SilentSuite

io.silentsuite.android

End-to-end encrypted sync for calendar, contacts, and tasks

Your calendar, contacts, and tasks should stay in sync wherever you work: Android, macOS, Windows, Linux, and the web. SilentSuite keeps that data available across your devices while applying end-to-end encryption before anything leaves your device. Encryption and decryption happen on your device, and your keys stay there. The server stores only ciphertext, so it cannot read what you keep on it. This is what zero-knowledge means in practice: the privacy guarantee is a technical constraint, not a policy statement. SilentSuite is built to fit into each system you use. On Android it works as a native sync adapter for compatible calendar, contacts, and task apps. On macOS, Windows, and Linux it integrates through a lightweight desktop bridge, so your encrypted data can appear in the tools already built into your workflow. The web app gives you browser access when you are away from your own devices. iPhone support is coming soon. The app is fully open source. Anyone can read the code, review the encryption, and confirm the privacy claims for themselves. There are no proprietary components to take on trust. You choose where your data lives. Use the hosted service, or run your own server on hardware you control. Your data stays portable: export it at any time in standard formats, with no lock-in. This is a beta release. Calendar, contacts, and task sync are the focus of this version and form its stable core. Feedback and bug reports are welcome through the link in the app. Requires a SilentSuite account. Self-hosting documentation is available at docs.silentsuite.io.

First release: Jun 3, 2026, 13 total releases.

Most recent release: Oct 30, 2026.

Website Repo

Appears in 2 app stacks.

6,300 sats / 2 zaps received in the past year.

Sats Received

Underlying data available via MCP: app_zaps, app_releases.

Zap Count

Underlying data available via MCP: app_zaps, app_releases.

Releases

Oct 30, 2026 0.5.17-beta

Fixed the app asking you to add an account again after the active account was removed outside the app. It now recovers the sole eligible remaining account.
Oct 23, 2026 0.5.15-beta

- Restore contacts that showed in SilentSuite but were missing from your phone's Contacts app, including after an address book was recreated. Local group changes and deletions are kept. - Explain when a compatible task app needs to be installed for Tasks to sync. - Make Notes storage safer, so an unfinished write cannot replace a saved note.
Oct 20, 2026 0.5.14-beta

- Find deleted contacts under Settings → Recover deleted contacts, organised by account and address book. - Confirm before restoring a contact, with read-only address books protected from changes. - Keep the selected contact when rotating the screen, and avoid a contact-loading crash.
Oct 13, 2026 0.5.13-beta

Maintenance release.
Oct 6, 2026 0.5.12-beta

More reliable sync: collection discovery no longer holds up other account data, your edits are kept, and an incomplete listing is retried instead of being reported as complete. Stalled collection or item paging now ends as a temporary error instead of looping, and the next refresh can recover.
Oct 4, 2026 0.5.10-beta

Recover a legacy account-setup storage format that could prevent startup after updating, without clearing app data. Fix a crash during account sign-out cleanup. Replace the broken “Forgot password?” link with in-app help explaining password recovery limitations.
Sep 1, 2026 0.5.4-beta

Keeps SilentSuite release downloads and version information aligned across platforms.
Aug 25, 2026 0.5.3-beta beta

Fixes Android sign-in and setup screens hidden behind system bars or the keyboard.
Aug 24, 2026 0.5.2-beta

Improved Android compatibility on 16 KB-page devices, simplified annual subscriptions, clarified remote Bridge setup, and updated troubleshooting guidance.
Aug 6, 2026 0.5.0-beta beta

![SilentSuite v0.5.0-beta](https://github.com/silent-suite/silentsuite/releases/download/v0.5.0-beta/v0.5.0-beta-hero.png) SilentSuite v0.5.0-beta is a major update for our zero-knowledge encrypted calendar, contacts, and tasks suite. Your data stays end-to-end encrypted: the server never sees plaintext, and your keys never leave your device. This release hardens the Bridge, tightens billing, redesigns the Android app, and adds updated documentation. ## A more reliable DAV Bridge - Converged encrypted CardDAV and CalDAV href identity so shared collections stay consistent across sync, restart, and recovery. - Closed sync lifecycle races so interrupted syncs, wedged recovery, and concurrent DAV mutations preserve local writes without duplicates or lost work. - Made tombstone deletions, sync generations, and cache state terminal and consistent across DAV upgrades. - Sealed logout credential generation and made logout win over late native success.

