Common cases
- WhatsApp voice notes — export the .opus/.ogg, drop it in, share the cleaned MP3.
- iPhone Voice Memos — long-press → Share → CleanCast in Safari.
- Meeting notes — clean up a phone-recorded meeting before running it through a transcription tool. Fewer noise-related errors.
- Field interviews — take the raw recording home, clean once, use it anywhere.
Why on-device matters here
Voice notes are often personal. They're your own thinking, meetings that aren't public yet, or interviews you promised to keep private. Uploading them to a website feels wrong. With CleanCast, the file loads into your phone's browser, gets cleaned there, and never touches a server.
Install once, use forever
Tap the browser's share menu and "Add to Home Screen" — CleanCast lives on your phone like a native app and even works offline. Same free forever, no subscription, no watermark.