# Mobile Guard Sentrynet vs SentryBlack

The clearest difference is ads: Mobile Guard Sentrynet at none against SentryBlack's shown. Mobile Guard Sentrynet also leads on update cadence (daily vs fortnightly). SentryBlack's advantage is device support (3 vs 1) and iOS requirement (17.0 vs 26.0). On price and in-app purchases there is nothing between them.

Both are free to download. Mobile Guard Sentrynet sells 1 one-off in-app purchase and SentryBlack sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Mobile Guard Sentrynet ships an update daily, SentryBlack fortnightly. The most recent releases landed on September 18, 2026 and August 23, 2026 respectively.

## The numbers

| Metric | Mobile Guard Sentrynet | SentryBlack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Fortnightly |
| Size | 6 MB | 17 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Sentrynet Srl](https://appshunter.io/developer/1857584223) | [Matthew Wong](https://appshunter.io/developer/6774040057) |

## What reviewers say

### Mobile Guard Sentrynet

[App page](https://appshunter.io/ios/app/mobile-guard-sentrynet/id6789548297)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10-minute analysis units | $3.99 | one-time |


### SentryBlack

[App page](https://appshunter.io/ios/app/sentryblack-security-camera/id6790313702)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SentryBlack Pro (Monthly) | $4.99 | per month |
| SentryBlack Pro (Yearly) | $29.99 | per year |


## Frequently asked questions

### Is Mobile Guard Sentrynet free?

Mobile Guard Sentrynet is free to download, with in-app purchases available.

### Is SentryBlack free?

SentryBlack is free to download, with in-app purchases available.

### Do Mobile Guard Sentrynet or SentryBlack have ads?

SentryBlack shows ads; Mobile Guard Sentrynet does not.

### Which is updated more often, Mobile Guard Sentrynet or SentryBlack?

Mobile Guard Sentrynet ships an update daily, and SentryBlack fortnightly. Most recently, Mobile Guard Sentrynet was updated on September 18, 2026 and SentryBlack on August 23, 2026.

---

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