# PDF Lock & Unlock — Secure PDF with Password

> Secure PDF with Password (iPhone/iPad app by StudyBridge LLC.)

- Source: https://appshunter.io/ios/app/pdf-lock-and-unlock/id6756542477 (this page in markdown: same URL + `.md`)
- Developer: [StudyBridge LLC](https://appshunter.io/developer/1830101876)
- Category: Utilities, Productivity
- Price: $0.99
- Age rating: 4+
- Requires: iOS 15.1 · 25 MB
- Languages: American English
- Released: 2025-12-15
- Data updated: 2026-06-25
- User reviews in markdown: https://appshunter.io/ios/app/pdf-lock-and-unlock/id6756542477/reviews.md

## What is PDF Lock & Unlock?

PDF Lock & Unlock lets you securely protect your PDF files with a password or remove the password when you need access again.

Everything works fully offline — your documents never leave your device.

Key Features
• Lock PDFs with a password
• Unlock PDFs using the correct password
• Fully offline — no internet, no server
• Fast and lightweight
• Simple and clean interface

Your privacy matters. All PDF processing happens locally on your device.

Ideal for protecting sensitive documents, sharing secured PDFs, or removing passwords from your own files.

No subscriptions. No tracking. Just a focused PDF utility.


## Version history (last 1 release)

### 1.0.0 — 2025-12-16

No release notes.

## More apps by StudyBridge LLC

- [StudyBridge - F1 Visa Guide](https://appshunter.io/ios/app/studybridge-f1-visa-guide/id6749338186)
- [HEIC Converter: JPG PDF PNG](https://appshunter.io/ios/app/heic-converter-jpg-pdf-png/id6749519975)
- [PDF Merger Expert](https://appshunter.io/ios/app/pdf-merger-expert/id6749808143)
- [DocuOffice: PDF & Word Editor](https://appshunter.io/ios/app/docuoffice-pdf-and-word-editor/id6751174553)
- [Image to PDF Expert](https://appshunter.io/ios/app/image-to-pdf-expert/id6751416106)
- [ID Photo Maker: Passport ID](https://appshunter.io/ios/app/id-photo-maker-passport-id/id6751552756)

All apps by StudyBridge LLC: https://appshunter.io/developer/1830101876

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*