# Sentry Motion Detector Camera vs Momentra

The clearest difference is in-app purchases: Sentry Motion Detector Camera at none against Momentra's 1. Sentry Motion Detector Camera also leads on ads (none vs shown). Momentra's advantage is update cadence (every 4 days vs fortnightly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Momentra sells 1 one-off in-app purchase. Sentry Motion Detector Camera asks for nothing beyond the download.

Sentry Motion Detector Camera ships an update fortnightly, Momentra every 4 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Sentry Motion Detector Camera | Momentra |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Free | — |
| Size | 0 MB | 10 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [BigBalli Consulting llc](https://appshunter.io/developer/363765325) | [星域智慧科技股份有限公司](https://appshunter.io/developer/6774478924) |

## What reviewers say

### Sentry Motion Detector Camera

[App page](https://appshunter.io/ios/app/sentry-motion-detector-camera/id6740923419)

Transform an old phone into a dark-optimized motion-triggered security camera. It records clips when movement is detected and saves them directly to your device's photo library, offering a private and offline monitoring solution.

**Highlights:** Motion-triggered recording, Night vision capabilities, Records to photo library, Offline operation, No account or cloud needed, Screen stays dark during use

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

**In-app purchases:** none


### Momentra

[App page](https://appshunter.io/ios/app/momentra-action-camera-editor/id6802586543)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Momentra Pro: Action Camera | $7.99 | one-time |


## Frequently asked questions

### Is Sentry Motion Detector Camera free?

Sentry Motion Detector Camera is free to download, with no in-app purchases.

### Is Momentra free?

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

### Do Sentry Motion Detector Camera or Momentra have ads?

Momentra shows ads; Sentry Motion Detector Camera does not.

### Which is updated more often, Sentry Motion Detector Camera or Momentra?

Sentry Motion Detector Camera ships an update fortnightly, and Momentra every 4 days. Most recently, Sentry Motion Detector Camera was updated on November 4, 2026 and Momentra on October 31, 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.*