Where Does AI Voice Recorder Store Data? Local, Cloud and What You Can Delete

To delete audio, jump to how to delete a recording. To lock the app, skip to App Lock and the contact profile lock.

Where does AI voice recorder store data: on the device, in the app or in the cloud?

A Comu recording can live in three places: the device, the Comu app on your phone, and the cloud. Text results such as transcripts and summaries live in the cloud.

How much audio fits on the 16 GB device?

Both devices hold 16 GB. Comu Action Pro stores about 1,000 hours of recording at 16 kbps, and Comu Note Pro stores about 500 hours at 32 kbps.

Device management in the Comu app shows the storage on your device, so you can check it any time.

What happens to a recording when the device and the app are not connected?

The device keeps saving recordings on its own storage, and syncing continues when the connection returns. A network interruption affects cloud sync and live AI features, and it does not delete recordings already saved on the device.

Recording itself does not need the app:

1. On Comu Action Pro, press and hold the record button for 2 seconds. The device vibrates once and the screen shows a recording animation and a timer.
2. Press the button once to pause or resume.
3. Press and hold for 2 seconds to finish. The device vibrates twice and the screen shows "Saved".

On Comu Note Pro, press and hold the record button to start, press once to pause or resume, and press and hold again to save. The device confirms each state with vibration and the screen.

How does audio move from the device to the Comu app?

Once Bluetooth is connected, Comu Note Pro transfers recordings to the app in the background, and you can switch to Wi-Fi to speed it up. Long recordings move faster over Wi-Fi. Comu Action Pro pairs with the app over Bluetooth during setup and has Wi-Fi 6 as well.

Wi-Fi transfer is called Fast Transfer in the app. The device creates its own local Wi-Fi hotspot and the app joins it, so your recordings do not travel over a public Wi-Fi network. Because the hotspot is local, connecting to it does not mean your phone is online.

1. Turn on Wi-Fi on your phone and turn off any VPN.
2. Start Fast Transfer in the Comu app. If the device is already connected, you go straight to joining the hotspot without pairing again.
3. Allow the system prompt on your phone when it asks to join the device's hotspot. Only you can approve it, and Comu cannot approve it for you.
4. Keep the screen on until the transfer finishes.

If recordings have not synced yet, tap Retry in the app or use Fast Transfer.

How does AI voice recorder cloud backup work on Comu?

Cloud Backup copies the original audio files of your recordings to the cloud, so you can keep working on your phone, on the web and on the desktop app. It is a switch you control, and the entry sits in the Me tab.

1. Open the Comu app and go to Me.
2. Tap Cloud Backup. The entry shows whether the switch is On or Off.
3. Turn Cloud Backup on or off.
4. To keep uploads off mobile data, turn on the Wi-Fi-only upload switch in the Cloud Backup settings. Audio then uploads when your phone is on Wi-Fi.

Cloud Backup covers audio only. Text results from your audio are stored in the cloud regardless of the switch.

What does Cloud Backup change when you turn it on?

When you switch Cloud Backup from off to on, the app scans every recording stored on your phone and queues them for upload. With Cloud Backup on, the cloud holds the master copy of your files and syncing across devices works. Each Comu client controls the upload of the recordings on that client.

What changes when you turn Cloud Backup off?

Turning Cloud Backup off stops new audio from uploading. It does not remove audio that is already in the cloud. Some features that need the cloud copy of the audio change:

• Get Summary. When a recording's audio has not reached the cloud, Get Summary stops and shows a prompt. Other AI generation on that recording shows a prompt that the audio has not been uploaded.
• AI Note Automation (Premium or Elite). Automatic transcription and summaries after sync need Cloud Backup on. Starter generates transcripts and summaries when you tap to generate them.
• Uninstalling the app. With Cloud Backup off, the app's copy of audio that was never backed up is removed for good when you uninstall the app, because the local copy is temporary.

Premium and Elite are paid plans bought only inside the Comu app, through the App Store or Google Play. The website does not sell them.

How do you delete a recording from the device, the app and the cloud?

You delete in the place that holds the data. The app removes one recording, the cloud option removes the cloud audio, device management clears the device, and deleting the account removes everything.

How do you delete one recording in the app?

Deleting a recording in Comu takes two steps: Trash first, then a permanent delete.

1. Open Files.
2. Open the menu for the recording.
3. Tap Delete and confirm that you want to move the file to Trash. The prompt tells you the file can be restored at any time.
4. Open Trash from the top of Files.
5. Select the recording. Choose to restore it, or choose to delete it permanently. A permanent delete cannot be undone.

Deleting a recording in the app removes the text that belongs to it, including its transcript. A permanent delete from Trash syncs to the cloud, and the file also leaves the Trash of your other signed-in devices. Deleting a tag removes only the tag, and the files stay in All.

Delete cloud recordings AI note taker steps in the Comu app

Comu removes all the audio it holds in the cloud with one button, so you do not delete files one by one.

1. Open Me and tap Cloud Backup.
2. Tap the option that deletes recordings from the cloud.
3. Read the warning. Some recordings in the cloud may not be saved on your phone, so download the ones you want to keep first.
4. Confirm. The action asks for a second confirmation before it runs.

