Sync podcasts from iPhone to MP3 swim headphones in two minutes
Open source dictation for Mac with local AI, instant speed and complete privacy
Stage
Not given
Not given
Founded
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Based in
DE
RO
Pricing model
Freemium
Paid
Pricing
First sync free. Swimcast Plus: $29.99 one-time lifetime purchase.
One Mac: $15 (or $9 for first 10 buyers); Three Macs: $20; Team (10 Macs): $79. 3-day free trial with everything unlocked. Free updates. 14-day refunds.
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
Dictation into any app with one keyboard shortcut
Local speech processing in about 200 milliseconds
Automatic clean speech with filler word removal
Learn corrections to improve accuracy per user
21 vocabulary packs for specialized fields
Custom vocabulary packs from CSV or JSON files
Notes with searchable history and time-based reminders
Meeting mode with speaker labels and timestamps
Supports 25 European languages
Runs completely offline with no account required
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
Open source GPL-3 code on GitHub you can read, build and verify
Complete privacy with no server, no account, no audio sent anywhere
Fastest local transcription at about 200 milliseconds latency
One-time purchase with free updates and no subscription
Works in terminal, code editors and AI coding agents
Swimcast
Zumbo