# Locklizard Safeguard Viewer vs SimpleDB

The clearest difference is price: Locklizard Safeguard Viewer at Free against SimpleDB's $1.99. Locklizard Safeguard Viewer also leads on update cadence (every 2 months vs every 48 months) and ratings volume (8 vs 1). SimpleDB's advantage is rating (5.0 vs 1.8). On ads, in-app purchases and device support there is nothing between them.

Locklizard Safeguard Viewer is free to download; SimpleDB costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SimpleDB holds the better App Store score, 5.0 against 1.8. That said, the two scores are not equally well evidenced: Locklizard Safeguard Viewer has 8 ratings behind it against 1, so its average is the more settled of the two.

Locklizard Safeguard Viewer ships an update every 2 months, SimpleDB every 48 months. The most recent releases landed on September 23, 2026 and August 15, 2026 respectively.

## The numbers

| Metric | Locklizard Safeguard Viewer | SimpleDB |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [1.8 (8 ratings)](https://appshunter.io/ios/app/locklizard-safeguard-viewer/id627385747/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/simpledb/id1392905407/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | 10.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 48 months |
| Monetization | **Free** | Paid |
| Size | 74 MB | 2 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LockLizard](https://appshunter.io/developer/627385830) | [Maysoft Inc.](https://appshunter.io/developer/1008067211) |

## What reviewers say

### Locklizard Safeguard Viewer

[App page](https://appshunter.io/ios/app/locklizard-safeguard-viewer/id627385747)

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.

**Highlights:** View secure PDF documents, Supports PDC files, DRM protected PDF viewing, iOS compatibility, Free to use

**Features:** macOS Compatibility

**In-app purchases:** none


### SimpleDB

[App page](https://appshunter.io/ios/app/simpledb/id1392905407)

Access and manage Amazon SimpleDB data directly from your mobile device. Browse domains, build custom queries, and export results to CSV for easy sharing and archiving. Securely store your AWS credentials for convenient access.

**Highlights:** Connect to AWS profile, Browse SimpleDB domains, Table view for attributes, Custom SELECT query builder, CSV export, Secure credential storage

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Locklizard Safeguard Viewer free?

Locklizard Safeguard Viewer is free to download, with no in-app purchases.

### Is SimpleDB free?

SimpleDB costs $1.99, with no in-app purchases.

### Which has better reviews, Locklizard Safeguard Viewer or SimpleDB?

SimpleDB is rated higher. Locklizard Safeguard Viewer averages 1.8 out of 5 from 8 ratings, while SimpleDB averages 5.0 from 1 ratings.

### Do Locklizard Safeguard Viewer or SimpleDB have ads?

Neither Locklizard Safeguard Viewer nor SimpleDB shows ads.

### Which is updated more often, Locklizard Safeguard Viewer or SimpleDB?

Locklizard Safeguard Viewer ships an update every 2 months, and SimpleDB every 48 months. Most recently, Locklizard Safeguard Viewer was updated on September 23, 2026 and SimpleDB on August 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*