Ciphera
Closed TestingZero-identity encrypted communicator with peer-to-peer voice and video calls.
- Android
- Closed testing
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Free, privacy-first Android apps built with zero compromise.
Explore the Mumline collection of privacy tools3
Mumline
Who we are
We build privacy tools that turn everyday mobile problems into secure, zero-knowledge solutions.
More about usPrivacy Android apps
100%
Offline & private by default across all applications.
- Privacy by design
- Zero tracking
- 100% offline tools
- No accounts required
- Closed testing
- Coming to Google Play
- Privacy by design
- Zero tracking
- 100% offline tools
- No accounts required
- Closed testing
- Coming to Google Play
Featured appsApps engineered
View all appsApps engineered
for real privacy
Zero accounts required
You should never need to identify yourself to use basic utilities. No sign-ups, no logins, no personal data.
Built for privacy
Every Mumline app starts with zero-knowledge architecture. No tracking, no accounts, and on-device processing.
Offline by design
Where possible, operations remain strictly on-device without any internet connectivity or external telemetry.
Why MumlineEngineered for
Learn moreEngineered for
device sovereignty
Zero data collected
No phone numbers, emails, or personal identifiers. Nothing leaves your phone without explicit intent.
Offline by default
Quiet Drop and Calculator Vault operate without internet access. Ciphera uses RAM-only volatile relays.
Hardware AES-256
Military-grade authenticated encryption anchored to device keystore. Keys remain strictly on-device.
One simple homeThree privacy tools,
Three privacy tools,
all in one place
Find every Mumline app with complete architectural specifications, permission explanations, and official privacy policies.
Explore the collectionCiphera
Zero-identity encrypted messenger with WebRTC peer calls.
Quiet Drop
100% offline local Wi-Fi file transfer with zero cloud.
Calculator Vault
Hardware AES-256 hidden vault behind a calculator disguise.
Free by purposeSimple access
Simple access
for everyone
Privacy tools
Free Android apps built around everyday privacy needs, with clear zero-knowledge guarantees.
Explore the apps- One clear purpose per app
- No account registration required
- No telemetry or advertising SDKs
- Powered by SparkNX
Freeto use
Uncompromising
On-device encryption and offline processing that put your security first.
Read the questions- Hardware AES-256 encryption
- RAM-only volatile relays
- Zero cloud dependencies
- Closed testing on Google Play
- Full local data sovereignty
- Verifiable permission lists
Zerotracking
Zero compromisePrivacy principles
Privacy principles
you can count on
No phone numbers, no emails, no registration. Start instantly without providing any personal data.
All transfers and vault storages happen strictly on your device or direct local Wi-Fi. No cloud relays.
Military-grade AES-256 encryption with X25519 key exchange. Keys remain strictly on your physical device.
Good questionsClear answers,
All questions