Apps by 坤 刘
PDF Vault app icon

Productivity

PDF Vault

坤 刘

Free download In-app purchases
Open on Apple

About this app

PDF Vault is an easy to use utility to store and encrypt your PDF files. Store and encrypt PDF files - 2 Steps: 1. Launch "PDF Vault", set your password. (First time required). 2. Click the 'Add PDF...' button to add PDF files. If you choose a directory, you will add all the PDF files below. After adding pdfs to the app, they are password-protected and can only be accessed by entering a user-defined password. This helps to prevent other people from seeing private pdfs and ensures higher protection against thefts. 5 PDFs can be stored and encrypted for free. Unlimited PDF files storage and encryption.(in-app purchase required, $1.99). Decrypt and move PDF files - 1 step: 1. Click the ’Move to…’ button to decrypt and move the selected PDF files to other directories. Delete useless PDF files - 1 step: 1. Click the ‘Delete’ button to delete the useless PDF files. Lock the Application - 1 step: 1. Click the ‘Lock’ button to lock the app immediately.

Latest release

What’s New

Version 3.0.1 Aug 2, 2018

Fixed minor bugs.

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
0 ratings
0 Aug 8, 2026 · 0 ratings Aug 8, 2026

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current Free
Historical low Free
Paid → free
Price history
Current Free
Free Aug 8, 2026 · Free Aug 8, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Aug 8, 2026 · 12:08 AM Free

Screenshots

PDF Vault iPhone screenshotPDF Vault iPhone screenshot