# SecureDocs Sentry vs BluBlu Sentry

The clearest difference is update cadence: BluBlu Sentry at fortnightly against SecureDocs Sentry's every 9 months. SecureDocs Sentry's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SecureDocs Sentry ships an update every 9 months, BluBlu Sentry fortnightly. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | SecureDocs Sentry | BluBlu Sentry |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Fortnightly** |
| Size | 73 MB | 74 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Troy Group, Inc.](https://appshunter.io/developer/1294696579) | [Blublu Tech Inc](https://appshunter.io/developer/1835047735) |

## What reviewers say

### SecureDocs Sentry

[App page](https://appshunter.io/ios/app/securedocs-sentry/id6739139524)

**Features:** macOS Compatibility

**In-app purchases:** none


### BluBlu Sentry

[App page](https://appshunter.io/ios/app/blublu-sentry/id6761701658)

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

**In-app purchases:** none


## Frequently asked questions

### Is SecureDocs Sentry free?

SecureDocs Sentry is free to download, with no in-app purchases.

### Is BluBlu Sentry free?

BluBlu Sentry is free to download, with no in-app purchases.

### Do SecureDocs Sentry or BluBlu Sentry have ads?

Neither SecureDocs Sentry nor BluBlu Sentry shows ads.

### Which is updated more often, SecureDocs Sentry or BluBlu Sentry?

SecureDocs Sentry ships an update every 9 months, and BluBlu Sentry fortnightly. Most recently, SecureDocs Sentry was updated on October 9, 2026 and BluBlu Sentry on October 7, 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.*