Comparison

Carista OBD2 vs DFirstCoder

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

Head to head
About

Carista OBD2

This app acts as a DIY car mechanic, allowing you to customize features, diagnose warning lights, monitor live data, and perform maintenance. Save time and money by handling common car tasks yourself.

Highlights
  • Customize car behavior and unlock hidden features
  • Diagnose and reset dashboard warning lights
  • Monitor real-time vehicle parameters
  • Perform simple DIY car maintenance procedures
  • Access advanced electronic diagnostics
Features
Read full description

Carista App is a mobile DIY car mechanic in the palm of your hands - code features, diagnose warning lights, monitor live data, and service your car. Save time and money from visits to the workshop with Carista. Customize your car's behavior, unlock hidden features, diagnose dashboard warning lights, monitor real-time parameters, and perform simple DIY procedures quickly and easily. Advanced app settings available for certain Acura, Audi, BMW, Buick, Cadillac, Chevrolet, Cupra, Dacia, Ford, Gemini, GMC, Holden, Honda, Hyundai, Infiniti, Jaguar, Kia, Land Rover, Lexus, Lincoln, MAN, Mazda, Mini, Nissan, Opel/Vauxhall, Pontiac, Renault, Saab, Scion, Seat, Skoda, Toyota, Volkswagen and Volvo models. THE ALL-IN-ONE CAR TOOL -Customize your car's behavior: unlock hidden features, including SFD & SFD2-protected ones, and tailor your car to your preferences. -Diagnose and Reset dashboard warning lights: quickly identify and resolve issues before they escalate into costly repairs. -Monitor real-time parameters: stay informed about your car's health and performance with live data readings. -Perform simple DIY procedures: save on routine maintenance and avoid lengthy workshop visits. SUPPORTED VEHICLES Acura, Audi, BMW, Buick, Cadillac, Chevrolet, Dacia, Ford, GMC, Holden, Honda, Infiniti, Jaguar, Land Rover, Lexus, Lincoln, Mazda, MINI, Nissan, Opel/Vauxhall, Renault, Scion, SEAT, Škoda, Toyota, Volkswagen, and Volvo. Check if your car is supported here: https://carista.com/apps/supported-cars WHY THE CARISTA APP? - A wide range of car brands supported. - User-friendly and simple: plug the scanner, switch Bluetooth on, press "Connect", see what your car is capable of. - Brilliant customer service. - Frequent updates: new features and brands. -Savings progress tracker: monitor your savings and unlock exclusive offers. HARDWARE Experience the full potential of the Carista App by pairing it with the Carista EVO Scanner (and Carista OBD Scanner-white one-, not compatible with Ford brands and SFD & SFD2-protected 2020+ VAG cars). While Carista App can also be used with other compatible OBD2 adapters such as OBDLink CX, OBDLink MX Bluetooth or LX adapters, Kiwi3 adapter, or a genuine Bluetooth ELM327 v1.4 (ensuring it's not fake or defective). Discover more at: https://carista.com/products/carista-evo-obd-scanner PRICING All paid features are available with an in-app purchase of our Pro functionality: an auto-renewable subscription at $59.99 USD/year or $19.99 USD/month. Price may vary based on currency and region. KEY FEATURES (Exact feature availability depends on your vehicle). *CUSTOMIZATIONS Personalization of comfort & convenience features of the car. More than 300 hidden features per brand. -Gauge needle sweep at startup -Start screen logo -Virtual instrument cluster theme -Lights: DRL, coming/leaving-home -Throttle response behavior and more powerful features to enhance your experience! *ADVANCED DIAGNOSTICS Perform dealer-level electronic diagnostics (fault code checking and resetting) of all modules in the vehicle, including ABS, airbag, and other manufacturer-specific systems. *SERVICE -Electronic parking brake (EPB) retraction tool -Service reset -Tire pressure sensors (TPMS) -Diesel Particulate Filter (DPF) regeneration -Battery registration And other helpful tools. *LIVE DATA -Launch control count -Mileage information -Airbag crashes count -Service interval info -Engine Turbo -Apple CarPlay support: view basic OBD2 live data on your car's screen while driving And others to keep your car running smoothly and efficiently. *For 2005/2008+ vehicles For all cars with OBD port: Basic OBD Diagnostics Basic OBD2 Live Data Emissions Test Service tools Information and help: https://carista.com Terms of Use and Privacy Policy: https://carista.com/policies/privacy-policy

About

DFirstCoder

This app provides comprehensive vehicle diagnostics and customization for car owners. It offers one-click app features for easy operation, Bluetooth connectivity, and the ability to read/clear trouble codes, perform smog checks, and view live data. It supports a wide range of vehicle models.

