# Smell Annotator vs Hidden Camera Finder |Detector

The clearest difference is rating: Hidden Camera Finder |Detector at 4.4 against Smell Annotator's 1.0. Hidden Camera Finder |Detector also leads on ratings volume (1.5K vs 1). Smell Annotator's advantage is in-app purchases (none vs 4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Hidden Camera Finder |Detector sells 4 in-app purchases, starting at $6.99 per 7 days. Smell Annotator asks for nothing beyond the download.

Hidden Camera Finder |Detector holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: Hidden Camera Finder |Detector has 1.5K ratings behind it against 1, so its average is the more settled of the two.

Smell Annotator ships an update monthly, Hidden Camera Finder |Detector every 2 months. The most recent releases landed on September 14, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Smell Annotator | Hidden Camera Finder |Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/smell-annotator/id1607528175/reviews) | **[4.4 (1.5K ratings)](https://appshunter.io/ios/app/hidden-camera-finder-detector/id6451442164/reviews)** |
| Number of ratings | 1 | **1.5K** |
| Positive reviews | — | 75.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 53 MB | 42 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SmartNanotubes Technologies](https://appshunter.io/developer/1607528177) | [Nana Tsereteli](https://appshunter.io/developer/1714615403) |

## What reviewers say

### Smell Annotator

[App page](https://appshunter.io/ios/app/smell-annotator/id1607528175)

This application enables machines to digitally sense and analyze smells using nanomaterial-based technology. It allows users to view, annotate, and recognize smell measurements in real-time, functioning as part of a developer kit.

**Highlights:** Smell recognition, Smell digitalization and annotation, Saving and loading measurements, Real-time measurement visualization, Offline data collection, Graph synchronization

**Features:** Vision Pro support

**In-app purchases:** none


### Hidden Camera Finder |Detector

[App page](https://appshunter.io/ios/app/hidden-camera-finder-detector/id6451442164)

This app helps you find hidden surveillance devices like spy cameras and listening devices in your surroundings. It offers tools to scan for suspicious objects, safeguard your Wi-Fi network, and secure evidence of detected devices.

**Highlights:** Detect hidden cameras and microphones, Scan everyday items for surveillance devices, Night vision mode for low-light detection, Display exact location coordinates, Safeguard Wi-Fi network, Secure vault for photos and videos

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hidden Spy Device Detector | $6.99 | per 7 days |
| Monthly Unlimited Access | $10.99 | per month |
| 3 Monthly Unlimited Access | $19.99 | per 3 months |
| Security Camera Spy App | $39.99 | per year |

**What reviewers like**

- 🚀 Works great
- 👍 Easy to use
- 🔒 Helps detect hidden cameras
- 🔍 Accurate camera detection
- 👍 Useful night vision feature

**What reviewers complain about**

- 🐛 Inaccurate object detection
- 🤔 Confusing interface
- 💰 Expensive subscription
- 🤨 Questionable free trial
- 🤷‍♀️ Lack of instructions

**Reported bugs**

- Inconsistent camera detection
- Crashes and freezes
- Subscription issues
- Unlocking problems

**Requested features**

- More detailed tutorials
- Improved object recognition
- Free access to all features
- Expanded device detection capabilities
- Integration with other security tools


## Frequently asked questions

### Is Smell Annotator free?

Smell Annotator is free to download, with no in-app purchases.

### Is Hidden Camera Finder |Detector free?

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

### Which has better reviews, Smell Annotator or Hidden Camera Finder |Detector?

Hidden Camera Finder |Detector is rated higher. Smell Annotator averages 1.0 out of 5 from 1 ratings, while Hidden Camera Finder |Detector averages 4.4 from 1.5K ratings.

### Do Smell Annotator or Hidden Camera Finder |Detector have ads?

Neither Smell Annotator nor Hidden Camera Finder |Detector shows ads.

### Which is updated more often, Smell Annotator or Hidden Camera Finder |Detector?

Smell Annotator ships an update monthly, and Hidden Camera Finder |Detector every 2 months. Most recently, Smell Annotator was updated on September 14, 2026 and Hidden Camera Finder |Detector on September 20, 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.*