On-device · Mac & iPhone · Now on the App Store

Record any conversation. Keep every word on your device.

Notes you'll actually re-read — a clean transcript with who said what, and the full audio kept so you can replay any moment. It all runs on your Mac or iPhone, so nothing leaves your device. Summaries are opt-in, and only the transcript text ever travels.

  • Every speaker labeled — who said what
  • Audio never uploads
  • Works offline
  • One purchase · Mac & iPhone
Synopsule on macOS: a recording library next to a labeled transcript and an opt-in AI summary
Synopsule on iPhone: the same kind of transcript with colored speakers and a playback bar
100%of transcription runs on your device
0 KBof your audio is ever uploaded
2devices, one app — your Mac and iPhone
$1.99one-time purchase. Both devices. No subscription.
Why it's different

The difference is where your audio goes.

You leave with notes you'll actually re-read — every speaker labeled, the full audio kept so you can replay any moment, and files any AI can open. Most meeting tools get you there by shipping the recording to their servers. Synopsule does the whole job on the device that recorded it. No bot. No account. No upload.

Synopsule
Typical cloud notetaker
Where audio is processed
On your Mac or iPhone
Uploaded to their servers
Account & sign-up
None needed
Required
How it captures a call
Taps system audio on Mac, no bot
A bot joins your meeting
Who said what
Every speaker labeled, on-device
Not distinguished
What you can replay
The full audio, kept on device
Nothing — the audio is discarded
Your notes
Open Markdown any AI agent can read
Locked in their app
Recognizes returning speakers
On-device voiceprints
Cloud-side voice profiles
Works offline
Yes, from first launch
No, needs the cloud
AI summaries
Opt-in — your key or Pro
Always on, in their cloud
What happens to your audio
Stays on device; raw deleted
Retained in their cloud
Mac & iPhone
One $1.99 purchase covers both
Per-seat monthly plans
Price
$1.99 once, yours forever
$10–30+ / month
The shipped product

One app. Your Mac and your iPhone.

These are real screens, not concept art. The same Synopsule runs on both. Install it once and it's on your desk and in your pocket, with each device doing what it's best at.

Mac The full studio

Your Mac sees the most of any conversation.

  • Records your mic and your Mac's system audio in separate lanes
  • Captures both sides of a Zoom, Meet, or Teams call, with no bot in the room
  • Adds PDF to the export list
  • A roomy workspace with a companion pane that tabs through Summary, Notes, Speakers, and Flags

iPhone In your pocket

The same studio, wherever the conversation is.

  • Records the room through the mic, transcribing live
  • Built for interviews, lectures, table talk, and voice notes
  • Set the speaker count first for sharper labels
  • Share-sheet export — Word, Markdown, HTML, SRT, VTT, or into Obsidian and Apple Notes

Both Identical where it counts

One codebase, one install, the same promise.

  • Whisper transcription that runs entirely on-device
  • Recognizes returning voices and labels them — on-device
  • Tap any line to play it; drop time-anchored notes and flags
  • Full-text search across every transcript
  • Templated, opt-in summaries — your key, on-device, or Synopsule Pro

On the Mac

The full studio
Synopsule on macOS: library, a labeled transcript, and an opt-in AI summary side by side Synopsule speakers directory on macOS, tracking people across transcripts Synopsule recording on macOS with separate mic and system-audio level meters Synopsule export sheet on macOS with Word, PDF, Markdown, HTML, SRT, VTT and a live preview Synopsule privacy settings on macOS: local-by-default recording and transcript-only retention Synopsule global search on macOS returning matches across every transcript
  1. 01

    Library, transcript, and summary — together.

    Pick a recording on the left, read the labeled transcript in the middle, and an opt-in AI summary sits right beside it.

  2. 02

    A directory of every voice.

    Speakers follow people across your recordings — and Synopsule recognizes returning voices, labeling them automatically. Rename someone once and it updates everywhere — transcript, search, and exports.

  3. 03

    Your mic and the call, in separate lanes.

    Core Audio taps record your microphone and system audio independently — both sides of a Zoom, with no bot in the room.

  4. 04

    Exports that fit where the work lives.

    Word, PDF, Markdown, HTML, SRT, and VTT — or one tap into Obsidian or Apple Notes — with a live preview, and speakers and timestamps kept intact.

  5. 05

    Local by default — and you can see it.

    Recording stays on the device, raw audio is deleted after transcription, and summaries only run when you ask.

  6. 06

    Find the moment across everything.

    Full-text search spans every transcript, with speaker: filters to jump straight to a voice.

