Comparison

ChkOBD OBD2 Analyzer vs OBD Quest

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

OBD Quest

Decode and understand car diagnostic trouble codes with this comprehensive interpreter. It provides detailed insights into fault codes, potential causes, and repair recommendations, complementing your existing OBD2 scanning tools. Access a vast database of codes across multiple languages and car brands to diagnose issues with confidence.

Highlights
  • Interpretation of over 85,000 OBD2 codes
  • Multilingual support (English, French, Italian, German, Portuguese, Spanish)
  • Extensive coverage across auto makes and brands
  • Detailed insights for each code search
  • Unlimited code searches
  • AI-powered code interpretation
Features
Read full description

Unlock the ultimate power of OBD2 code interpretation with OBDQuest, your comprehensive solution for decoding, understanding and diagnosing car issues. Whether you're looking up a specific DTC fault code definition, or utilizing an OBD2 car scanner, OBDQuest will be your work companion you ever needed to provide unmatched insights into each individual fault code. Don’t get confused, this simple yet innovative application exploiting the power of AI along with comprehensive OBDii SAE/ISO databases is complementing your daily scanning tools below: obd2 scanner, torque obd2, bluedriver obd2 scan tool, car scanner, car scanner elm obd2, carista, obd fusion, forscan, obdlink, obd11, obdeleven, bimmerlink, veepeak, dash command, elm obd2, carly obd2 car scanner, JScan, repair solutions 2, torque pro, bootmod3, FIXD OBD2 Scanner, autocodes, DtcFix, DTCs Fix, obd jscan, OBDocker, torque lite, ScanMaster, car scanner, Dr. Prius, Carly, HobDrive etc. If you use any of those tools already, keep on using them along with OBDQuest to get more insights of the fault code and ease your car diagnostics. Key Features: 1. Interpretation of over 85,000 OBD2 codes 2. Multilingual support in English, French, Italian, German, Portuguese, and Spanish 3. Extensive coverage across various auto makes and brands 4. Detailed insights for each code search, covering potential symptoms, likely causes, primary components affected, recommended fixes, estimated repair costs, and risk assessment. 5. Unlimited code searches, empowering you to tackle any issue with confidence. OBDQuest isn't just another OBD2 app; it's your trusted companion for navigating the complexities of car diagnostics. Don't let trouble codes hold you back; harness the power of OBDQuest and drive with confidence. EULA - End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy : https://obdquest.com/privacy-policy/

Screenshots

ChkOBD OBD2 Analyzer4 screens
OBD Quest4 screens

Verdict

The call

The clearest difference is rating: OBD Quest at 5.0 against ChkOBD OBD2 Analyzer's 3.0. OBD Quest also leads on update cadence (every 3 weeks vs every 3 months). ChkOBD OBD2 Analyzer's advantage is ads (none vs shown) and ratings volume (4 vs 1). On price, in-app purchases, monetization model 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

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 OBD Quest sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

OBD Quest holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

UpkeepUpdate frequency

ChkOBD OBD2 Analyzer ships an update every 3 months, OBD Quest every 3 weeks. The most recent releases landed on October 13, 2026 and October 19, 2026 respectively.

Scorecard4 real differences · 5 level
ChkOBD OBD2 Analyzer versus OBD Quest: the parameters behind the verdict, then further details
ParameterChkOBD OBD2 AnalyzerOBD Quest
PriceFreeFree
Rating3.0 (4 ratings)5.0 (1 ratings) — better
Number of ratings4 — better1
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better14.0.0
Further details — not scored
Size63 MB54 MB
Age rating4+4+
DeveloperCheck On-Board Diagnostics LLCShop Booster Ltd

Customer experience

ChkOBD OBD2 Analyzer

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

OBD Quest

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

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

OBD Quest

Subscriptions2
  • Monthly Pro Plan$9.991 Month
  • Yearly Pro Plan$99.991 Year
One-time1
  • Pro Plan for 3 days only$0.99

Questions

Is ChkOBD OBD2 Analyzer free?
ChkOBD OBD2 Analyzer is free to download, with in-app purchases available.
Is OBD Quest free?
OBD Quest is free to download, with in-app purchases available.
Which has better reviews, ChkOBD OBD2 Analyzer or OBD Quest?
OBD Quest is rated higher. ChkOBD OBD2 Analyzer averages 3.0 out of 5 from 4 ratings, while OBD Quest averages 5.0 from 1 ratings.
Do ChkOBD OBD2 Analyzer or OBD Quest have ads?
OBD Quest shows ads; ChkOBD OBD2 Analyzer does not.
Which is updated more often, ChkOBD OBD2 Analyzer or OBD Quest?
ChkOBD OBD2 Analyzer ships an update every 3 months, and OBD Quest every 3 weeks. Most recently, ChkOBD OBD2 Analyzer was updated on October 13, 2026 and OBD Quest on October 19, 2026.

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