Planck: Secure Clipboard Sync for Android #

By Planck: Jeffrey Li, Joey Wang, Kevin Huang, Judy Yang, Trevor Du, Addison Chen

App Description #

Planck is an Android clipboard history app built to help users save, search, and reuse copied content across devices. Serving as the mobile companion to an existing desktop clipboard manager (which supports Windows, macOS, and Linux), Planck extends that seamless experience to your phone. It gives users a secure way to access clipboard history, search through old items, and sync content between their phone and computer.

Whether you are using it as a personal clipboard history tool or a secure bridge between mobile and desktop workflows, Planck combines convenience with strict security.

💡 Core Use Cases #

Planck is designed to solve everyday copy-paste frustrations. It is perfect for:

Recovering Lost Text: Easily recover text that had been overwritten in the clipboard.
Cross-Device Handoffs: Moving short snippets, such as a course code or link, between a phone and a laptop without messaging yourself.
Quick Access: Reusing frequently needed content like standard replies or pinned templates.

Home screen with mixed clipboard history

✨ Key Features #

Unified, Searchable History: Browse a centralized history screen backed by local storage. You can browse, search, and manage past items.
On-Device OCR (Optical Character Recognition): Search across both plain clipboard text and OCR text extracted from images. This is especially useful for screenshots or copied images that contain words you may want to find later.
Native Android Integration: Add content using standard Android interactions instead of manually retyping or pasting into the app. It supports text and image sharing directly into the app via the Android share sheet.
End-to-End Encryption: Content is encrypted before it is uploaded for sync. Passwords derive the encryption keys, ensuring your synced data remains entirely private.
Cloud Synchronization: Features password-protected synchronization compatible with the wider Planck system. It uses a practical sync model with manual refresh and visible status feedback.

🛠️ Built for Android #

Planck doesn’t just copy desktop behavior; it adapts securely to the mobile environment. Because Android restricts background clipboard polling, Planck utilizes explicit, privacy-aware user actions. By relying on share intents, notification capture, and in-app actions, Planck balances the convenience of cross-device synchronization with platform compliance and safety.