Comparison

ChkOBD OBD2 Analyzer vs OBD2 Car Scanner

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

Head to head
About

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.

Highlights
  • View engine values
  • In-app purchase for advanced data
  • Smog Check Assistant
  • VIN Analyzer
  • Error Decoder and Reset
  • Bluetooth adapter compatibility check
Features
Read 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.

About

OBD2 Car Scanner

Diagnose your car's engine and transmission with real-time data, customizable dashboards, and emissions readiness checks. This app connects to your vehicle's OBD2 system via Wi-Fi or Bluetooth for comprehensive maintenance and performance insights.

Highlights
  • Comprehensive diagnostics
  • Customizable dashboard
  • Real-time monitoring
  • Emissions readiness check
  • ECU self-monitoring test
  • HUD mode
Features
Read full description

OBD2 Car Scanner is designed to provide comprehensive diagnostics, real-time data monitoring, and maintenance guidance for your vehicle. It connects to your car’s OBD2 engine management system via Wi-Fi or Bluetooth, offering seamless integration with a range of compatible devices such as ELM327 adapters, Veepeak scanners, and more. OBD2 Car Scanner is the key to unlocking a world of benefits for your vehicle’s maintenance and performance. See how our app can revolutionize your driving experience: Comprehensive Diagnostics: Instantly access detailed information about your car’s engine and transmission, allowing you to quickly troubleshoot any issues and ensure optimal performance. Customizable Dashboard: Personalize your dashboard with custom gauges and graphs, providing you with the data that matters most to you at a glance. Real-Time Monitoring: Stay informed about your vehicle’s health with real-time data from sensors, allowing you to address potential issues before they become serious. Emissions Readiness: Easily determine if your vehicle is ready for emissions testing, saving you time and hassle during inspections. ECU Self-Monitoring Test: Utilize advanced diagnostics to perform self-monitoring tests on your vehicle’s ECU, allowing you to troubleshoot and resolve issues with confidence. Wide Compatibility: Enjoy seamless compatibility with a wide range of vehicles manufactured after 1996, ensuring you can use our app with confidence regardless of your car’s make or model. HUD Mode: Experience unparalleled convenience with our HUD mode, which allows you to project vital data directly onto your windshield for effortless monitoring while you drive. With OBD2 Car Scanner, you’ll have all the tools you need to take control of your vehicle’s maintenance and performance, saving you time, money, and frustration in the long run. Unlock your car’s full potential today! OBD2 Car Scanner is an application that allows car owners to read and diagnose their vehicle’s internal systems using the OBD 2 (On-Board Diagnostic) system. The app is compatible with a variety of OBD 2 scanners, including FixD OBD, Bluedriver OBD, Torque OBD, Torque Pro, Veepeak OBD, ELM 327, OBD Doctor, OBD Fusion, and Carly OBD. And all car brands: Citroën, Jaguar, Aston Martin, Hyundai, Bugatti, Kia, Maserati, Bentley, Subaru, Renault, Lamborghini, Mitsubishi, Porsche, Chevrolet, Fiat, Volvo, Mini, GMC, Smart, Tesla, Honda, Audi, Ford, Land Rover, Peugeot, Buick, Lexus, Alfa Romeo, Infiniti, Rolls-Royce, Skoda, Mazda, Volkswagen, Nissan, Jeep, McLaren, BMW, Mercedes-Benz, Toyota, Acura, Suzuki, Chrysler, Opel, Lotus, Daihatsu, Pagani, Seat, SsangYong, Lancia, Dacia, MG, Maybach, Ram, Hummer, Genesis, Alpine, Aston Martin, .. and many more You can upgrade to Premium with a one-time payment or purchase subscription options: - a monthly subscription (which comes with a 3-day free trial). - a weekly subscription – Payment will be charged to iTunes Account at confirmation of purchase. – Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. – Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. – Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. – Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Privacy Policy: https://digitalcarkeyllc.com/privacy-policy Terms of Service: https://digitalcarkeyllc.com/terms-of-service

Screenshots

ChkOBD OBD2 Analyzer4 screens
OBD2 Car Scanner4 screens

Verdict

The call

The clearest difference is rating: OBD2 Car Scanner at 3.8 against ChkOBD OBD2 Analyzer's 3.0. OBD2 Car Scanner also leads on ratings volume (1.5K vs 4). ChkOBD OBD2 Analyzer's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price, update cadence, in-app purchases and monetization model 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. ChkOBD OBD2 Analyzer sells 4 in-app purchases, starting at $4.99 per month and OBD2 Car Scanner sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

OBD2 Car Scanner holds the better App Store score, 3.8 against 3.0. That said, the two scores are not equally well evidenced: OBD2 Car Scanner has 1.5K ratings behind it against 4, so its average is the more settled of the two.

UpkeepUpdate frequency

ChkOBD OBD2 Analyzer ships an update every 3 months, OBD2 Car Scanner every 2 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard4 real differences · 6 level
ChkOBD OBD2 Analyzer versus OBD2 Car Scanner: the parameters behind the verdict, then further details
ParameterChkOBD OBD2 AnalyzerOBD2 Car Scanner
PriceFreeFree
Rating3.0 (4 ratings)3.8 (1.5K ratings) — better
Positive reviews—3.6% of reviews
Number of ratings41.5K — better
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size63 MB59 MB
Age rating4+4+
DeveloperCheck On-Board Diagnostics LLCDigital Car Key LLC

Customer experience

ChkOBD OBD2 Analyzer

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

OBD2 Car Scanner

All ratings1,523 ratings
Positive70.3%
Neutral3.3%
Negative26.3%
Written reviews139 reviews
Positive3.6%
Neutral0.0%
Negative96.4%

Bugs and requests

ChkOBD OBD2 Analyzer

Not enough reviews yet to summarise bugs or requests.

OBD2 Car Scanner

Reported bugs

3 issues
  • App crashes frequently
  • Unable to register device
  • Inaccurate diagnostic readings

Requested features

2 requests
  • Free trial option
  • Compatibility with more vehicle models

In-app purchases

4 purchases

ChkOBD OBD2 Analyzer

Subscriptions1
  • Smog Check Assistant$4.991 Month
One-time3
  • VIN Analyzer$1.99
  • Error Analyzer$2.99
  • Advance Engine Values$4.99
3 purchases

OBD2 Car Scanner

Subscriptions2
  • Weekly Premium Subscription$4.997 Days
  • Monthly Premium Subscription3 Days trial$11.991 Month
One-time1
  • Lifetime Premium$49.99

Questions

Is ChkOBD OBD2 Analyzer free?
ChkOBD OBD2 Analyzer is free to download, with in-app purchases available.
Is OBD2 Car Scanner free?
OBD2 Car Scanner is free to download, with in-app purchases available.
Which has better reviews, ChkOBD OBD2 Analyzer or OBD2 Car Scanner?
OBD2 Car Scanner is rated higher. ChkOBD OBD2 Analyzer averages 3.0 out of 5 from 4 ratings, while OBD2 Car Scanner averages 3.8 from 1.5K ratings.
Do ChkOBD OBD2 Analyzer or OBD2 Car Scanner have ads?
OBD2 Car Scanner shows ads; ChkOBD OBD2 Analyzer does not.
Which is updated more often, ChkOBD OBD2 Analyzer or OBD2 Car Scanner?
ChkOBD OBD2 Analyzer ships an update every 3 months, and OBD2 Car Scanner every 2 months. Most recently, ChkOBD OBD2 Analyzer was updated on November 3, 2026 and OBD2 Car Scanner on November 4, 2026.

Other comparisons