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Swimcast syncs podcast MP3s from iPhone to compatible swim headphones like Shokz OpenSwim, OpenSwim Pro, H2O Audio, and FINIS Duo, so swimmers can listen underwater without Bluetooth or a laptop.
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.
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