Comparison

OBD2 Scanner ELM327 vs DFirstCoder

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

Head to head
About

OBD2 Scanner ELM327

This app provides comprehensive OBD scanning for vehicles, allowing users to read and clear fault codes from various ECUs, monitor live sensor data, and perform special functions like DPF regeneration and injector coding. It supports over 100 vehicle makes and offers detailed reports and diagnostic assistance.

Highlights
  • Read and delete fault codes from any ECU
  • Monitor over 200 live sensor data points
  • Perform special OBD functions
  • Generate shareable PDF diagnostic reports
  • Check SMOG status for emission tests
  • Reset service/oil lights
  • Track 0-60 and 0-100 timing
Features
Read full description

GaragePro is the perfect OBD Scanning app for automotive enthusiasts, repair shops, and DIYers. Covering 100+ vehicle makes, GaragePro offers you comprehensive OBD coverage such as reading fault codes from all ECUs- Engine, Airbag, ABS, BCM etc., as well as Special functions such as Injector coding, DPF regeneration, Throttle Reset, ABS (Brake) bleeding, Steering angle reset etc. Key Features: OBD2 Scanning: Read and delete fault codes from any module- Engine, ABS, SRS, EPS, BCM and more. GaragePro can read OBD codes from 100s of ECUs across different makes, covering 100,000+ unique DTCs. Live Data Monitoring: Read over 200 live data points from vehicle sensors in real-time, including RPM, speed, coolant temperature, fuel trim etc. as well as vehicle specific live sensor data points. GaragePro OBD2 Scanner also has intuitive graphs and customizable displays, that let your visualize changes in your OBD2 data. You can also export PID readings to Excel or PDF for detailed analyses. Multi-Mode Coverage: Unlock more OBD2 modes than other apps. GaragePro offers access to a plethora of modes/service IDs such as modes 01, 02, 03, 04, 06, 07, 09, 0A, as well as vehicle specific modes for enhanced OBD coverage. Special OBD functions like Injector coding, DPF regeneration, Throttle Reset, ABS (Brake) bleeding, Steering angle reset, Power balance, Fuel Density Reset, Learning Value Reset, Actuation Tests, AC Control Module Reset, Indicator light reset, Brake Pedal Position Sensor learning, Light and Door customizations, etc. Check the app for the full list applicable to your car. PDF report and Support: Get a shareable PDF with code descriptions when scanning a vehicle and share it with your technicians, friends, customers or store it for future comparisons. GaragePro also offers email and chat support to its customers. Smog checks through OBD: Be ready for your vehicle's emission tests by checking SMOG status in the app. Service/Oil reset: GaragePro OBD2 Scanner includes both- Auto and manual methods to reset the Service/Oil lights. Check Engine Light/Dashboard Lights Assistance: Compared to other apps, GaragePro is able to cover not just MIL, but also ABS, airbag, oil level, steering and other warning lights. OBD Freeze Frame data: Read OBD freeze frame data to understand your sensors' state when OBD codes were generated. Track mode: Measure your 0-60, 0-100 timing and see how well you do on the track. Vehicle Compatibility: The GaragePro OBD2 Scanner app works with any vehicle that's compliant with the OBD2 standard (introduced in the USA in 1996). It reads data from 100s of ECUs in cars & bikes, including Engine, ABS, Airbags (SRS), EPS, BCM, Traction Control, Transmission, HVAC, Instrument cluster & more. It is compatible with all American, Japanese, Korean, German, and other European car & bike makes, including but not limited to GM, Toyota, Ford, Lincoln, Buick, Chevrolet , Opel, Nissan, Infinity, Renault, Mercedes, Suzuki, Lexus, Triumph, Hyundai, Kia, Mazda, Honda, Mahindra, Tata, MG, Volkswagen, Audi, Skoda, Seat, BMW and more. For motorcycles, you will need a connecting cable that connects the 16-pin OBD scanner with the bike's OBD port. Bike diagnostics include DTC reading & deletion, live data stream & freeze frame data. OBD Scanner Compatibility: GaragePro OBD2 Scanner works with any Bluetooth OBD Scanner, including most elm327 based OBD scanners. It also works with popular OBD scanners like Vlink, OBDLink, Carista, Veepeak, Viecar, Kiwi and more. GaragePro also has its own OBD2 Scanner that works seamlessly with the app. Please note: The availability of sensor data depends on your vehicle's ECUs. The app can only display information that is provided by your car's systems. Whether you're a car enthusiast seeking performance gains, a mechanic looking to tackle repairs, or a car owner committed to staying informed, GaragePro OBD2 Scanner is the perfect OBD2 diagnostic tool for you. Email support: fix@carpm.in

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

OBD2 Scanner ELM3274 screens
DFirstCoder3 screens

Verdict

The call

The clearest difference is rating: DFirstCoder at 4.8 against OBD2 Scanner ELM327's 4.3. DFirstCoder also leads on review sentiment (67% vs 46%). OBD2 Scanner ELM327's advantage is ratings volume (19 vs 5). On price, update cadence, ads and in-app purchases 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. OBD2 Scanner ELM327 sells 23 in-app purchases, starting at $4.99 per year 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 4.3. Both are backed by a comparable volume of ratings — 19 and 5 respectively. Written reviews point the same way: 46% of OBD2 Scanner ELM327'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 21, 2026 and September 6, 2026 respectively.

