Swimcast is an iPhone app for swimmers who want fresh podcasts on MP3 swim headphones without using a laptop.
Bluetooth does not work underwater, so devices like Shokz OpenSwim, OpenSwim Pro, AfterShokz Xtrainerz, H2O Audio TRI-style players, FINIS Duo, and similar waterproof MP3 players rely on local audio files. Swimcast makes that workflow phone-first: add podcasts, pick episodes, review playback order, connect compatible headphones, and sync directly to the device folder through iOS.
It is built around the last few minutes before a swim, when dragging files from a computer is too much friction. Swimcast is independent and is not affiliated with Shokz, H2O Audio, FINIS, Sony, or any other headphone maker.
Key points:
- Sync podcast episodes from iPhone to compatible MP3 swim headphones.
- Reorder the playback queue before syncing.
- Works with devices that appear as writable storage in the iOS folder picker.
- Free download with optional Swimcast Plus lifetime unlock.

