Last updated: February 18, 2026

Privacy Policy — Neumonic (English)

Overview

Neumonic is an offline-only iOS application designed to help users memorize their BIP-39 mnemonic seed phrases using spaced repetition. We take your privacy and security extremely seriously.

Data Collection

We do not collect any data. Neumonic:

• Does NOT connect to the internet
• Does NOT use analytics or tracking SDKs
• Does NOT collect personal information
• Does NOT share data with third parties
• Does NOT contain advertisements

Data Storage

All data is stored locally on your device only:

• Mnemonic words: Stored in the iOS Keychain with kSecAttrAccessibleWhenUnlockedThisDeviceOnly protection. This data never leaves your device and is protected by your device's hardware security.
• Learning progress: Stored locally using SwiftData (on-device database).
• App settings: Stored in UserDefaults (on-device).

Biometric Authentication

Neumonic uses Face ID / Touch ID to protect access to your mnemonic data. Biometric data is handled entirely by Apple's LocalAuthentication framework and is never accessed or stored by the app.

Notifications