On iPhone

In your pocket
Synopsule iPhone library listing recordings with speaker avatars and durations Synopsule iPhone transcript with colored speakers, timestamps, and a playback waveform Synopsule iPhone recorder with a time-anchored Notes field and a flag button while capturing live Synopsule iPhone speaker roster showing two voices auto-recognized from earlier recordings, each marked Suggested to confirm or rename Synopsule iPhone full-text search across transcripts with match counts Synopsule iPhone privacy settings: on-device model, analytics toggle, AI consent
  1. 01

    Every recording in one place.

    Starred, drafts, and the full archive — the people in each one shown at a glance.

  2. 02

    See who said what.

    Colored speakers, timestamps, and a tap-to-play waveform for any line of the transcript.

  3. 03

    Notes and flags, as you record.

    Jot time-anchored notes and drop a flag while you talk — tap either later to seek right back to the moment. The live transcript runs underneath, and nothing leaves the phone.

  4. 04

    Names that stick — and recognize.

    Name a voice once and Synopsule recognizes that person in your next recordings on this phone, labeling them automatically — all on-device. Your Mac works the same way.

  5. 05

    Find any moment.

    Full-text search across every transcript, with speaker: filters to jump straight to a voice.

  6. 06

    Privacy you control.

    An on-device model, an analytics toggle, and AI consent you can review or reset whenever you like.

What it does

Built for how conversations actually go.

Long calls. People talking over each other. A hallway chat you wish you'd written down. Synopsule turns all of it into a clean, searchable transcript, with exports that don't need a second app to fix up.

01

Whisper, running on your hardware.

The transcript appears as you talk, accurate and fully offline. A Whisper model ships inside the app, so it works the moment you open it — then download a larger model, up to 1.5 GB, when you want every word right, and keep several on hand to switch between instantly.

  • Transcribes out of the box — a model ships in the app
  • Keep several model sizes, switch instantly with no redownload
  • Works offline, always · built for hour-long sessions
  • macOS 15+ and iOS 17+, tuned for Apple silicon
YouMicrophone
RemoteSystem audio
Whisperon device
02

Capture the call, or the room.

On the Mac, Synopsule records your microphone and whatever is playing through your speakers in separate lanes, using Apple's Core Audio taps. No screen recording, no virtual driver, no bot in the meeting. On iPhone, it records the room through the mic: point it at the conversation and hit record.

  • Mac: both sides of Zoom, Meet, or Teams
  • Mac: separate lanes for you and everyone else
  • iPhone: the whole room through one mic
  • Grant permission once
MicrophoneMacBook Pro
System audioZoom call
03

It learns who's who.

When a recording finalizes, on-device diarization separates the voices — and Synopsule recognizes people it has heard before, labeling them automatically. Name someone once and the next time they speak, they're tagged for you. Correct a wrong guess and it learns. A bundled neural voice model does it all on-device, so the voiceprints never leave.

  • Recognizes returning voices — matched lines show a “Recognized” chip
  • Correct a speaker mid-recording; the fix survives finalization
  • On-device neural voice model — voiceprints never leave
  • Rename once; it propagates everywhere
MayaSpeaker 2PriyaSpeaker 4
"Speaker 2"Jordan12 mentions updated
MayaJordanPriyaSpeaker 4
04

Play it back, synced to the line.

Tap any line to jump straight to that moment. As it plays, the transcript scrolls to keep up. Skim an hour in a minute, then land on the exact sentence you came for. Drop time-anchored notes and flags as you go, and tap any of them to seek right back. The audio stays on the device, and you keep it or delete it.

  • Tap a line to hear it
  • Time-anchored notes and flags — tap any to jump back
  • The active line follows the audio
  • Audio never leaves the device
12:48 / 33:14
MayaEngineering can hit October if we trim scope.
MayaLet's lock the launch date so marketing can start.
JordanI'll send the updated risk register tonight.
PriyaLet me prep customer comms in parallel.
05

Summaries when you ask. Exports that fit.

Pick a template — one-on-one, standup, sales call, interview, lecture, clinical SOAP, legal, or user research — and turn an hour of talk into a structured, speaker-aware recap with owners, tasks, and the questions still open, only when you press Summarize. Run it through your own key, on-device via Ollama or Apple Intelligence so nothing leaves, or Synopsule Pro. Then send the transcript wherever the work lives, with speakers and timestamps intact.

  • Templated, speaker-aware summaries — action items and follow-ups in one tap
  • Your OpenAI, Anthropic, or Gemini key; on-device via Ollama or Apple Intelligence; or Synopsule Pro
  • Export to Word, Markdown, HTML, SRT, VTT, PDF (Mac) — or straight into Obsidian and Apple Notes

Summary

Locked the launch date for October. Engineering will stage the export redesign to fit; marketing starts long-lead comms immediately.

Action items

  • Jordan — send updated risk register tonight
  • Priya — draft customer comms by Thursday
  • Maya — confirm launch date with leadership
.docx.pdf.md.html.srt.vttObsidianApple Notes
Privacy by architecture

Privacy you can diagram.

