Zuan

1. On-Device AI Transcription
Transcribe any audio or podcast episode directly on your device using whisper.cpp — no cloud, no subscription, complete privacy. Supports multiple model sizes and parallel chunking for speed on modern devices.

2. Real-Time Synchronized Transcript
Follow along with segment-by-segment highlighting that stays perfectly in sync with playback. GPU-accelerated rendering on iOS 18+ for buttery-smooth highlighting.

3. A/B Repeater & Loop ("The Repeater")
Select any transcript segment and loop it for focused listening. Perfect for language learners, shadowing practice, dictation, or catching hard-to-hear passages.

4. Instant Dictionary Lookup
Long-press any word or phrase in the transcript to instantly look up its definition, pronunciation, and translation using the iOS system dictionary. A game-changer for building vocabulary while listening.

5. Accessibility-First Font Options
Switch between four curated fonts — System (San Francisco), OpenDyslexic, Lexend, and Atkinson Hyperlegible — to match your reading comfort and accessibility needs.

6. Transcript Export (SRT / VTT / TXT)
Export your AI-generated transcripts in SRT, WebVTT, or plain TXT format. Perfect for language learners who want to create flashcards, import text into study apps like Anki, or keep a personal archive of their favorite podcast segments.

7. iCloud Subscription Sync
Podcast subscriptions sync seamlessly across all your devices via CloudKit. Subscribe on your iPhone, and it appears on your iPad automatically.

8. Share Extension & AirDrop Intake
Send audio files to Zuan from any app via iOS Share Sheet or AirDrop. Files are deduplicated by content hash and imported to your library, where they can be transcribed on-demand.

9. Apple Watch Companion App
Control playback, browse your podcast subscriptions, and listen to episodes directly from your wrist.

10. Chapter Navigation
Browse and jump between chapters embedded in podcasts (via JSON Chapters or embedded media metadata). See chapter titles, timestamps, and durations at a glance.

11. Podcast Search & Discovery
Search for podcasts by name using the iTunes Search API. Browse trending shows and discover new content, then subscribe with one tap.

12. Podcast Subscriptions
Subscribe to any podcast via search. Episodes are fetched, sorted, and displayed with artwork, duration, and playback progress.

13. Offline Downloads
Download podcast episodes for offline listening. Background downloads continue even when the app is in the background, with progress tracking.

14. Smart Storage Management
View detailed storage breakdowns (downloads, cache, free space). Configure auto-delete rules for played episodes with customizable grace periods and storage limits.

15. Variable Playback Speed
Adjust playback speed from 0.5× to 3.5× with a tactile scroll-dial UI and quick-access preset buttons. Speed persists across sessions — essential for adjusting difficulty.

16. Sleep Timer
Set a sleep timer for 5 to 60 minutes, or have playback stop at the end of the current episode.

17. Local Media Library
Import and replay audio files from your device. Library persists across sessions with deduplication by content hash. Swipe to delete individual items or clear all.

18. Playback Position Memory
Resume exactly where you left off. Playback position is saved per podcast episode and per library item, persisted across app launches.

19. Dark Mode & Theming
Full dark mode support with a cohesive design system. Semantic colors and consistent typography throughout the app.