# Air Detector vs SecureDocs Sentry

Air Detector and SecureDocs Sentry are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Air Detector ships an update every 5 months, SecureDocs Sentry every 9 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Air Detector | SecureDocs Sentry |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 9 months |
| Size | 23 MB | 73 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Shenzhen Everbest Machinery Industry Co.,Ltd](https://appshunter.io/developer/564470332) | [Troy Group, Inc.](https://appshunter.io/developer/1294696579) |

## What reviewers say

### Air Detector

[App page](https://appshunter.io/ios/app/air-detector/id1644798469)

**Features:** macOS Compatibility

**In-app purchases:** none


### SecureDocs Sentry

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Air Detector free?

Air Detector is free to download, with no in-app purchases.

### Is SecureDocs Sentry free?

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

### Do Air Detector or SecureDocs Sentry have ads?

Neither Air Detector nor SecureDocs Sentry shows ads.

### Which is updated more often, Air Detector or SecureDocs Sentry?

Air Detector ships an update every 5 months, and SecureDocs Sentry every 9 months. Most recently, Air Detector was updated on November 3, 2026 and SecureDocs Sentry on October 30, 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.*