Not a policy you have to trust, a data path you can follow. Here is everything that happens, and the one thing that can ever leave.

On your Mac or iPhone
1
Record

Mic captured to a temporary file. On Mac, system audio too.

2
Transcribe

Whisper runs locally. Speakers labeled on-device.

3
Finalize

Raw capture deleted. Playback copy stays, delete it any time.

Only if you press Summarize
transcript text only, never the audio
Off device — your choice
Your own API key

Transcript text goes from the app straight to OpenAI, Anthropic, or Gemini. Synopsule never sees it.

Synopsule Pro

One-tap summaries route through our worker to OpenAI. No key to manage, and it works on both devices.

You can also summarize fully on-device — a local model via Ollama on Mac, or Apple Intelligence on eligible Macs and iPhones — so even the transcript text stays put. And if you never summarize, nothing leaves at all.

Read the full Privacy Policy.

Built to hand off

Your transcripts, ready for any AI.

Export to Markdown and you have the format large language models read best — clean headings, labeled speakers, and timestamps, with nothing to tidy up first. Or, on Mac, let Claude, Codex, and ChatGPT read straight from your library through Synopsule's built-in MCP server. Your words, your tools — and the audio still never leaves the device.

launch-review.md Markdown
# Launch Review
May 27, 2026 · 21m · 2 speakers · on-device

## Transcript

**Avery** · 00:00
Let's confirm the source separation before we publish the recap.

**Jordan** · 00:14
Speaker names update across every matching segment as soon
as the user confirms them.

## Summary
- Launch recap aligned; source separation confirmed.
- Exports carry clean timestamps and speaker labels.
  • Structure a model reads on sight — headings, speakers, and timecodes, no copy-paste cleanup.
  • Speaker labels and timestamps ride along, so the AI knows who said what, and when.
  • It's just text. No lock-in and no special importer — paste it wherever you think.
Paste it into
ChatGPTClaudeGeminiObsidianNotionYour own scripts
Built-in · Mac

Or skip the paste — let Claude, Codex, and ChatGPT read your library directly.

Synopsule ships with a built-in MCP server. Two clicks in Settings → Connect to AI Apps and your assistant can list, search, and pull any transcript on demand. Everything runs locally through the Synopsule app itself — there's nothing extra to download, nothing to update, and the connection is read-only. Audio never leaves the Mac.

Talks to
  • Claude DesktopOne-click install from Synopsule
  • CodexApp, CLI, and IDE — one config
  • Claude CodeOne terminal command
  • ChatGPTDrag a Markdown export in, or tunnel
What it can do
  • list_transcriptsRecent recordings with dates, durations, speakers
  • search_transcriptsFull-text search with timestamped excerpts
  • get_transcriptThe full Markdown for one recording
  • get_summaryJust the recap — summary, action items, follow-ups

Try: "What did we decide about pricing on last Thursday's call?" or "Search my transcripts for the Acme launch discussion and summarize what we agreed."

Pricing

One purchase. Both devices. Forever.

Synopsule is a one-time $1.99 on the App Store — the full app with on-device transcription, speakers, playback, exports, and search, on both your Mac and your iPhone. AI summaries are optional and on your terms.

Synopsule

App Store · Mac + iPhone
$1.99one-time
  • On-device Whisper
  • Mic + system audio on Mac
  • Live recording on iPhone
  • Speaker labeling & rename
  • Synced playback
  • Global search
  • Every export format
  • Mac and iPhone, one app
Get it on the App Store$1.99

AI summaries, your way. Bring your own OpenAI, Anthropic, or Gemini key and pay only your provider for what you use, no subscription — or on a Mac, run a local model through Ollama so nothing leaves the device at all. Or add Synopsule Pro for one-tap summaries with no setup: $4.99/mo or $39.99/yr, and one subscription covers both devices. Either way, your audio stays on the device.

FAQ

The honest questions, answered.

