Comparison

ezOBD vs ChkOBD OBD2 Analyzer

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

Head to head
About

ezOBD

Access detailed information about your car's health and performance. Monitor real-time engine parameters, fuel consumption, and diagnostic trouble codes. Features a customizable dashboard and graphing capabilities, with VIN decoding and emission test readiness checks.

Highlights
  • Real-time dashboard display
  • Customizable gauges
  • Real-time graphing
  • Read and clear DTC codes
  • Monitor fuel consumption
  • VIN decoder
  • Emission test readiness
Features
Read full description

Get access information from the computer(s) in your car about its health and performance Important features and improvements will be based on feedback from our fast growing community Works with Wi-Fi or Bluetooth BLE (4.0) VIN decoder reads car info without having to type in Context sensitive help system Real-time dashboard display with fully customizable gauges Real-time user defined graphing of multiple signals Supports all standard PIDs Monitor fuel consumption while you drive and save money on gas Generate and email logs and diagnostic/repair reports Real-time engine & vehicle parameters Read and clear DTC engine codes Multiple ECU support Free unlimited updates Ad-free Emission test: make sure if your car will pass or fail an emission test View RPMs, coolant temperature, oxygen sensor readings All the OBD II protocols are supported Very simple to use! You don't even have to select your car model Works with inexpensive Bluetooth BLE or Wi-Fi OBD2 devices In graphs you can send a png file of graph along with the csv file We are working hard to enhance the product and will be releasing frequent updates. If you have feedback or questions, please reach out to us directly at support@ezobd.com

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.

Screenshots

ezOBD3 screens
ChkOBD OBD2 Analyzer4 screens

Verdict

The call

The clearest difference is in-app purchases: ezOBD at none against ChkOBD OBD2 Analyzer's 4. ezOBD also leads on rating (3.3 vs 3.0) and update cadence (monthly vs every 3 months). On price, ratings volume, 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

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. ezOBD asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ezOBD holds the better App Store score, 3.3 against 3.0. Both are backed by a comparable volume of ratings — 6 and 4 respectively.

UpkeepUpdate frequency

ezOBD ships an update monthly, ChkOBD OBD2 Analyzer every 3 months. The most recent releases landed on October 25, 2026 and October 13, 2026 respectively.

Scorecard5 real differences · 5 level
ezOBD versus ChkOBD OBD2 Analyzer: the parameters behind the verdict, then further details
ParameterezOBDChkOBD OBD2 Analyzer
PriceFreeFree
Rating3.3 (6 ratings) — better3.0 (4 ratings)
Positive reviews75.0% of reviews—
Number of ratings6 — better4
Update frequencyMonthly — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.1 — better13.0
Further details — not scored
Size4 MB63 MB
Age rating4+4+
DeveloperUP & RUNNINGCheck On-Board Diagnostics LLC

Customer experience

ezOBD

All ratings6 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

ChkOBD OBD2 Analyzer

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

In-app purchases

None

ezOBD

No 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

Questions

Is ezOBD free?
ezOBD is free to download, with no in-app purchases.
Is ChkOBD OBD2 Analyzer free?
ChkOBD OBD2 Analyzer is free to download, with in-app purchases available.
Which has better reviews, ezOBD or ChkOBD OBD2 Analyzer?
ezOBD is rated higher. ezOBD averages 3.3 out of 5 from 6 ratings, while ChkOBD OBD2 Analyzer averages 3.0 from 4 ratings.
Do ezOBD or ChkOBD OBD2 Analyzer have ads?
Neither ezOBD nor ChkOBD OBD2 Analyzer shows ads.
Which is updated more often, ezOBD or ChkOBD OBD2 Analyzer?
ezOBD ships an update monthly, and ChkOBD OBD2 Analyzer every 3 months. Most recently, ezOBD was updated on October 25, 2026 and ChkOBD OBD2 Analyzer on October 13, 2026.

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