How to Lock Voice Recordings With Face ID, Touch ID or a Passcode

Typing "lock voice recordings" into your phone usually means one thing: you have audio you don't want anyone else opening if they pick up your phone. The frustrating part is that Apple's Voice Memos and Android's stock recorder were never built with that in mind. Here's what actually works to lock voice recordings on iPhone and Android — including the built-in options, their real limits, and the simplest fix.

The short version

Neither Voice Memos on iPhone nor the default recorder on Android lets you lock an individual recording with Face ID, Touch ID or a passcode. What you can do is lock the whole app (iOS 18+), move recordings into a secured space (Samsung Secure Folder, a locked Note), or use a third-party vault app. All of these are workarounds bolted onto apps that weren't designed for private audio. The cleaner fix is a recorder with a built-in library lock — BlackBox locks your entire recording library behind Face ID, Touch ID, or a passcode, on-device, with no extra app to install.

Why Voice Memos doesn't have a lock

Apple's Voice Memos has never included a password, PIN, or biometric lock for recordings, on any iOS version. There's no setting inside the app for it — it simply wasn't built as a privacy-first recorder. If you search Apple's own community forums, this is a recurring question with the same answer: it isn't supported natively. That gap is exactly why people end up hunting for workarounds, and why some third-party recorders exist specifically to fill it.

Option 1: iOS 18's "Require Face ID" app lock

iOS 18 added a real, Apple-built way to lock apps — including Voice Memos — behind Face ID, Touch ID, or your passcode. It's an app-level lock, not a per-recording lock, but for most people it solves the immediate problem: someone picking up your unlocked phone can't open Voice Memos at all.

How to lock Voice Memos on iPhone (iOS 18+):

1. Find the Voice Memos icon on your Home Screen or in App Library.
2. Touch and hold the icon until the quick actions menu appears.
3. Tap Require Face ID (it will say Touch ID or Passcode instead, depending on your device).
4. Confirm by authenticating with Face ID, Touch ID, or your passcode.

From then on, opening Voice Memos requires authentication. You can go a step further and choose Hide and Require Face ID, which also removes the app from your Home Screen and tucks it into a Hidden folder in App Library — useful if you don't want the app itself to be visible.

What this does and doesn't cover:

• It locks the app, not individual recordings inside it. Once you're in, every recording is accessible.
• Content inside a locked app is also kept out of Spotlight search, Siri suggestions, and notification previews, according to Apple's own guidance.
• It does nothing retroactively for recordings you've already shared, AirDropped, or exported to Messages, Files, or another app. Once a copy leaves Voice Memos, this lock has no effect on it.
• A handful of Apple's own built-in apps can't be locked or hidden this way, but Voice Memos, being a regular app, can be.

This is the best free option Apple provides today, and it's worth turning on even if you plan to use something else for genuinely sensitive audio.

Older workaround: Screen Time app limits

Before iOS 18, people used Screen Time > App Limits or Content & Privacy Restrictions as an indirect lock — setting a time limit on Voice Memos so it required a Screen Time passcode to open past the limit, or restricting it under allowed apps. It technically worked, but it was clunky, easy to misconfigure, and not what Screen Time was designed for. If you're on iOS 18 or later, the "Require Face ID" option above is strictly better and takes fewer steps.

The locked-note trick

Another long-standing workaround: record in Voice Memos, then either save the audio as an attachment inside a Note, or describe/transcribe it into a Note, and lock that specific Note with Face ID/Touch ID/passcode via the Notes app's own lock feature. This can work for a single important recording, but it's manual, easy to forget, and doesn't scale if you record often. It also means your original recording still sits unprotected in Voice Memos unless you delete it there after moving a copy.

Option 2: Locking recordings on Android

Stock Android (the Recorder app on Pixel, or whatever recorder came with your phone) has the same gap as Voice Memos — no built-in password or biometric lock on individual audio files. The options differ by manufacturer.

Samsung: Secure Folder

Samsung's Secure Folder is the closest thing to a real answer on Android. It's a separate, encrypted space on the phone — its own home screen area, protected independently with a PIN, pattern, password, or biometric lock — where you can keep apps and files completely walled off from the rest of the phone.

