Product1 publisher2 min readPublished
Comu charges $180 for a microphone you can leave running on the boardroom table
A standalone AI recorder has to beat the free app on the phone it sticks to. 9to5Google's review of Comu's Action Pro shows that what the extra hardware buys you is where you are able to put it.
The Product Desk · Product desk
What happened
- Comu's Action Pro is a 7mm standalone note-taking gadget selling for $180 that sticks magnetically to the back of an iPhone or Pixel, with circular magnetic stickers in the box for phones lacking MagSafe.
- Set on a table beside a Pixel 11 Pro during a deliberately quiet conversation, the six-microphone recorder pulled in voices from neighbouring tables while the phone isolated the two speakers.
- The device transcribed that conversation with minimal errors, though 9to5Google found it made more errors than competing services, working through AI vendors that include OpenAI and Google.
- Its larger body carries a battery good for 70 hours of recording, which the review puts at double the figure for the thinner Plaud Note Pro.
Compiled by The Product DeskSomething wrong?How this is made
Why it matters
- capability Six far-field microphones cover a table a phone is not tuned to hear, so a room of eight can be captured without anyone reaching for a handset to start an app.
- constraint Because the recording itself is thin and tinny, there is no listenable fallback when the transcript gets a name or a number wrong, and the transcript is the half of the comparison Comu loses.
- exposure Covert placement on a boardroom table is named in the review as a use case. That puts the consent question on whoever hands these out, since nobody at the table sees a recording app open on a phone.
- cost The $180 is the only number a buyer can check, since the AI premium flagged in the review's own headline arrives without a figure attached, and run rate is what a finance approver will ask about.
An omnidirectional array has no way of being told which table matters. That is the trade Comu made to get pickup range out of a 7mm slab, and the review records the result in one line: "it picked up voices from the tables next to me, leading to audio that was basically unusable to listen to," the 9to5Google reviewer wrote [8].
The hardware half of the pitch holds up better. Seventy hours of recording is double the Plaud Note Pro's, which puts the Plaud at about 35 [5][1]. The Action Pro is 7mm thick where the Plaud Note is 3mm [2][3], so it is 4mm more in the pocket [2], and the extra room fits a USB-C port instead of a proprietary magnetic cable that goes missing [4].
People open a recorder app when the meeting starts, by which point the phone is already face-up on the table and pointed at whoever is talking. The Pixel's built-in Recorder has covered that case for years, free, with real-time transcription and translation [13]. The standalone device is sold against the recordings nobody starts, and the reviewer's answer to why you would carry one is "it's the passivity of it all", leaving it running through the day or setting it on a boardroom table [12].
The premium sits on the software. Granola's job, as the review describes it, is synthesising a recording into a summary with identifiable action items [16]; Comu goes a step past that, hooking into foundation models such as Claude Opus 5 or GPT-5.6 Terra to spin a summary into a document or a presentation from predefined templates [15]. On that part, 9to5Google's own headline says the Action Pro "struggles to justify its AI premium" [14]. The transcript is the only output that matters once playback is unusable, and the review found it accurate with more errors than the competition made [10].
This purchase comes down to two things, and Comu needs both to go its way. The microphone has to sit somewhere your phone will not, across a table or in a pocket for a full day, and text has to be the only thing you need out of it, with no expectation that anyone will ever play the audio back. Meet both conditions and the $180 is doing work no free app is attempting [1]. Fall short on either and you are buying a second charger for a job the phone already has [13].
What to watch
- Whether Comu publishes a recurring price for the AI features, and what the $180 hardware covers without it.
- Whether transcription accuracy closes the gap with competing services, since the transcript is the only usable output.
- Whether the generated documents and presentations move beyond the predefined templates the review describes.