Locklizard Safeguard Viewer vs Unshared PDF Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Locklizard Safeguard Viewer
This free application allows users to view protected PDF documents on their iOS devices. It supports secure PDF files that have been protected using specific DRM security software.
- View secure PDF documents
- Supports PDC files
- DRM protected PDF viewing
- iOS compatibility
- Free to use
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Locklizard Safeguard Viewer for iOS is a FREE app that lets you view Locklizard secure PDF documents (PDC files) on the iPad and iPhone. Safeguard Secure PDF Viewer supports PDC files protected with Safeguard PDF Security and Enterprise PDF DRM. An installation video can be found at https://www.locklizard.com/Videos/Viewers/ios-viewer-install.mp4
Unshared PDF Reader
This free document reader allows you to easily open and view authorized PDF and .updf files. It is specifically designed for documents created by the PDF Unshare program.
- View PDF files
- View .updf files
- Supports authorized documents
- Free to use
- Designed for PDF Unshare program
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Unshared PDF Reader is a free document reader program for opening and viewing unshared PDF and .updf format files created by the PDF Unshare program. With Unshared PDF Reader, You can open and view authorized unshared PDF (.pdf, .updf formats) documents easily.
Screenshots
Verdict
The clearest difference is update cadence: Unshared PDF Reader at every 3 days against Locklizard Safeguard Viewer's every 2 months. Unshared PDF Reader also leads on iOS requirement (13.0 vs 15.6). Locklizard Safeguard Viewer's advantage is review sentiment (11% vs 0%). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Locklizard Safeguard Viewer ships an update every 2 months, Unshared PDF Reader every 3 days. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.
| Parameter | Locklizard Safeguard Viewer | Unshared PDF Reader |
|---|---|---|
| Price | Free | Free |
| Rating | 1.8 (8 ratings) — better | — |
| Positive reviews | 10.8% of reviews — better | 0.0% of reviews |
| Number of ratings | 8 — better | — |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 74 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | LockLizard | 迪 吴 |
Customer experience
Locklizard Safeguard Viewer
Unshared PDF Reader
In-app purchases
Locklizard Safeguard Viewer
No in-app purchases
Unshared PDF Reader
No in-app purchases
Questions
Is Locklizard Safeguard Viewer free?
Is Unshared PDF Reader free?
Do Locklizard Safeguard Viewer or Unshared PDF Reader have ads?
Which is updated more often, Locklizard Safeguard Viewer or Unshared PDF Reader?
Other comparisons
