M vs OBD2 Cat
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
M
Control your car remotely using your iPhone. Functions include arming, disarming, and locating your vehicle via Bluetooth 4.0 connection to a digital key system.
- Remote car arming
- Remote car disarming
- Vehicle location finder
- Bluetooth 4.0 connectivity
- iPhone control
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使用AOD Smart 系统必须iphone6及以上，手机控车通过蓝牙4.0与本公司安装的数字钥匙系统与汽车通讯，实现手机控制汽车：设防、撤防、寻车等功能.
OBD2 Cat
This app reads diagnostic trouble codes and live vehicle data from compatible cars using a Bluetooth OBD2 adapter. It helps drivers understand dashboard warnings by checking engine codes, viewing sensor data, and retrieving vehicle identification information.
- Read diagnostic trouble codes (DTCs)
- Clear supported trouble codes
- View live engine and sensor data
- Check VIN, make, model, and year
- Auto Scan for codes
- View OBD protocol and connection status
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Your car has a story. OBD2 Cat helps you read the clues. OBD2 Cat is a straightforward Bluetooth OBD2 car scanner for compatible vehicles and adapters. Read diagnostic trouble codes, view live vehicle data, and check key vehicle details from your iPhone. With OBD2 Cat, you can: - Read Check Engine diagnostic trouble codes (DTCs) - Clear supported trouble codes - View supported live engine and sensor data - Check and copy your VIN, plus available make, model, and model year - Turn on Auto Scan to scan for codes after connecting - See the active OBD protocol and connection status Designed for drivers who want a simple first look when a dashboard warning appears, without the clutter of a professional workshop tool. Use a Bluetooth OBD2 adapter compatible with your iPhone and vehicle. If you use an ELM327-style adapter, make sure it supports Bluetooth Low Energy (BLE). Important: Clearing a trouble code does not repair the underlying issue. A warning light may return if the fault remains. For safety-critical warnings or persistent problems, have the vehicle inspected by a qualified technician.
Screenshots
Verdict
The clearest difference is rating: OBD2 Cat at 5.0 against M's 1.0. OBD2 Cat also leads on update cadence (fortnightly vs every 2 months). M's advantage is iOS requirement (11.0 vs 16.0). On price, ratings volume, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
OBD2 Cat holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
M ships an update every 2 months, OBD2 Cat fortnightly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | M | OBD2 Cat |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 56 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Zhongshan Auto Electronics Technology Co.Ltd. | Roman Tikhonychev |
Customer experience
M
OBD2 Cat
In-app purchases
M
No in-app purchases
OBD2 Cat
No in-app purchases
