Murmur Input: Encrypt Messages
Encryption Keyboard & Privacy
Free · In‑App Purchases
Private words. Familiar chats. Encrypt messages into emojis and read copied replies in your keyboard. On-device encryption. No registration required.
Murmur Input adds on-device text encryption to your everyday typing. Write in the keyboard, turn your message into encrypted emojis, and send it through your chosen messaging app. Copy a supported encrypted message and tap Read/Paste to read it inside Murmur's keyboard.
Connect with other Murmur users through a shared-key QR invitation or private ECDH pairing. Both participants need Murmur and the matching key or completed pairing. Murmur prepares messages; you choose when to send them in your chat app.
Type in 11 languages: English, Chinese (Simplified and Traditional), Spanish, Russian, Arabic, French, German, Portuguese, Italian, Turkish, and Korean. All 12 keyboard language options are free. Use offline dictionaries, optional local word learning, keyboard size controls, and light or dark appearance.
Free includes 3 QR key slots and 1 ECDH key slot. The ECDH slot holds a one-to-one pair or a received group invitation. Premium is an optional lifetime purchase for more key storage and creating private groups of 3–10 people. Storage capacity depends on key size and secure-storage limits. There is no subscription. Optional developer-support purchases are separate and do not unlock Premium.
Encryption, decryption, and dictionary lookup run on your device. No Murmur account, advertising, or cross-app tracking. Enable Murmur in iOS keyboard settings. Allow Full Access is needed for shared secure key storage and supported clipboard features; the keyboard does not upload typing, messages, or keys. Some apps and secure text fields do not allow custom keyboards.
Choose invitation and message expiry. Expiry limits future reading in Murmur; it does not erase copies held by other apps or people. Ordinary typing is visible to the app receiving it, and recipients can copy readable text. Pair only with people you trust.
Support: jwyang999@gmail.com
Privacy: https://sites.google.com/view/murmurinputprivacypolicy
Auto-read clipboard is On by default when no choice is saved. While Murmur’s keyboard is open, it can decrypt supported copied messages and save invitations. Turn it Off in keyboard settings if you prefer manual reading; Read/Paste always remains available. Full Access and iOS paste permission are required. It never sends a message automatically.
• Added translations for the Rate button, keyboard controls and menus.
• Made language selection easier when setting up your keyboard.
• Improved Enter and Delete when the encryption compose area is empty.
• Improved button text sizing and wrapping.
The developer, Junwei Yang, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- User Content
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Junwei Yang
- Size
- 54.3 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later.
- iPhone
- Languages
English and 11 more
- English, Arabic, French, German, Italian, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Support Murmur Input $99.99
- Support Murmur Input $9.99
- Support Murmur Input $49.99
- Support Murmur Input $19.99
- Support Murmur Input $4.99
- Murmur Premium $24.99
- Copyright
- © 2026 Junwei Yang