Scorecard3 real differences · 7 level
OBD2 Scanner ELM327 versus DFirstCoder: the parameters behind the verdict, then further details
ParameterOBD2 Scanner ELM327DFirstCoder
PriceFreeFree
Rating4.3 (19 ratings)4.8 (5 ratings) — better
Positive reviews46.2% of reviews66.7% of reviews — better
Number of ratings19 — better5
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size65 MB94 MB
Age rating4+17+
DeveloperZymbia Interactive Technologies Private LimitedShenzhen QiXin Technology Co., Ltd.

Customer experience

OBD2 Scanner ELM327

All ratings19 ratings
Positive78.9%
Neutral5.3%
Negative15.8%
Written reviews65 reviews
Positive46.2%
Neutral3.1%
Negative50.8%

DFirstCoder

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

Bugs and requests

OBD2 Scanner ELM327

Reported bugs

21 issues
  • App stops working
  • App does not load past splash screen
  • App is not responding properly
  • App crashes when trying to buy subscription
  • App starts crashing after a few days
Show 16 more
  • License removed after uninstall/reinstall
  • App does not start after downloading
  • Shows false error codes
  • Requires uninstall to connect
  • App closes and won't open
  • Cannot clear codes after paying for subscription
  • Scanning issue (stops at 4%)
  • App hangs at 5% during scan
  • Freezes or gives an error during scan
  • Most GM PIDs not available
  • Live View Advanced PIDs missing
  • Cannot pull or clear codes
  • Not functional after updates
  • Cannot link to iPhone
  • Not working on multiple car models
  • Service reset states not available after payment

Requested features

8 requests
  • DPF REGEN feature
  • Ability to select new vehicle easily
  • Reactivate perpetual license without reinstalling
  • List of approved scanner devices
  • Support for WiFi adapters on iOS
Show 3 more
  • Add Google ID option for iPhone
  • Fix PIDs missing in Live View Advanced
  • Option to store data locally instead of server

DFirstCoder

Not enough reviews yet to summarise bugs or requests.

In-app purchases

23 purchases

OBD2 Scanner ELM327

Subscriptions11
  • AI Scan Summary (Yearly)$4.991 Year
  • Standard - Yearly$9.491 Year
  • Personal Plan$9.991 Year
Show 8 more
  • Lite - Yearly$9.991 Year
  • Standard - Yearly$19.991 Year
  • Advanced - Yearly$23.991 Year
  • Advanced + AI Summary - Yearly$28.991 Year
  • Premium - Yearly$32.991 Year
  • Standard - Yearly$34.991 Year
  • Advanced - Yearly$71.991 Year
  • Advanced - Yearly$99.991 Year
One-time12
  • Lite - Perpetual$17.99
  • Lite - Perpetual$21.99
  • Standard - Perpetual$34.99
Show 9 more
  • Standard - Perpetual$37.99
  • Standard - Perpetual$54.99
  • Lifetime Subsciption$69.99
  • Standard - Perpetual$69.99
  • Advanced - Perpetual2 variants$99.99
  • Advanced - Perpetual$109.99
  • Advanced - Perpetual$129.99
  • Advanced - Perpetual$159.99
  • Advanced - Perpetual$199.99
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 OBD2 Scanner ELM327 free?
OBD2 Scanner ELM327 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, OBD2 Scanner ELM327 or DFirstCoder?
DFirstCoder is rated higher. OBD2 Scanner ELM327 averages 4.3 out of 5 from 19 ratings, while DFirstCoder averages 4.8 from 5 ratings.
Do OBD2 Scanner ELM327 or DFirstCoder have ads?
Neither OBD2 Scanner ELM327 nor DFirstCoder shows ads.
Which is updated more often, OBD2 Scanner ELM327 or DFirstCoder?
OBD2 Scanner ELM327 ships an update every 3 weeks, and DFirstCoder every 3 weeks. Most recently, OBD2 Scanner ELM327 was updated on September 21, 2026 and DFirstCoder on September 6, 2026.

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