# Hidden Camera Detector vs Smart Purifier

The clearest difference is rating: Hidden Camera Detector at 3.6 against Smart Purifier's 1.0. Hidden Camera Detector also leads on ratings volume (1.8K vs 1) and review sentiment (21% vs 0%). Smart Purifier's advantage is in-app purchases (none vs 2) and update cadence (fortnightly vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Hidden Camera Detector sells 2 in-app purchases, starting at $9.99 per month. Smart Purifier asks for nothing beyond the download.

Hidden Camera Detector holds the better App Store score, 3.6 against 1.0. That said, the two scores are not equally well evidenced: Hidden Camera Detector has 1.8K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 21% of Hidden Camera Detector's written reviews are positive against 0% of Smart Purifier's.

Hidden Camera Detector ships an update every 3 months, Smart Purifier fortnightly. The most recent releases landed on September 29, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | Hidden Camera Detector | Smart Purifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (1.8K ratings)](https://appshunter.io/ios/app/hidden-camera-detector/id532882360/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/smart-purifier/id1535735160/reviews) |
| Number of ratings | **1.8K** | 1 |
| Positive reviews | **20.9% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 72 MB | 115 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [LSC, LLC](https://appshunter.io/developer/532882363) | [VIETTEL GROUP](https://appshunter.io/developer/1529233160) |

## What reviewers say

### Hidden Camera Detector

[App page](https://appshunter.io/ios/app/hidden-camera-detector/id532882360)

Detect hidden cameras and spy devices using your phone's camera, Wi-Fi, network, and Bluetooth. Features AI image recognition and a network scanner to find suspicious connections and remotely accessible devices.

**Highlights:** AI Spy Camera Image Recognition, Lens & IR Detector, Network & Wi-Fi Scanner, Remotely Accessible Device Scanner, Spy Camera Library, Expert Help & Guidance

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HCD App Premium | $9.99 | per month |
| HCD App Premium Annually | $39.99 | per year |


### Smart Purifier

[App page](https://appshunter.io/ios/app/smart-purifier/id1535735160)

Monitor and control your Smart Purifier air quality device. View real-time air quality data and adjust settings remotely. Ensure a healthy living environment with this connected appliance management tool.

**Highlights:** Remote device control, Real-time air quality monitoring, Device settings adjustment, Air purification management, Connected appliance integration

**In-app purchases:** none


## Frequently asked questions

### Is Hidden Camera Detector free?

Hidden Camera Detector is free to download, with in-app purchases available.

### Is Smart Purifier free?

Smart Purifier is free to download, with no in-app purchases.

### Which has better reviews, Hidden Camera Detector or Smart Purifier?

Hidden Camera Detector is rated higher. Hidden Camera Detector averages 3.6 out of 5 from 1.8K ratings, while Smart Purifier averages 1.0 from 1 ratings.

### Do Hidden Camera Detector or Smart Purifier have ads?

Neither Hidden Camera Detector nor Smart Purifier shows ads.

### Which is updated more often, Hidden Camera Detector or Smart Purifier?

Hidden Camera Detector ships an update every 3 months, and Smart Purifier fortnightly. Most recently, Hidden Camera Detector was updated on September 29, 2026 and Smart Purifier on June 4, 2026.

---

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