Sync podcasts from iPhone to MP3 swim headphones in two minutes
Read along while listening to audiobooks with word-by-word synchronization
Stage
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Founded
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Based in
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Pricing model
Freemium
Free
Pricing
First sync free. Swimcast Plus: $29.99 one-time lifetime purchase.
Free core features including read-along text, device transcription, offline functionality, and public-domain library. Optional Pro upgrade for advanced analytics.
Key features
Find and add podcasts
Choose episodes on iPhone
Sync MP3 episodes to compatible swim headphones
Set playback order before swimming
Works with Shokz OpenSwim, OpenSwim Pro, H2O Audio, FINIS Duo
No Bluetooth required
Two-minute setup
Word-level synchronized text highlighting with 60fps
On-device transcription without cloud upload
Offline playback after single engine download
Support for 99 languages
Import multiple audio formats including MP3, M4B, FLAC, OGG
Accessibility profiles for dyslexia, ADHD, and vision impairment
Built-in library with 20k+ public-domain titles
Quote saving and sharing with generated cards
Reading analytics with neuroscience-based brain score
Character map feature for tracking book figures
What makes it different
Direct iPhone to headphone sync without laptop needed
Built specifically for MP3 swim headphones where Bluetooth fails underwater
Designed for quick two-minute pre-swim preparation
Free first sync to test compatibility before paid option
Set and review playback order on iPhone before syncing
Complete privacy with no account or cloud uploads required
No external lyrics database; transcription generated directly from your audio
Supports your own audiobook files without DRM restrictions
Swimcast