OBD Mate vs ChkOBD OBD2 Analyzer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Fault diagnosis
- Driving assistance
- Read and clear codes
- Freeze frame data
- O2 sensor monitoring
- Customizable dashboard
Read full descriptionHide 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.
ChkOBD OBD2 Analyzer
Connect your iPhone or iPad to your car's engine to view vital data. Access basic engine values for free, with in-app purchases for advanced diagnostics, smog check readiness, VIN analysis, and error decoding.
- View engine values
- In-app purchase for advanced data
- Smog Check Assistant
- VIN Analyzer
- Error Decoder and Reset
- Bluetooth adapter compatibility check
Read full descriptionHide full description
ChkOBD let you connect your iPhone and iPad to your Car and view the most important Engine values in a very intuitive user interface in an appealing user-friendly way. ChkOBD connects wirelessly to an ELM237 enabled OBDII - Bluetooth adapter which is readily available from many 3rd party vendors. From this free application that let you have access to the basic “Engine Values”, you will have In-App purchase to access additional information such as : . Advanced Engine Values, an extended choice of sensors available on your car, that you can select and monitor. The available Engine Value from your car, are all listed in a “grey” mode, so, you will have no surprise of what you will get (or not get !) after the In App purchase . Smog Check Assistant, to know if your car will pass the next Smog Check at the state official station, or the App will let you know what needs to be fixed, before driving there, . VIN Analyzer, will let you know what information is in the “government file” from your car, including date and place of manufacturing, . Error Decoder and Reset, to know what is the current error that is in the Memory of the computer of your car and let you have a way to try to reset this error (Normally, it comes back on, if the cause of the error is not mechanically fixed). This is an error scan that is going through about 4'000 possible errors. Usually all these information will be read from all car that have been sold in the USA after 2005. The fact that these applications are offered from inside a free app, in our side, from this free app, we are able to check before any of your purchase, that your car and your Bluetooth adapter will be 100% compatible with these applications. We are using this technology to try to provide to our customers the best possible satisfaction.
Screenshots
Verdict
The clearest difference is rating: ChkOBD OBD2 Analyzer at 3.0 against OBD Mate's 1.8. OBD Mate's advantage is in-app purchases (none vs 4) and ratings volume (115 vs 4). On price, ads, device support and iOS requirement 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. ChkOBD OBD2 Analyzer sells 4 in-app purchases, starting at $4.99 per month. OBD Mate asks for nothing beyond the download.
ChkOBD OBD2 Analyzer holds the better App Store score, 3.0 against 1.8. That said, the two scores are not equally well evidenced: OBD Mate has 115 ratings behind it against 4, so its average is the more settled of the two.
OBD Mate ships an update every 5 weeks, ChkOBD OBD2 Analyzer every 3 months. The most recent releases landed on September 24, 2026 and June 5, 2026 respectively.
| Parameter | OBD Mate | ChkOBD OBD2 Analyzer |
|---|---|---|
| Price | Free | Free |
| Rating | 1.8 (115 ratings) | 3.0 (4 ratings) — better |
| Positive reviews | 9.4% of reviews | — |
| Number of ratings | 115 — better | 4 |
| Update frequency | Every 5 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 365 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | Autophix Tech Co., Ltd | Check On-Board Diagnostics LLC |
Customer experience
OBD Mate
ChkOBD OBD2 Analyzer
In-app purchases
OBD Mate
No in-app purchases
ChkOBD OBD2 Analyzer
- Smog Check Assistant$4.991 Month
- VIN Analyzer$1.99
- Error Analyzer$2.99
- Advance Engine Values$4.99
Questions
Is OBD Mate free?
Is ChkOBD OBD2 Analyzer free?
Which has better reviews, OBD Mate or ChkOBD OBD2 Analyzer?
Do OBD Mate or ChkOBD OBD2 Analyzer have ads?
Which is updated more often, OBD Mate or ChkOBD OBD2 Analyzer?
Other comparisons















