Comparison

OBD2 Expert vs OBD Mate

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

OBD2 Expert

Diagnose and monitor your vehicle's health by connecting an OBD2 adapter. View sensor data, read and reset trouble codes, and analyze diagnostic information. Developers can use it as a hardware simulator or protocol bridge.

Highlights
  • Vehicle diagnostics and monitoring
  • Read and reset diagnostic trouble codes (DTC)
  • View current sensor data
  • Analyze Mode 6 diagnostics
  • Load vehicle status files for testing
  • Share vehicle status data
  • BLE/WiFi OBD2 ScanTool simulator for developers
  • OBD2 protocol communication bridge
Features
Read full description

OBD2-Expert is the new competent solution for vehicle diagnostics and monitoring. === The Highlights === A) Reveal vehicle problems before visiting the garage. B) Load vehicle status files and try the functionality of the app. C) Share your vehicle status with others and discuss solutions. D) For developers: Use this app as BTLE-OBD2-ScanTool instead of an expensive hardware simulator. E) For learning: Use this app as BTLE/WiFi Bridge and inspect the protocol communication. === The Details === A) Reveal vehicle problems before visiting the garage. Connect an OBD2 WiFi or BLE adapter to your vehicle and select it from the app. View the current sensor data. Load the diagnostic trouble codes (DTC) and inspect the freeze frame data from when the error occured. The component monitoring can tell you about potential problems by showing contiguous and non-contiguous monitors as well as a detailed analysis of mode 6 diagnostics (if supported by your vehicle). If you can fix your vehicle yourself, reset the saved DTC. B) Load vehicle status files and try the functionality of the app. Tired of buying promising apps that don't work? Try this app for free by loading a vehicle status file instead of connecting it to an adapter. C) Share your vehicle status with others and discuss solutions. With this app, you can capture the state of your vehicle including all DTCs and sensor data – either for later diagnostics or to share with other people. D) For developers: Use this app as BLE-OBD2-ScanTool instead of an expensive hardware simulator. Are you developing an OBD2-ScanTool and not having access to dozens of vehicles with their protocols? This app can work as a BLE-OBD2-ScanTool adapter, sparing you the cost of a professional hardware simulator. E) For learning: Use this app as BTLE/WiFi Bridge and inspect the protocol communication. If you want to learn about the OBD2 protocol communication, you can use your BTLE dongle and bridge it via WiFi to another OBD2 app (this requires an iPad Pro where you can run two apps side-by-side or another physical phone or tablet). === Supported Bluetooth hardware === Please note that this App will _not_ work with Bluetooth 2.x or 3.x adapters! This is a hardware limitation which can't be changed. Many very cheap BTLE OBD2 adapters are not Bluetooth 4.0, so please be aware of that. === Closing Note === OBD2-Expert is not a oneshot project. We want to support and continually develop this app. Hold your breath for exciting coming features. Please use the Support-URL to communicate your feedback to us!

About

OBD Mate

Diagnose vehicle faults and receive driving assistance using your smartphone or tablet. Connect via Bluetooth to read and clear error codes, monitor sensor data, and view custom dashboards for a better driving experience.

Highlights
  • Fault diagnosis
  • Driving assistance
  • Read and clear codes
  • Freeze frame data
  • O2 sensor monitoring
  • Customizable dashboard
Features
Read full description

The OBD assistant is a driving companion that can communicate with the vehicle terminal through Bluetooth using smartphones and tablets to complete functions such as fault diagnosis and driving assistance. It not only has rich and comprehensive vehicle detection and diagnosis functions such as fault code reading and clearing, freeze frames, battery voltage, gearbox, and performance testing, but also has a cool instrument panel and driving assistance functions, making driving more fun.

Screenshots

OBD2 Expert4 screens
OBD Mate4 screens

Verdict

The call

The clearest difference is rating: OBD2 Expert at 4.1 against OBD Mate's 1.8. OBD2 Expert also leads on ratings volume (725 vs 115) and iOS requirement (9.3 vs 13.0). OBD Mate's advantage is in-app purchases (none vs 4). On price, review sentiment, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. OBD2 Expert sells 4 one-off in-app purchases. OBD Mate asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OBD2 Expert holds the better App Store score, 4.1 against 1.8. That said, the two scores are not equally well evidenced: OBD2 Expert has 725 ratings behind it against 115, so its average is the more settled of the two. Written reviews complicate that: 8% of OBD2 Expert's written reviews are positive against 9% of OBD Mate's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

OBD2 Expert ships an update every 2 months, OBD Mate every 5 weeks. Both last shipped on September 24, 2026.

Scorecard5 real differences · 5 level
OBD2 Expert versus OBD Mate: the parameters behind the verdict, then further details
ParameterOBD2 ExpertOBD Mate
PriceFreeFree
Rating4.1 (725 ratings) — better1.8 (115 ratings)
Positive reviews8.0% of reviews9.4% of reviews — better
Number of ratings725 — better115
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.3 — better13.0
Further details — not scored
Size17 MB365 MB
Age rating4+4+
DeveloperMichael LauerAutophix Tech Co., Ltd

Customer experience

OBD2 Expert

All ratings724 ratings
Positive75.1%
Neutral5.0%
Negative19.9%
Written reviews199 reviews
Positive8.0%
Neutral1.5%
Negative90.5%

OBD Mate

All ratings115 ratings
Positive17.4%
Neutral5.2%
Negative77.4%
Written reviews96 reviews
Positive9.4%
Neutral7.3%
Negative83.3%

Bugs and requests

OBD2 Expert

Reported bugs

3 issues
  • Freezes during use
  • Fails to recognize compatible OBD2 adapters
  • Inaccurate vehicle information detection

Requested features

4 requests
  • Add support for more vehicle models
  • Implement live data monitoring
  • Include ability to clear diagnostic codes
  • Provide free trial period to test functionality

OBD Mate

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

OBD2 Expert

One-time4
  • Operation Mode Bridge$0.99
  • Operation Mode ScanTool$2.99
  • Operation Mode Simulator$4.99
Show 1 more
  • All Features$5.99
None

OBD Mate

No in-app purchases

Questions

Is OBD2 Expert free?
OBD2 Expert is free to download, with in-app purchases available.
Is OBD Mate free?
OBD Mate is free to download, with no in-app purchases.
Which has better reviews, OBD2 Expert or OBD Mate?
OBD2 Expert is rated higher. OBD2 Expert averages 4.1 out of 5 from 725 ratings, while OBD Mate averages 1.8 from 115 ratings.
Do OBD2 Expert or OBD Mate have ads?
Neither OBD2 Expert nor OBD Mate shows ads.
Which is updated more often, OBD2 Expert or OBD Mate?
OBD2 Expert ships an update every 2 months, and OBD Mate every 5 weeks. Most recently, OBD2 Expert was updated on September 24, 2026 and OBD Mate on September 24, 2026.

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