Comparison

BAS2 RRC 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

BAS2 RRC

Control an engine diagnostic tool for CAN-based cars. Read and clear fault codes, view live engine data graphically or numerically, and perform ECU service tests. Access ECU information and more through your iPhone or iPad.

Highlights
  • Fault code reading and clearing
  • Engine live data (numerical/graphical)
  • ECU service tests
  • ECU information
  • Bluetooth Smart control
Features
Read full description

This IOS Application is to control the BAS2 RRC tool as an engine diagnostic interface for late model 11 and 29 bits CAN based cars. The diagnostic interface boasts many features including fault code reading and clearing, engine live data screens in numerical or ghrapical views, ECU service tests, provides ECU info and more... The BAS2 RRC app allows the use of a Bluetooth Smart enabled tool named BAS2 RRC through an iPhone or iPad.

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

BAS2 RRC1 screens
ChkOBD OBD2 Analyzer4 screens

Verdict

The call

The clearest difference is in-app purchases: BAS2 RRC at none against ChkOBD OBD2 Analyzer's 4. BAS2 RRC also leads on iOS requirement (9.0 vs 13.0). ChkOBD OBD2 Analyzer's advantage is update cadence (every 3 months vs every 47 months). On price, 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. BAS2 RRC asks for nothing beyond the download.

UpkeepUpdate frequency

BAS2 RRC ships an update every 47 months, ChkOBD OBD2 Analyzer every 3 months. The most recent releases landed on September 19, 2026 and June 5, 2026 respectively.

Scorecard4 real differences · 6 level
BAS2 RRC versus ChkOBD OBD2 Analyzer: the parameters behind the verdict, then further details
ParameterBAS2 RRCChkOBD OBD2 Analyzer
PriceFreeFree
Rating—3.0 (4 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings—4 — better
Update frequencyEvery 47 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better13.0
Further details — not scored
Size25 MB63 MB
Age rating4+4+
DeveloperBell Auto Services LtdCheck On-Board Diagnostics LLC

Customer experience

BAS2 RRC

Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

ChkOBD OBD2 Analyzer

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

In-app purchases

None

BAS2 RRC

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 BAS2 RRC free?
BAS2 RRC 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.
Do BAS2 RRC or ChkOBD OBD2 Analyzer have ads?
Neither BAS2 RRC nor ChkOBD OBD2 Analyzer shows ads.
Which is updated more often, BAS2 RRC or ChkOBD OBD2 Analyzer?
BAS2 RRC ships an update every 47 months, and ChkOBD OBD2 Analyzer every 3 months. Most recently, BAS2 RRC was updated on September 19, 2026 and ChkOBD OBD2 Analyzer on June 5, 2026.

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