# PDF Locker: PDF Wolf — Password Protect & Secure PDFs

> Password Protect & Secure PDFs (iPhone/iPad app by Vikram Singh.)

- Source: https://appshunter.io/ios/app/pdf-locker-pdf-wolf/id6745149950 (this page in markdown: same URL + `.md`)
- Developer: [Vikram Singh](https://appshunter.io/developer/1800895019)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English
- Released: 2025-04-28
- Data updated: 2026-08-25
- User reviews in markdown: https://appshunter.io/ios/app/pdf-locker-pdf-wolf/id6745149950/reviews.md

## What is PDF Locker?

PDF WOLF lets you add password protection to any PDF, directly on your device. No cloud uploads. No accounts. No servers involved. Your files stay private from start to finish.

HOW IT WORKS

Import any PDF from Files, iCloud Drive, or any app on your device. Choose to generate a cryptographically strong random password automatically, or enter your own. PDF WOLF applies industry-standard PDF encryption on-device, then verifies the result before presenting it to you.

Once protection is complete, you can preview the result. Saving the protected PDF to Files or sharing it directly requires a Pro plan.

WHAT YOU GET

— Import any PDF from Files or iCloud Drive
— Generate a strong random password with one tap
— Enter and confirm your own password manually
— On-device encryption — your PDF never leaves your iPhone or iPad
— Verification step confirms encryption worked before you save
— Password vault: all passwords stored securely in your device's Keychain
— Reveal, copy, or reference any saved password from the Passwords tab
— Protection history with thumbnail previews of past protected files
— Save protected PDFs directly to Files (Pro)
— Share protected PDFs via AirDrop, Mail, Messages and more (Pro)

PRIVACY FIRST

PDF WOLF uses no analytics, no tracking, and no advertising SDKs. It communicates only with Apple's App Store to process purchases. Everything else happens entirely on your device.

PRO PLAN

A Pro plan (Weekly or Lifetime) unlocks the ability to save protected PDFs to the Files app and share them via the iOS share sheet. The protection process itself can be experienced before purchasing — Pro gates only the final file delivery.

Passwords are stored in your device's Keychain, the same secure storage used by banks and password managers. PDF WOLF never sees or stores your passwords on any server.

Terms of Use (EULA):  https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy policy:  https://1kbapps.com/pdfwolf/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Mobile Pro Access Weekly | $4.99 | per 7 days |
| Mobile Pro Access Yearly | $19.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro Lifetime Unlock | $19.99 | one-time |



## Version history (last 4 releases)

### 3.0 — 2026-04-05

Version 3.0 — Rebuilt from the ground up.

PASSWORDS TAB
A dedicated vault for every password you've created. Reveal, copy, or reference passwords for any protected file — all secured in your device's Keychain.

PROTECTION HISTORY
Browse thumbnail previews of every PDF you've protected. Save or share any past result directly from the History tab.

LIFETIME PLAN
A one-time purchase option is now available alongside the Weekly plan.

REDESIGNED INTERFACE
Completely fresh UI with Dark Mode, refined animations, and a cleaner protection flow throughout.

### 2.0 — 2026-02-12

• Faster PDF locking and smoother overall performance
• Fixed iPad issues with share sheet and modal presentation
• Improved file import reliability from Files/iCloud
• Better handling for larger PDFs
• Stability improvements and bug fixes

### 1.5 — 2025-09-16

iPad refresh: Centered, constrained layouts for a cleaner look.
Polished backgrounds on Settings and Passwords for iPad.
Smoother navigation with improved stability.
iOS 15 compatibility improvements (Navigation view fallbacks).
Minor UI refinements and bug fixes.

### 1.0 — 2025-04-28

No release notes.

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## More apps by Vikram Singh

- [Page Note](https://appshunter.io/ios/app/page-note/id6743033688)
- [Liturgy - Gongyo Lite](https://appshunter.io/ios/app/liturgy-gongyo-lite/id6743516116)
- [Appointment Reminder- Remindex](https://appshunter.io/ios/app/appointment-reminder-remindex/id6752260157)
- [Nichiren Liturgy - Gongyo](https://appshunter.io/ios/app/nichiren-liturgy-gongyo/id6755279543)
- [Merge PDFs](https://appshunter.io/ios/app/merge-pdfs/id6755594664)

All apps by Vikram Singh: https://appshunter.io/developer/1800895019

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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 2026-08-25.*