PDF Lock & Unlock
StudyBridge LLC Utilities iPhoneiPadiPod touch
PDF Lock & Unlock is a paid Utilities app for iPhone and iPad by StudyBridge LLC. Requires iOS 15.1. Updated December 16, 2025.
- Price
- 0.99 USD
- on the App Store
- Size
- 25 MB
- Age 4+
- Updated
- Dec 16
- 2025 · v1.0.0
Screenshots
About 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.
App privacy
The developer, StudyBridge LLC, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to PDF Lock & Unlock
Looking for apps like PDF Lock & Unlock? Here are 6 similar apps on the App Store. The highest rated is QR SafeScan - Threat Detector (5.0/5), and 5 of the 6 are free to download.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| PDF Lock & Unlock | – | 0.99 USD | December 16, 2025 | |
| HELIO Morse Messenger | – | Free | Sep 24, 2026 | Compare |
| Monospace Input | – | 1.99 USD | Sep 22, 2026 | Compare |
| QR SafeScan - Threat Detector | 5.0 / 5 (1) | Free | Jan 8, 2026 | Compare |
| Link Check Lite | – | Free | Apr 17, 2025 | Compare |
| PDF Unlocker Pro | – | Free | Sep 26, 2025 | Compare |
| Basic Browser | – | Free | Oct 27, 2024 | Compare |
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