# MRT vs airHeaterByBLE

The clearest difference is rating: airHeaterByBLE at 2.3 against MRT's 1.5. MRT's advantage is iOS requirement (9.0 vs 13.0). On price, review sentiment, ratings volume and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

airHeaterByBLE holds the better App Store score, 2.3 against 1.5. Both are backed by a comparable volume of ratings — 28 and 76 respectively. Written reviews point the same way: 8% of MRT's written reviews are positive against 15% of airHeaterByBLE's.

MRT ships an update every 2 months, airHeaterByBLE every 3 months. The most recent releases landed on September 21, 2026 and September 2, 2026 respectively.

## The numbers

| Metric | MRT | airHeaterByBLE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.5 (28 ratings)](https://appshunter.io/ios/app/mrt-camera/id1474609736/reviews) | **[2.3 (76 ratings)](https://appshunter.io/ios/app/airheaterbyble/id1618452682/reviews)** |
| Number of ratings | 28 | **76** |
| Positive reviews | 8.0% of reviews | **14.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | Free |
| Size | 43 MB | 55 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Huimei Shangpin Technology Co. LTD](https://appshunter.io/developer/1475442272) | [向洋 周](https://appshunter.io/developer/1616374203) |

## What reviewers say

### MRT

[App page](https://appshunter.io/ios/app/mrt-camera/id1474609736)

View your car's surroundings in real-time using a connected WiFi camera. Capture photos and record videos directly through the mobile application. Includes a helpful reversing ruler for easier parking.

**Highlights:** Real-time car surroundings view, Take photos via mobile app, Record video via mobile app, Reversing ruler functionality

**In-app purchases:** none


### airHeaterByBLE

[App page](https://appshunter.io/ios/app/airheaterbyble/id1618452682)

Control and monitor your vehicle's auxiliary heater directly from your smartphone via Bluetooth. This app enables two-way communication, allowing you to adjust settings and view the operational status of your heater remotely.

**Highlights:** Bluetooth connectivity, Two-way control, Operational status indication, Remote monitoring, Smartphone integration

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

**In-app purchases:** none

**What reviewers like**

- ✅ Basic heater control functionality works
- 👍 Clean layout and easy navigation (when working)
- 🔗 Bluetooth connectivity established successfully
- 📱 Remote control from inside house convenient
- ⚙️ Temperature and mode adjustment available

**What reviewers complain about**

- 🐛 App shuts down heater when closed or minimized
- 🔒 Excessive permission requests (location, camera, photos, microphone)
- 🚫 Requires location services and cell service to function
- ⚠️ Privacy concerns and suspected data collection/selling
- 🔄 Frequent connection failures and disconnections

**Reported bugs**

- App shuts heater off when user switches apps or closes app
- Power button placement causes accidental activation when closing app
- Cannot reconnect after initial connection on iPhone
- Location authorization error preventing app use
- Heater randomly starts/stops without user input

**Requested features**

- Multiple on/off timers (8+ total) for scheduling
- Fahrenheit temperature display option
- Access to all controller settings via app
- Altitude/elevation adjustment capability
- Fuel level indicator


## Frequently asked questions

### Is MRT free?

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

### Is airHeaterByBLE free?

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

### Which has better reviews, MRT or airHeaterByBLE?

airHeaterByBLE is rated higher. MRT averages 1.5 out of 5 from 28 ratings, while airHeaterByBLE averages 2.3 from 76 ratings.

### Do MRT or airHeaterByBLE have ads?

Neither MRT nor airHeaterByBLE shows ads.

### Which is updated more often, MRT or airHeaterByBLE?

MRT ships an update every 2 months, and airHeaterByBLE every 3 months. Most recently, MRT was updated on September 21, 2026 and airHeaterByBLE on September 2, 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.*