# PromptSentry vs SentryBlack

The clearest difference is ads: PromptSentry at none against SentryBlack's shown. PromptSentry also leads on update cadence (every 5 days vs fortnightly). SentryBlack's advantage is iOS requirement (17.0 vs 26.4). On price, in-app purchases and device support there is nothing between them.

Both are free to download. PromptSentry 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.

PromptSentry ships an update every 5 days, SentryBlack fortnightly. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | PromptSentry | SentryBlack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Fortnightly |
| Size | 378 MB | 17 MB |
| Requires iOS | 26.4 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [TOLGA BARIS KOC](https://appshunter.io/developer/1828512205) | [Matthew Wong](https://appshunter.io/developer/6774040057) |

## What reviewers say

### PromptSentry

[App page](https://appshunter.io/ios/app/promptsentry/id6762153225)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PromptSentry Ultra | $8.99 | 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 PromptSentry free?

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

### Is SentryBlack free?

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

### Do PromptSentry or SentryBlack have ads?

SentryBlack shows ads; PromptSentry does not.

### Which is updated more often, PromptSentry or SentryBlack?

PromptSentry ships an update every 5 days, and SentryBlack fortnightly. Most recently, PromptSentry was updated on October 12, 2026 and SentryBlack on October 3, 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.*