Your notes can contain deeply private parts of your life: a sudden idea, a journal entry, health information, a family memory, money-related thoughts, a recording, or a personal photograph.
Putting those thoughts on paper shouldn’t make you worry that a remote worker, advertising software, or a stranger might read them.
Memory Chat follows one straightforward rule: your memories belong only to you. Its encryption, private keys, and device controls work together to protect your notes, recordings, and files.
Security does not have to be confusing. Before we explain how Memory Chat protects your information, let’s define five basic terms in plain English:
Plain English Definition: Encryption turns a readable message or image into scrambled code. Only you and the intended recipient can make sense of it; anyone who intercepts it sees gibberish.
Plain English Definition: A digital encryption key is a unique secret string that lets a device turn information into scrambled data and then restore it to readable text, photos, or audio. Without the exact key, the data stays unreadable—like a locked door that only its physical key can open.
Plain English Definition: Each note or file has its own key, like a locked box with a separate key. Memory Chat secures those individual keys with your personal Master Key. This method, known as envelope encryption, separates the protection of the content from the protection of its key.
Plain English Definition: Locking your home means turning the key yourself before you leave instead of relying on someone nearby to do it later. On-device encryption works the same way: your phone scrambles notes and files before sending them over the internet.
Plain English Definition: Your notes are stored on the phone itself, so you can open, search, or edit them without an internet connection—even on a plane or deep underground. When you reconnect, encrypted changes sync across your other devices.
Instant Local Storage: Your note saves straight to a secure database on the phone’s hardware as soon as you type it—no server response or spinning wheel required.
Individual Note Keys: Each note receives its own 256-bit encryption key, so notes do not share a single content key.
Sealed Inside Your Master Vault: Your personal Master Key then seals that note-specific key.
The Cloud Only Sees Scrambled Code: When your devices sync, they send encrypted note content. The service can store and pass along those notes, but it does not have the keys required to read them.
Scrambled on Your Phone Before Upload: Memory Chat encrypts an image or voice recording on your phone before it leaves the device, applying a dedicated key directly to the file’s bytes.
Storage Servers Cannot Read Your Photos: Photos are encrypted before they reach our secure cloud storage. An unauthorized download appears as meaningless digital noise and cannot be opened or played without your private key.
Decrypted Only on Your Trusted Devices: Open the note on an iPad, computer, or another device, and the encrypted file streams directly there. That device decrypts it in private memory using its own key.
Device hardware security: Memory Chat stores private keys in the operating system’s protected storage—Apple Keychain on Apple devices and Android Keystore on Android. Access to that data is restricted, though the specific safeguards vary by device and operating system.
Private Cloud Backup (Google Drive & iCloud): Google accounts store the key in the private appDataFolder within Google Drive, while Apple accounts can sync it through iCloud Keychain. Memory Chat’s servers never store the unencrypted Master Key.
Emergency Offline Recovery QR Code: Save or print the recovery code, then store it in a private place. If you lose access, it can restore the encryption keys needed to retrieve your encrypted data. Protect the code as carefully as you would a password.
Unlock with Face ID or Fingerprint: Super Memory supports your device’s biometric login, so Face ID or a fingerprint can protect the app. That keeps casual users out of your notes.
Protect selected boxes or everything: Lock only the memory boxes containing sensitive information, or secure the entire app.
Privacy shield: When you leave the app, Memory Chat automatically blurs its preview so people nearby cannot read the screen.
Some free apps earn money from advertising. Before storing private information in any app, it is worth checking how the service uses your data and what its business model is.
Basic Memory costs nothing and includes unlimited notes, two devices, and 100MB of cloud storage. Super Memory is $3.99 per month, while Ultra Memory costs $9.99; both offer higher limits and extra features. Memory Chat does not place ads in your notes or sell their content to advertisers. Prices may differ depending on your region and app store.
1-Tap Complete Export: Save your notes, checklists, recordings, and pictures in a .memchat backup package that you can import into Memory Chat later.
Optional Password Protection: Protect your exported backup with a password. PBKDF2 uses 210,000 iterations to derive an encryption key from that password; the archive is then encrypted. Keep the password somewhere safe so you can open the backup again.
Full control: Keep your backup yourself, then import it into Memory Chat on a compatible device whenever you need to restore your content.
Your thoughts, family memories, and plans should stay private. Memory Chat encrypts synchronization and lets you control which devices can access your information, keeping everything together without allowing the service to read your notes.