More…

- Enforced collection-scoped DAV href ownership and rejected special hrefs and partial startup success. - Unix installer downloads now fail closed when checksum verification is unavailable or mismatched. ## Better macOS Contacts support - Added support for the macOS CardDAV account principal alias requested by Apple Internet Accounts. - Preserved canonical DAV hrefs, authorization, and storage behavior. - Pinned the internal Radicale contract to 3.2.3. ## Billing link proofs - Replaced reusable session handoff to hosted Billing with short-lived, single-use link proofs. - Billed link-proof metadata is now cleaned up within minutes instead of being retained indefinitely. ## A refreshed Android app - Established a Material 3 design foundation and aligned light and dark colors with the web palette, preserving accessible contrast. - Added a dedicated first-run account-choice screen with resumable, crash-safe post-login setup. - Added an account drawer with switching and sign-out, an account-aware settings hub, and a redesigned sync overview. - Targeted Android 16 / API 36 while keeping the API 21 floor. ## More reliable sync and signup - Made Android sync lifecycle status exact and hardened account state against stale generation lookups and sign-out races. - Hardened paid signup recovery to preserve the correct account across recovery and token validation. - Confined signup analytics to the canonical hosted production origin; preview and self-hosted builds are disabled. ## Updated documentation - Added a Linux Bridge install and uninstall guide. - Clarified that native iOS sync is roadmap-only and scoped Bridge support to verified desktop clients. - Added an Apps and Integrations homepage card and official app logos and links. - Refined the Android distribution layout and kept the Settings QR square. ## Install and update ### Hosted web app Open [app.silentsuite.io](https://app.silentsuite.io). ### Android ```bash curl -LO https://github.com/silent-suite/silentsuite/releases/download/v0.5.0-beta/silentsuite-android-v0.5.0-beta.apk ``` ### Windows Bridge ```powershell Invoke-WebRequest ` -Uri "https://github.com/silent-suite/silentsuite/releases/download/v0.5.0-beta/silentsuite-bridge-windows-x86_64.exe" ` -OutFile "silentsuite-bridge.exe" ``` ### macOS Bridge Apple Silicon: ```bash curl -LO https://github.com/silent-suite/silentsuite/releases/download/v0.5.0-beta/silentsuite-bridge-macos-arm64 chmod +x silentsuite-bridge-macos-arm64 ``` Intel: ```bash curl -LO https://github.com/silent-suite/silentsuite/releases/download/v0.5.0-beta/silentsuite-bridge-macos-x86_64 chmod +x silentsuite-bridge-macos-x86_64 ``` ### Linux Bridge x86-64: ```bash curl -LO https://github.com/silent-suite/silentsuite/releases/download/v0.5.0-beta/silentsuite-bridge-linux-x86_64 chmod +x silentsuite-bridge-linux-x86_64 ``` ARM64: ```bash curl -LO https://github.com/silent-suite/silentsuite/releases/download/v0.5.0-beta/silentsuite-bridge-linux-arm64 chmod +x silentsuite-bridge-linux-arm64 ``` ### Self-host ```bash curl -fsSL https://raw.githubusercontent.com/silent-suite/silentsuite/main/self-host/install.sh | bash ```
Jul 11, 2026 0.4.0-beta

Updates SilentSuite Android for the 0.4.0-beta release while retaining Google Play 16 KB native library compatibility. This release primarily improves the wider SilentSuite web, sync, payment, and Bridge experience.
Jun 21, 2026 0.3.0-beta
Jun 3, 2026 0.2.0-beta

v0.2.0-beta: multiple calendars, address books, and task lists; Android export backups; clearer sync states; refreshed branding; and Bitcoin/Lightning annual signup via BTCPay.