Keep private research, personal journals, and sensitive reading material secure behind an encrypted vault protected by a 4-digit PIN.
Why Use Locked Libraries?
Reading is often deeply personal. Whether you keep private journals, study sensitive medical literature, conduct proprietary research, or simply share your tablet with family members, certain books require genuine confidentiality.
Rather than relying on superficial hiding tricks, GemReader provides Locked Libraries. When you lock a collection, the entire folder is secured on your device with industry-standard AES-256 encryption. Without your 4-digit PIN, neither third-party apps nor file managers on your phone can inspect the text inside.
What You'll Need
Before locking a collection, ensure you have:
• **Platforms**: GemReader installed on Android or iOS. • **Prerequisites**: At least one existing collection with books or notes in your library. • **Security**: A memorable 4-digit numerical PIN code.
Step-by-Step Instructions
1. Open your **Library** and tap the collection folder you wish to secure. 2. Tap the **⋮** menu icon in the collection header and choose **Lock Collection**. 3. A secure numerical keypad will appear on screen. Enter a memorable 4-digit PIN. 4. Re-enter the identical 4-digit PIN to confirm it. 5. The folder is encrypted immediately on your storage drive. A distinct **padlock icon** will appear beside the collection title on your bookshelf. 6. To open the folder in the future, simply tap the locked collection and enter your 4-digit PIN. 7. When you exit the collection or switch away to another app, the folder locks itself again automatically.
Helpful Tips & Common Questions (Librarian's Advice)
• **Concealed from Global Searches**: Highlights, notes, and book titles from Locked Libraries are hidden from the global Gems Library and library search bar until you enter your vault PIN. • **True Storage Encryption**: Files inside a Locked Library are encrypted directly on your device drive. Even if someone connects your phone to a computer, the raw text cannot be read without unlocking. • **Memorable PIN Selection**: Because GemReader operates under strict zero-knowledge principles with no cloud servers, forgotten PINs cannot be recovered remotely. Choose a code you will remember or store it in your password manager.
Try it yourself