This action clears cloud audio only. Audio already cached on your phone is not affected, and transcripts and summaries stay as they are. Because the cloud is the shared copy, clearing it affects syncing across your devices. Turning Cloud Backup off does not do this job for you, since the switch only stops new uploads. To remove audio that is already in the cloud, use this button, delete the recording from Trash, or delete the account.

How do you delete the data on the device itself?

Open device management in the Comu app and choose the option that unbinds the device from your account and clears the data on it. Factory reset is also part of device management.

A device that is bound to another account has to be unbound from that account first. Sign in with the original account and unbind it, or write to support@comu.com.

How do you delete your account and data?

Deleting your account removes the account and all of its data. The option sits in the account management area of the Me tab, together with your profile picture, user name and sign-in method.

1. Open Me and go to the account management area.
2. Choose the option to delete your account.
3. Review what deleting will remove.
4. Complete the identity verification the app asks for.

Deleting the account does not cancel a subscription. Premium and Elite are billed by the App Store or Google Play, so cancel them in the store.

You can also delete your data piece by piece. Comu lets you delete a single audio file, a contact, or the whole account at any time. To get a copy of your personal data, contact Comu at support@comu.com.

What else can you delete?

Deleting a chat message does not remove a source recording from Files. It also does not reverse an email, calendar event or task that Comu already sent to a connected tool.

How do you lock voice recordings with App Lock and a contact profile lock?

Two switches in the security settings of the Me tab put a verification step in front of your recordings and your contacts. App Lock covers the whole app, and the contact profile lock covers the most sensitive part of a contact, the profile.

1. Open Me and go to the security settings.
2. Turn on App Lock to require verification to open the app.
3. Turn on the contact profile lock to require verification before a contact profile is shown.
4. Verify when the phone asks. Turning a lock off needs a confirmation and a verification too.

With the contact profile lock on, a contact's profile is locked and its content stays hidden until you verify.

Does App Lock use Face ID?

On iPhone, App Lock uses Face ID if you have allowed Face ID, and the phone passcode if you have not. On Android, it calls the verification built into the phone's system.

Both locks rely on your phone's own screen lock. If your phone has no screen lock set, the app tells you that no phone lock is set up and the switch cannot be turned on. A swipe-to-unlock screen does not count as a lock. If you later remove the screen lock in your phone settings, the Comu lock stops working and returns to Off.

Who can see your recordings and data?

Comu encrypts files throughout. Comu does not sell data to third parties or use it to train AI, and you can delete your data at any time.

What do Comu Note Pro and Comu Action Pro cost?

Comu Note Pro costs €139.99 and Comu Action Pro costs €179.99 (checked Nov 6, 2026). The free Starter plan comes with the device, and both devices use the same Comu app and the same backup, delete and lock settings.

Common questions about where an AI voice recorder stores data

Where does Comu store my recordings?

Comu stores a recording on the device's 16 GB of storage first, then moves it to the Comu app on your phone. With Cloud Backup on, the audio is also backed up to the cloud. Transcripts, summaries, insights, contact information and to-dos are stored in the cloud.

How many hours of audio can the device hold?

Comu Action Pro holds about 1,000 hours at 16 kbps, and Comu Note Pro holds about 500 hours at 32 kbps. Both have 16 GB of storage.

Can I turn off Cloud Backup?

Yes. Open Me, tap Cloud Backup and switch it off. New audio stops uploading, and audio already in the cloud stays until you delete it. Get Summary and other AI generation show a prompt for recordings whose audio has not reached the cloud.

What does the Wi-Fi-only upload switch do?

The Wi-Fi-only upload switch keeps audio uploads on Wi-Fi so they do not use your mobile data. You find it in the Cloud Backup settings in Me.

How do I delete a recording from Comu for good?

Open the recording's menu in Files, tap Delete and confirm the move to Trash. Then open Trash and choose to delete it permanently. The permanent delete cannot be undone, and it syncs to the cloud and to your other signed-in devices.

How do I delete my Comu account and data?

Open Me, go to the account management area and choose the option to delete your account. Review what deletion removes and complete the identity verification. Deleting the account removes all of its data, and you cancel any subscription separately in the App Store or Google Play.

Does Comu sell my data or use it to train AI?

Comu does not sell data to third parties or use it to train AI. Files are encrypted throughout, and you can delete your data at any time.

Can I lock the Comu app with Face ID?

Yes. Turn on App Lock in the security settings under Me. On iPhone it uses Face ID when you have allowed it, and the phone passcode otherwise. On Android it uses the phone's system verification.

Does turning off Cloud Backup delete my cloud recordings?

No. Turning Cloud Backup off only stops new uploads. To remove audio already in the cloud, use the option under Cloud Backup that deletes recordings from the cloud, or delete the recording from Trash.

Related reading

• Comu AI Transcription, Summaries & Feature Guide

Sources

Pages were checked on Nov 9, 2026.

1. Comu, Comu Action Pro and Comu Note Pro