Is it one purchase for Mac and iPhone?
Yes. Synopsule is a single universal app, so one $1.99 purchase on the App Store puts it on both your Mac and your iPhone. Add Synopsule Pro and that one subscription works on both devices too.
What's different on iPhone?
The iPhone app records through the microphone, so it's made for in-person conversations, interviews, lectures, and voice notes. The Mac app adds system-audio capture (both sides of a call, no bot) and PDF export. Everything else is the same on both: on-device Whisper, speaker labels, playback, search, and opt-in summaries.
Can Synopsule recognize the same person across different recordings?
Yes. Name a voice once and Synopsule builds an on-device voiceprint for that person, then automatically labels them when they turn up in a later recording. Correct a wrong guess and it learns from the correction. A neural voice model is bundled in the app so this works out of the box, offline, on both Mac and iPhone — and the voiceprints never leave your device. You can tune how strict the matching is, and merge or forget any voice.
Where exactly does the audio go?
Nowhere off your device. Audio is captured to a temporary file and processed by Whisper running locally. After the transcript finalizes, the temporary capture file is deleted and a playback-ready copy is kept on the device so you can replay alongside the transcript. Delete it any time. There is no upload, not to Synopsule, not to anyone.
Do I need an account?
No. Recording, transcription, playback, exports, and search all work without signing in. The only "account" involved is your Apple ID, for the App Store purchase, plus the optional Synopsule Pro subscription if you choose it.
Does it really work offline?
Yes — from the very first launch. A Whisper model ships inside the app, so you can record and transcribe with no download and no connection at all. On a plane, in a basement, or with the cable pulled, Synopsule works the same way it does at your desk. Download a larger model later if you want more accuracy.
Does the iPhone capture the other side of a call?
No. Capturing system audio is a Mac capability, done through Apple's Core Audio process taps. On iPhone, Synopsule records what the microphone hears, so for remote calls, run it on your Mac.
How is Synopsule different from cloud notetakers like Otter, Granola, or Fathom?
You still get the part people love — clean, re-readable notes with who said what — but everything runs on the device that recorded it. Cloud notetakers upload your audio to their servers, usually require an account, and often send a bot into your call. Synopsule transcribes locally with Whisper, labels every speaker on-device, keeps the full audio so you can replay any moment (most tools discard it), and saves notes as open Markdown any AI can read instead of locking them in an app. No bot, no account, works offline, and your audio is never uploaded. It's a one-time $1.99 universal app, not a monthly per-seat plan.
Can Claude, Codex, or ChatGPT read my transcripts directly?
Yes — on Mac. Synopsule ships with a built-in MCP (Model Context Protocol) server. Two clicks in Settings → Connect to AI Apps and Claude Desktop, Codex (app, CLI, IDE), Claude Code, or ChatGPT can list your recordings, search them, and pull a full transcript or summary on demand. The MCP server is the Synopsule app itself, launched with --mcp, so there's nothing extra to download or update. It's local-only and read-only — transcripts stay on the Mac, and audio is never exposed. On iPhone, the same Markdown exports show up in Files for sharing into the ChatGPT or Claude iOS apps.
Can I shape the summary to the kind of conversation?
Yes. Before you summarize, pick a template — general, one-on-one, standup, sales call, interview, lecture, clinical SOAP, legal, or user research — and Synopsule produces a structured, speaker-aware recap tuned to that format, with action items and follow-ups. Every template is free; the specialized ones (Clinical SOAP, Legal) read best with a cloud model. You can also keep time-anchored notes as you record or read: tap a note to seek straight to that moment, and your notes fuse into the summary as authoritative context.
Do AI summaries send my audio away?
Never the audio. AI is opt-in. Bring your own OpenAI, Anthropic, or Gemini key and transcript text goes from the app straight to that provider. On a Mac you can instead point Synopsule at a local model through Ollama, so the summary runs on-device and nothing leaves at all. Or subscribe to Synopsule Pro and summaries route through Synopsule to OpenAI. Either way, only transcript text ever leaves, never the audio. If you never summarize, nothing leaves at all.
Can I get AI summaries without anything leaving my device?
Yes — two on-device paths. On a Mac, install Ollama, pull a model, and point Synopsule at it in AI setup; summaries are then generated entirely on your Mac, with no key or subscription. And on Macs and iPhones with Apple Intelligence (macOS 26 / iOS 26 on eligible hardware), Synopsule can summarize using Apple's on-device Foundation Models — again, nothing leaves the device. Either way, no transcript text and no audio is uploaded. (Ollama is Mac-only; if your iPhone isn't eligible for Apple Intelligence, use a BYO key or Synopsule Pro.)
What do I need to run it?
A Mac on macOS 15 Sequoia or later, or an iPhone on iOS 17 or later, optimized for Apple silicon. Pick a smaller Whisper model for snappy transcription on any supported device; on Apple silicon the larger models still feel close to real time.
What formats can I export to?
Word (.docx), Markdown, plain text, interactive HTML, and SRT and VTT subtitles on both devices, plus PDF on the Mac. Synopsule can also send a transcript straight into Obsidian or Apple Notes in one tap, so it lands in the notes app you already use. Speaker labels, timestamps, and the AI summary (if you made one) travel with the file, and you pick what to include.
How much does it cost?
A $1.99 one-time purchase on the App Store, covering both Mac and iPhone. AI summaries are optional: bring your own API key for free, or subscribe to Synopsule Pro for $4.99/month or $39.99/year for one-tap summaries with no key setup.

Your next conversation, transcribed in a minute.

Get it on the App Store, grant the mic permission, pick a Whisper model, and press record. No sign-up. No upload. It works the same on your Mac and your iPhone.

Get it on the App Store$1.99