DoubleRubber is a secure keyboard app that encrypts text before it leaves your device, allowing private communication in any app. It features key sharing, burn-after-reading, and requires no accounts or servers.
DoubleRubber is an Other productivity product. It enables users to encrypt messages before sending, ensuring privacy across any app. DoubleRubber is a consumer product aimed at privacy-conscious mobile users. Pricing is paid, from $99. The product ships for iOS.
hans jerry U P builds and maintains DoubleRubber, and the product first shipped in 2026. Across PulseGate's embedding index, DoubleRubber has few near neighbours, marking it as relatively distinct. Among its 5 catalogued features are encrypted keyboard, on-device encryption, and key sharing via QR.
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