--- title: "PDF Lock & Unlock — App Overview" url: https://marlvel.ai/apps/pdf-lock-unlock category: Utilities developer: StudyBridge LLC platforms: ios, android rating: N/A (0 ratings) pricing: paid report_level: overview generated: 2026-05-05 last_verified: "2026-05-05T04:42:17.461Z" --- > **Key Insight:** This is a privacy-focused, offline-only PDF utility that operates on a one-time purchase model without subscriptions or tracking. | Metric | Value | |--------|-------| | Category | Utilities | | Rating | N/A ★ (0) | | Pricing | paid | | Platforms | iOS, Android | | Latest Version (iOS) | 1.0.0 | | Latest Version (Android) | 1.0.1 | | Developer | StudyBridge LLC | ## What is PDF Lock & Unlock? PDF Lock & Unlock is a utility tool that enables users to password-protect PDF files or remove existing security restrictions. The app distinguishes itself by performing all document processing locally on the device, ensuring no data is transmitted over the internet. ## Key Features - **PDF Encryption**: Allows users to secure PDF files by applying a password. - **PDF Decryption**: Enables the removal of passwords from PDF files when access is required. - **Offline Processing**: Ensures all document operations occur locally on the device without requiring an internet connection. ## Who is it for? Individuals and professionals who need to secure sensitive documents or manage password-protected PDF files offline. ## Links - [App Store](https://apps.apple.com/us/app/pdf-lock-unlock/id6756542477?uo=4) - [Google Play](https://play.google.com/store/apps/details?id=com.studybridgellc.pdflockerunlocker&hl=en&gl=us) - [Full Intelligence Report](https://marlvel.ai/apps/pdf-lock-unlock) --- *This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/pdf-lock-unlock).* *Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*