Highlights
  • One-click apps for easy operation
  • Comprehensive diagnostic features
  • Bluetooth wireless connectivity
  • Read and clear trouble codes
  • Smog check functionality
  • Live data display
  • Supports VAG, BMW, Mercedes-Benz models
Features
Read full description

DFirstCoder is an equipped with one-click apps feature professional OBDII Scanner App, designed for vehicle users who want to go beyond straightforward diagnostics. It includes comprehensive diagnostic features and customize numerous features of your vehicles with one-click, friendly to use even for beginners. Features: 1.2 in 1 OBDII coder. In addition to comprehensive diagnostic, one-click apps eliminate the need for tedious operation steps, making them easy to understand and operate, even for beginners. 2.Hot update. Updating the features or fixing bugs immediately without needing to update the app, it can respond to users needs and resolve functionality issue quickly. 3.Bluetooth connectivity, DFirstCoder's device supports wireless connection to your phone or tablet , and communicate with your vehicles rapidly. 4.Read & Clear codes, read the trouble codes of your vehicle and clear it. 5.Smog check. 6.MIL status. 7.Live data. 8.Freeze frame. 9.Mode 6 10.Covering a wide range of models, VAG Group, BMW Group, Mercedes-Benz, etc. are available. About DFirstCoder Information ———————————————————————————————————————————————————————————————————————————————————— DFirstCoder is an app to adapt DFirst device, owner of Shenzhen QIXIN Technology Co., LTD. It’s equipped with one-click apps and comprehensive diagnostic features. The app is free to download for user, and some of functions are free to use (e.g. clear temporary trouble codes,date-time synchronization and host reboot etc.). For more details, welcome to follow us, Website:www.dfirstcoder.com Facebook:https://www.facebook.com/qixinglobal Email: support@dfirstcoder.com Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Carista OBD24 screens
DFirstCoder3 screens

Verdict

The call

The clearest difference is ads: DFirstCoder at none against Carista OBD2's shown. DFirstCoder also leads on review sentiment (67% vs 34%) and rating (4.8 vs 4.6). Carista OBD2's advantage is ratings volume (4.1K vs 5) and chart position (#187 vs unranked). 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. Carista OBD2 sells 5 in-app purchases, starting at $19.99 per month and DFirstCoder sells 8 in-app purchases, starting at $108.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

DFirstCoder holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Carista OBD2 has 4.1K ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 34% of Carista OBD2's written reviews are positive against 67% of DFirstCoder's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 23, 2026 and September 6, 2026 respectively.

Scorecard6 real differences · 5 level
Carista OBD2 versus DFirstCoder: the parameters behind the verdict, then further details
ParameterCarista OBD2DFirstCoder
PriceFreeFree
Rating4.6 (4.1K ratings)4.8 (5 ratings) — better
Positive reviews34.2% of reviews66.7% of reviews — better
Number of ratings4.1K — better5
Update frequencyEvery 3 weeksEvery 3 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#187 — better—
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.413.0 — better
Further details — not scored
Size132 MB94 MB
Age rating17+17+
DeveloperPrizmosShenzhen QiXin Technology Co., Ltd.

Customer experience

Carista OBD2

All ratings4,097 ratings
Positive89.4%
Neutral2.3%
Negative8.3%
Written reviews813 reviews
Positive34.2%
Neutral9.6%
Negative56.2%

DFirstCoder

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Bugs and requests

Carista OBD2

Reported bugs

5 issues
  • App crashes and freezes
  • Subscription issues and billing problems
  • Incompatibility with certain OBD2 adapters
  • Customization features not working as expected
  • Inaccurate fault code detection

Requested features

5 requests
  • Support for more vehicle makes and models
  • Offline diagnostics and customization
  • Ability to save customization settings
  • More detailed error code information
  • Improved user interface and navigation

DFirstCoder

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Carista OBD2

Subscriptions4
  • Pro$19.991 Month
  • 1 month Pro4 variants$19.991 Month
  • 3 month Pro2 variants$29.993 Months
Show 1 more
  • Pro5 variants$59.991 Year
One-time1
  • One-Time Diagnostic & Reset$9.99
8 purchases

DFirstCoder

Subscriptions2
  • Pro Plan Subscription$108.991 Year
  • Pro Plan Subscription (Family)$158.991 Year
One-time6
  • 350 QD$4.99
  • 700 QD$9.95
  • 1400 QD$19.49
Show 3 more
  • 3500 QD$49.99
  • 7000 QD$96.99
  • 10500 QD$145.99

Questions

Is Carista OBD2 free?
Carista OBD2 is free to download, with in-app purchases available.
Is DFirstCoder free?
DFirstCoder is free to download, with in-app purchases available.
Which has better reviews, Carista OBD2 or DFirstCoder?
DFirstCoder is rated higher. Carista OBD2 averages 4.6 out of 5 from 4.1K ratings, while DFirstCoder averages 4.8 from 5 ratings.
Do Carista OBD2 or DFirstCoder have ads?
Carista OBD2 shows ads; DFirstCoder does not.
Which is updated more often, Carista OBD2 or DFirstCoder?
Carista OBD2 ships an update every 3 weeks, and DFirstCoder every 3 weeks. Most recently, Carista OBD2 was updated on September 23, 2026 and DFirstCoder on September 6, 2026.

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