How to move recordings into Secure Folder:

1. Set up Secure Folder from Settings > Security and privacy > Secure Folder if you haven't already, and choose its lock type.
2. Open Secure Folder and either install a recorder app inside it directly, or add your existing recording files.
3. To move files in, use My Files, select the recordings, and choose Move to Secure Folder (or copy them in via the Secure Folder's own file manager, depending on your One UI version).
4. From then on, those files only open after you authenticate into Secure Folder.

This genuinely locks the files, not just an app shortcut, which makes it stronger than an app-level lock. The tradeoff is it's Samsung-specific and involves manually moving files rather than recording directly into a protected space by default.

Other Android phones: app pinning (not a real lock)

Non-Samsung Android phones have screen pinning (Settings > Security > "Advanced" or similar > App pinning). Pinning keeps one app on screen and blocks swiping away to the home screen or other apps — it's meant for handing your unlocked phone to someone else temporarily, like a kid or a demo. It is not a privacy lock: it doesn't require a passcode to unpin by default, and it does nothing to protect the underlying files if someone has other access to your phone. Don't rely on it for anything you actually want kept private.

Vault and locker apps

Generic "vault" or "gallery locker" apps exist for Android and can hide and password-protect audio files by importing them into an encrypted container. They work, but they add a second app to manage, usually require moving files after the fact rather than recording directly into the vault, and their security depends entirely on that third-party developer — something worth checking before trusting sensitive audio to an unfamiliar app.

Why the built-in app lock isn't quite enough

Both iOS 18's app lock and Android's screen pinning share the same structural weakness: they lock the door to the app, not the recordings themselves. Once you're past the lock, every file is wide open. If you regularly record something sensitive — a therapy session, a medical appointment, a workplace conversation you might need as evidence — you want the recording itself born into a protected library, not protected by a lock you have to remember to set up and that a shared copy bypasses entirely.

That's the gap a recorder with a native library lock closes.

The cleaner option: a recorder with Face ID/passcode built in

BlackBox is a 24/7 background voice recorder for iPhone and Android that locks its entire recording library behind Face ID, Touch ID, or a device passcode — no separate vault app, no moving files between folders, no Screen Time workaround.

What that looks like in practice:

• One lock, the whole library. Turn on the app lock once and every recording — past and future — sits behind biometric or passcode authentication.
• On-device by default. Recordings are stored locally, with no account required and nothing uploaded automatically.
• Records continuously in the background, capturing hourly files organized into daily folders, so you're not manually starting and stopping a recorder.
• Auto-archive and auto-delete, with the option to auto-export finished days to a folder you choose before they're removed — so you control retention without babysitting storage.
• On-device transcription with speaker labels, so you get searchable text alongside the audio, generated locally rather than sent to a server.
• Free, for both iPhone and Android.

Because the lock lives inside the recorder itself, there's nothing extra to configure and nothing that only protects the app icon while leaving files exposed elsewhere on the phone.

Step-by-step: locking your library in BlackBox

1. Open BlackBox and go to Settings.
2. Turn on App Lock (Face ID / Touch ID / biometric, or a passcode as fallback).
3. Confirm with your biometric or passcode.
4. From then on, opening the app — and everything inside it, recordings, transcripts, archives — requires that authentication.

There's no separate step for "locking" a specific recording, because the library itself is the protected space.

A quick comparison

One more thing: locking doesn't make recording legal

A lock protects who can open your recordings — it says nothing about whether you were allowed to make them in the first place. Consent laws for recording conversations vary by state and country, and get it wrong and a lock on your phone won't help you. Before you record someone else, read is it legal to record audio for how consent rules generally work.

The bottom line

Apple's Voice Memos and Android's stock recorder were never built to keep audio private from someone holding your unlocked phone. iOS 18's app lock and Samsung's Secure Folder are real, useful tools — turn them on if that's what you have. But they lock the app or require you to manually move files, not the recording itself, at the moment it's made. A recorder that locks its whole library behind Face ID, Touch ID, or a passcode by default — without a separate vault, without manual steps — is the simpler answer. That's what BlackBox does, for free, on both iPhone and Android.