# Tracer vs SweepScan

The clearest difference is rating: SweepScan at 4.7 against Tracer's 3.7. SweepScan also leads on ratings volume (66 vs 3). Tracer's advantage is in-app purchases (none vs 6) and update cadence (fortnightly vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SweepScan sells 6 in-app purchases, starting at $2.99 per 7 days. Tracer asks for nothing beyond the download.

SweepScan holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: SweepScan has 66 ratings behind it against 3, so its average is the more settled of the two.

Tracer ships an update fortnightly, SweepScan every 3 months. Both last shipped on November 4, 2026.

## The numbers

| Metric | Tracer | SweepScan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/tracer-gas-detector/id6473568941/reviews) | **[4.7 (66 ratings)](https://appshunter.io/ios/app/sweepscan-camera-detector/id6499238001/reviews)** |
| Number of ratings | 3 | **66** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 37 MB | 59 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [ReFleX Wireless Inc.](https://appshunter.io/developer/666581212) | [SK LABS LIMITED](https://appshunter.io/developer/1651362333) |

## What reviewers say

### Tracer

[App page](https://appshunter.io/ios/app/tracer-gas-detector/id6473568941)

This app works with a smartphone-powered USB device to detect various gas leaks like methane and formaldehyde. It provides real-time monitoring and alerts to enhance safety at home or work. Pinpoint emission sources effortlessly for peace of mind.

**Highlights:** Detects methane, propane, formaldehyde, hydrogen, Smartphone-powered via USB, Real-time monitoring and alerts, Pinpoints gas emission sources, Enhances safety and peace of mind

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

**In-app purchases:** none


### SweepScan

[App page](https://appshunter.io/ios/app/sweepscan-camera-detector/id6499238001)

Detect hidden cameras using your device's sensors and network scanning. Ensure your privacy in hotels, rentals, or homes by identifying suspicious Bluetooth devices, Wi-Fi streams, and magnetic fields. Get detailed device information to pinpoint potential threats.

**Highlights:** Bluetooth hidden camera scanner, Wi-Fi hidden camera scanner, Magnetic field sensor, Detailed device information, Privacy protection

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sweep Pro 1 Week | $2.99 | per 7 days |
| Sweep Pro 1 Month | $4.99 | per month |
| Sweep Pro 1 Month | $6.99 | per month |
| Sweep Pro 1 Week 7.99 | $7.99 | per 7 days |
| Sweep Pro Annual Subscription | $39.99 | per year |
| Sweep Pro Annual Subscription | $49.99 | per year |


## Frequently asked questions

### Is Tracer free?

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

### Is SweepScan free?

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

### Which has better reviews, Tracer or SweepScan?

SweepScan is rated higher. Tracer averages 3.7 out of 5 from 3 ratings, while SweepScan averages 4.7 from 66 ratings.

### Do Tracer or SweepScan have ads?

Neither Tracer nor SweepScan shows ads.

### Which is updated more often, Tracer or SweepScan?

Tracer ships an update fortnightly, and SweepScan every 3 months. Most recently, Tracer was updated on November 4, 2026 and SweepScan on November 4, 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.*