choose one of 18 caption styles and export – in more than 50 languages. Launch your own subtitle app on the App Store in days instead of months.

Try it before you buy: Download the live app on the App Store

Accurate AI transcription with OpenAI Whisper

Caption Craft uses the OpenAI Whisper API to recognize speech in more than 50 languages. Subtitles are created automatically and can be translated with one tap – perfect for creators who publish for an international audience.

18 caption styles, ready to use

From clean and minimal to bold social-media looks: 18 subtitle styles are included. The video editor with timeline controls lets your users fine-tune every line before they export.

Sign-in, cloud sync and monetization included

Apple and Google Sign-In run on Firebase Authentication, and the video history is synced across devices with Firestore. AdMob is already integrated, so your app can earn money from day one.

Here are the key features of Caption Craft:

• AI transcription – OpenAI Whisper speech recognition
• 50+ languages – transcription and advanced translation
• 18 subtitle styles – ready-to-use caption designs
• Video editor – timeline controls to adjust every subtitle
• Apple & Google Sign-In – via Firebase Authentication
• Cloud sync – video history across devices with Firestore
• AdMob monetization – ads included and ready to configure
• Modern dark UI – built with SwiftUI (MVVM)
• App Store & privacy compliant – including tracking usage description
• Video formats – MP4, MOV, AVI, MKV, M4V

What’s included

• Complete Xcode project (Swift & SwiftUI, MVVM)
• Step-by-step documentation
• 16-minute setup video
• Updated privacy policy & terms

F.A.Q.

• Do I need a Mac?
  Yes. iOS apps are built with Xcode, which runs on macOS.
• Do I need an OpenAI API key?
  Yes. Transcription uses the OpenAI Whisper API with your own key – OpenAI bills the usage directly to you.
• Do I need Firebase?
  Yes, for sign-in and cloud sync. Creating a Firebase project is free, and the setup is explained step by step.
• Can I try the app first?
  Yes – Caption Craft is live on the App Store (link above).
• Is there a setup video?
  Yes, a 16-minute setup video is included.
• Which video formats are supported?
  MP4, MOV, AVI, MKV and M4V.
• Can I publish the app under my own brand?
  Yes. Change the name, icon and colors and publish it with your own Apple Developer account. Please check the Envato license terms to choose the right license for your app.

Requirements

• Mac with Xcode 15 or newer
• iOS 17+ target
• Apple Developer account (to publish on the App Store)
• Firebase project (free to create)
• OpenAI API key
• Optional: Google AdMob account

Changelog

v1.2.0 [December 2025]

New: OpenAI Whisper API integration
New: Firebase Authentication & Firestore integration
New: Apple and Google Sign-In
New: cloud sync for video history
New: advanced translation (50+ languages)
New: caption styles expanded to 18
New: 16-minute setup video
Improvement: transcription quality for multiple languages
Improvement: general performance and stability
Update: documentation, privacy policy & terms

v1.1.1 [October 2025]

New: complete UI redesign (modern dark theme)
Improvement: video editor and timeline controls
Improvement: performance and memory optimizations
Fix: bug fixes and stability improvements

v1.1.0 [October 2025]

Update: App Store compliance
New: AdMob tracking usage description

v1.0.0 [September 2025]

Initial release on CodeCanyon
AI-powered subtitle generation
Multi-language support

Support

Questions before or after buying? Use the Comments tab of this item or write to sami.dev.studioo@gmail.com. More templates: SamiDevStudio portfolio.