iCarScan vs ChkOBD OBD2 Analyzer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iCarScan
Access professional-level automotive diagnostic functions, including reading and clearing fault codes, viewing live data, and performing special tests. Supports a wide range of vehicle manufacturers with automatic VIN recognition and one-key diagnosis. Generates detailed diagnostic reports for informed maintenance.
- OE-level professional functions
- Full OBD II diagnosis
- Support for 39+ manufacturers
- Automatic VIN reading
- One-key diagnosis
- Fault code interpretation
- Diagnostic report generation
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1. Profession functions refer to OE level functions, such as read/clear code, data flow diagram, read ECU, drive test, bidirectional special functions, etc. 2. Support full-function OBD II diagnosis, read data flow, freeze frame read IM/real-time data, read/clear fault code, vehicle on-board monitoring/computer system control operation and read vehicle information. 3. Support vehicle maintenance light return to normal. 4. Select any vehicle diagnostic software, covering up to 39 major automobile manufacturers. 5. Support automatic VIN reading and one-key diagnosis. 6. Clear interpretation of fault codes and generate professional diagnostic reports.
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
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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: iCarScan at 3.8 against ChkOBD OBD2 Analyzer's 3.0. iCarScan also leads on in-app purchases (none vs 4) and ratings volume (14 vs 4). On price, update cadence, ads and device support 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. iCarScan asks for nothing beyond the download.
iCarScan holds the better App Store score, 3.8 against 3.0. Both are backed by a comparable volume of ratings — 14 and 4 respectively.
iCarScan ships an update every 5 months, ChkOBD OBD2 Analyzer every 3 months. The most recent releases landed on October 21, 2026 and October 13, 2026 respectively.
| Parameter | iCarScan | ChkOBD OBD2 Analyzer |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (14 ratings) — better | 3.0 (4 ratings) |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 14 — better | 4 |
| Update frequency | Every 5 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 324 MB | 63 MB |
| Age rating | 17+ | 4+ |
| Developer | THINKCAR INC | Check On-Board Diagnostics LLC |
Customer experience
iCarScan
ChkOBD OBD2 Analyzer
In-app purchases
iCarScan
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 iCarScan free?
Is ChkOBD OBD2 Analyzer free?
Which has better reviews, iCarScan or ChkOBD OBD2 Analyzer?
Do iCarScan or ChkOBD OBD2 Analyzer have ads?
Which is updated more often, iCarScan or ChkOBD OBD2 Analyzer?
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