---
title: "Lock Notes with Face ID and Fingerprint: Keep Private Thoughts Safe"
description: "Keep private diaries, personal reflections, and family secrets away from prying eyes. Lock your notes with Face ID, Touch ID, or a fingerprint."
locale: "en"
canonical: "https://memorychat.app/en/blog/biometric-app-lock-face-id-fingerprint/"
publishedDate: "2026-08-13T10:00:00.000Z"
updatedDate: "2026-10-03T21:41:12.000Z"
author: "Memory Chat Team"
tags: ["lock notes app","notes app with face id","fingerprint lock notes","secret diary with password","lock private notes"]
readingMinutes: 2
---

# Lock Notes with Face ID and Fingerprint: Keep Private Thoughts Safe

> Keep private diaries, personal reflections, and family secrets away from prying eyes. Lock your notes with Face ID, Touch ID, or a fingerprint.

- **Published**: 2026-08-13
- **Author**: Memory Chat Team
- **Canonical Article**: https://memorychat.app/en/blog/biometric-app-lock-face-id-fingerprint/
- **Website**: https://memorychat.app

---

## Keep Your Private Life Truly Private

We pass our phones around to share holiday photos and sometimes hand them to children for a game. Then the worry hits: what if they open your notes and read something private?

Memory Chat supports biometric app locking with Face ID, Touch ID, or fingerprint authentication on compatible devices. It adds a useful barrier when you want to keep someone borrowing your phone from opening your private notes.

## Simple Security for Everyday Life

- **Instant unlock with your face or finger:** Use the biometric authentication supported by your device to open the app conveniently.
- **Automatic privacy shield:** Switch apps without exposing your notes: the screen blurs automatically, keeping nearby onlookers from reading them.
- **Lock specific Memory Boxes or the whole app:** Choose whether to protect the app or selected sensitive Memory Boxes.
- **Stays safe on your device:** Your operating system handles biometric verification. Memory Chat uses the authentication result to unlock access rather than receiving your fingerprint or face scan.

## What to Keep in Your Protected Notes

- **Personal daily diary:** Keep private thoughts, worries, and hopes in a protected Memory Box, with app locking as an additional barrier to casual access.
- **Surprise gift and celebration ideas:** Secretly plan birthday presents, anniversary surprises, or family trips.
- **Private health reflections:** Safely keep track of wellness goals, notes from doctors, and personal health observations.

## How to Turn on Biometric App Lock

Biometric app locking is available with Super Memory. Open Settings, find Security & Privacy, and enable the authentication option supported by your device. Follow the prompts to finish setting it up.