YoonSTT: Fast STT Converter

Create accurate subtitles from video or audio with ease.

This app is a SwiftUI-based iOS subtitle and translation tool designed for creators, students, and professionals who need fast, clean, and editable captions.

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**From media to subtitles — simple and flexible**

• Import videos directly from your Photos library
• Or load audio files such as Voice Memos
• Automatically extract audio from video
• Choose your speech recognition language
• Transcribe using Apple’s on-device speech recognition

Once transcription is complete, your session is saved so you can edit, translate, and export anytime.

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**Translate only when you want**

• Original transcription is generated first
• Select a target language and translate on demand
• View original text and translation side by side
• Keep full control over when and how translation happens

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**Smart subtitle generation**

Transcribed segments are intelligently grouped into readable subtitle units:
• Sentence boundaries and punctuation awareness
• Pause-based segmentation
• Optimal subtitle duration (1–3.5 seconds)
• Two-line layout with balanced line breaks
• Export-ready formatting for professional use

Supported formats:
• SRT
• VTT

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**Edit, copy, and share**

• Edit original text freely
• Copy subtitles to clipboard
• Share subtitle files directly
• Choose between Original, Translation, or Subtitles views

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**Designed for clarity**

• Clean white background with black text
• Liquid-glass inspired UI containers
• Smooth splash and transition animations
• Portrait-only layout for focused editing

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Whether you’re preparing subtitles for social media, interviews, lectures, or multilingual content, this app helps you go from media to subtitles — quickly and clearly.

Download and start turning speech into subtitles today.