Home Screen
The big save button, center-stage in the app.
Rewind · iPhone · Private by design
Save the last
Save the last
few minutes of
audio — after
the moment.
Rewind keeps a short, on-device rolling buffer of what your microphone just heard. When something worth keeping slips past, press once — and it's saved, transcribed, and searchable on your phone.
Works on iOS 18 or later
Action button, Siri & Shortcuts
Local transcription included
REWIND
Listening in the
background
Listening
Stop
Save last 5 min
Or press the Action button
Recent moments
3 saved Grandma's butter recipe
04:32 · TUE 2:14 PM
What it does A microphone that remembers
A microphone that remembers
what you didn't.
One button. On-device. Rewind quietly maintains a short audio buffer — so you can reach back in time when a moment turns out to matter.
01 · Rolling buffer
A rolling record, never kept unless you ask.
Rewind writes 60-second AAC segments into a private cache. Anything past your save window is overwritten. Nothing leaves the phone.
5:00 ROLLING BUFFER
WINDOW PRESETS
1 min 3 min 5 min 10 min 15 min
02 · Background
Keeps the buffer alive when the phone is locked.
Backgrounded, screen off, in a pocket — Rewind continues to hold the last few minutes, watchdog-monitored and route-aware.
03 · Transcription
Whisper, locally.
Every saved clip is transcribed on-device using WhisperKit. Speaker labels are optional. Titles are drafted for you.
[Speaker 1] So the trick is the brown
butter — you want it to smell
nutty, not burnt. Let it sit
butter — you want it to smell
nutty, not burnt. Let it sit
04 · Entry points
Save a moment from anywhere.
Home screen, Action button, Shortcuts, Siri, Spotlight — five paths, one intent.
Action Button Shortcut → Save Rewind ⚡︎
Siri "Hey Siri, save Rewind" ◦
Spotlight Capture Rewind ⌘
05 · Library
Search, star, trim, share.
Saved clips are grouped by day, searchable by transcript, title, status, or date. Face ID can gate the whole Library so your moments stay yours.
Dad's story about the farm
12:08 · SAT 7:42 PM
Standup — sprint 14 blockers
04:12 · THU 10:05 AM
The toast at the rehearsal dinner
03:47 · FRI 9:21 PM
How it works One button. Three
One button. Three
moving pieces.
No cloud round-trip. No upload queue. Rewind's capture path is built to be boring, predictable, and quiet.
STEP 01
Start listening, once.
Tap start. Rewind requests the microphone and begins rotating 60-second segments into a private rolling buffer — resumable across locks, calls, and route changes.
Listening
Stop
STEP 02
Save the moment that just happened.
Press once — from the app, the Action button, Siri, Spotlight, or Shortcuts. Rewind finalizes the current segment and stitches the window into a clip.
Save last 5 min
STEP 03
Review, trim, search.
Clips land in your Library with an on-device transcript and a generated title. Scrub, trim, star, or share — all from the phone.
Save from anywhere Five ways to capture
Five ways to capture
what you almost lost.
Rewind is wired into every system-level intent iOS offers for "do a thing, right now." Pick the one that fits your hand.
Action Button
Assign "Save Rewind" as a one-press Shortcut.
Siri
"Hey Siri, save Rewind." Works from the lock screen.
Spotlight
Swipe down, type Rewind, hit return.
Shortcuts
Chain Save Rewind into any automation.
Privacy, not a promise
Your audio stays on the phone — because it never leaves it.
Rewind has no upload path. There is no server. There is no account. Saved clips and rolling-buffer segments are written to the app sandbox with file protection.
The only expected network call is the first-run download of the local Whisper model from Apple's open-source mirror. After that, transcription runs entirely offline.
No account No cloud Face ID gate Local transcription
WHERE DATA LIVES
Saved clips Documents/Recordings DEVICE
Rolling buffer Caches/RollingBuffer DEVICE
Transcripts SwiftData → AudioClip DEVICE
Whisper model argmaxinc/whisperkit DEVICE
Sharing Only when you tap share EXPLICIT
FAQ
The questions everyone asks.
Straight answers about capture, battery, permissions, and what Rewind will and won't do.
Is Rewind always recording?
Only when you start it. While listening, it keeps a rolling buffer of the last few minutes and continually overwrites anything older. A clip is only written to your Library when you explicitly save.
Does Rewind send audio to the cloud?
No. There is no upload path in the app. Transcription runs locally with WhisperKit. The only network call is the first-run model download.
Does it keep running when the phone is locked?
Yes, thanks to iOS's background audio mode. A watchdog keeps the recorder healthy through route changes, interruptions, and media-service resets.
How big is the save window?
You pick: 1, 3, 5, 10, or 15 minutes. When you save, Rewind stitches only the overlapping portion of the buffer into a single .m4a.
What about speaker labels?
Optional. When on, SpeakerKit diarization maps speakers onto transcript segments; if it can't, you still get the transcript with a fallback notice.
Can I lock the Library?
Yes. Turn on Face ID / device authentication and Rewind will gate the Library and clip details every session and on scene changes.
Never miss
a moment.
Install Rewind, start listening once, and let your phone remember the last few minutes for you. You decide what's worth keeping — after it's already happened.