The LumenNote recorder resting on travertine in late-afternoon light

LumenNote · AI Voice Recorder

Every word,
in a new light.

A 4.3 mm AI voice recorder. Press once and stay in the conversation — the transcript, summary and mind map are waiting when you’re done.

Download for iOS Download for Android

You can’t truly listen and take notes at the same time. Now you don’t have to.

Close-up of the recorder’s two buttons and its small OLED screen

01 · Controls

One button.
Every word.

Press it once to start recording, once more to stop. The small OLED screen shows only what you need: time, recording status, Bluetooth and battery.

02 · Finish

Ridges that
hold the light.

A satin-black aluminum body, sculpted with diagonal ribs. Recognizable at a glance — and by touch.

The recorder’s diagonal ribs and polished edge in raking light

03 · Profile

Thin enough to live
on the back of your phone.

4.3 mm thin, 44 grams, with magnets built in. It snaps onto any MagSafe iPhone — other phones just need a magnetic ring.

An interview at a Paris café table, the recorder lying between two cups of espresso

How it works

You listen.
It takes notes.

Q4 Launch Sync ● Recording

Speaker 100:05Let’s lock the launch date first. The third week of October works best.

Speaker 200:21The demo video needs one last cut. I’ll walk everyone through it on Thursday.

Speaker 100:48Great. And the venue confirms by Monday?

Speaker 301:02It does. I’ll send the guest list on Wednesday.

AI summary

Launch set for the third week of October
The demo focuses on the recording-to-summary flow

Action items

Confirm the venue — Monday
Send the guest list — Wednesday
Final demo cut — Thursday

01Record
02Sync
03Transcribe
04Summarize

Moments

Wherever
people talk.

01
Meetings
Set it on the table, press once, and leave with the minutes.
02
Calls
Slide to call mode. A bone-conduction mic records the call through the back of your phone — every number, name and promise.
03
Ideas
Think out loud. Find it later as searchable text.

The app

An hour of talk.
One page that matters.

9:41

00:0042:18

Transcript

Speaker 1 00:00:05

Let’s lock the launch date first. The third week of October works best — the venue will confirm by Monday.

Speaker 2 00:00:21

The demo video needs one last cut. I can walk everyone through it on Thursday.

Speaker 1 00:00:48

Great. Let’s finalize the guest list by Wednesday.

Transcript

9:41

00:0042:18

Summary

Q4 Launch Sync

Sep 27, 2026 · 42m 18s

Overview

The team aligned on launch timing, the demo story and guest outreach for the Q4 release.

Key decisions

Launch in the third week of October
Demo focuses on recording-to-summary

Action items

Confirm the venue — Monday
Final demo cut — Thursday

AI summary

9:41

00:0042:18

Mind map

No recorder with you? Record straight from your phone in the LumenNote app — with the same transcripts, summaries and mind maps.

At a glance

Tech specs.

4.3mmThickness
44gWeight
22hRecording time
120+Languages & dialects

Dimensions: 56 × 90 × 4.3 mm
Weight: Approx. 44 g
Body: Aluminum alloy
Display: 0.42″ monochrome OLED
Microphones: 2 omnidirectional + 1 bone-conduction
Recording modes: Phone call · Meeting
Languages: 120+ languages and dialects
AI: Transcripts, summaries and mind maps, powered by leading large language models
Storage: 8 GB · 16 GB · 32 GB · 64 GB
Connectivity: Bluetooth model · Bluetooth + Wi-Fi model
Battery: 400 mAh (Bluetooth model) · 470 mAh (Wi-Fi model)
Recording time: Up to 22 h (Bluetooth model) · up to 8 h (Wi-Fi model)
Standby: Up to 90 days
Charging: USB-C
Mounting: Built-in magnets — snaps onto MagSafe iPhones; a magnetic ring for other phones
App: iOS · Android