Comparison

BlueDriver OBD2 Scan Tool vs Car Keys Express

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

Head to head
About

BlueDriver OBD2 Scan Tool

This app turns your smartphone into a powerful OBD2 scan tool. It allows you to read and clear trouble codes, view live data, and generate detailed repair reports for your vehicle. Understand your car's issues and make informed repair decisions.

Highlights
  • Read and clear trouble codes (Check Engine, ABS, etc.)
  • Generate professional-grade Repair Reports
  • Access Mode 6 and smog readiness data
  • View live data with interactive graphing
  • Wireless Bluetooth scanning
  • Likely fixes explained in plain language
Read full description

BlueDriver® transforms your iPhone or iPad into a powerful OBD2 scan tool – trusted by over 1 million drivers, from professional mechanics to DIYers. Paired with the BlueDriver Bluetooth® Sensor (sold separately), it lets you read codes, diagnose issues, and fix your car with confidence—no wires, no guesswork. Whether you're checking a check engine light, running a smog test, or diving into enhanced diagnostics like ABS or transmission codes, BlueDriver gives you the tools you need to understand your vehicle and make smarter repair decisions – with clear, easy-to-understand information. What You Can Do with BlueDriver · Read and clear trouble codes - including check engine, ABS, airbag, transmission, and more · Generate, save, and share professional-grade Repair Reports based on your exact vehicle and trouble code · Access Mode 6 on-board monitoring test results · Check smog readiness and freeze frame data · View live data with multi-PID interactive graphing · Scan your vehicle wirelessly with Bluetooth—no cables required · Choose between metric and imperial settings · Get likely fixes for your vehicle’s issues, explained in plain language Enhanced Diagnostics Coverage · GM, Ford, Chrysler, Toyota, Nissan, Mazda, Mercedes (2005+ models) · Mitsubishi (2008+), Hyundai/Kia (2012+) – available worldwide · BMW/Mini, Honda/Acura, Volkswagen/Audi – available in North America · Subaru – available in the United States What Makes BlueDriver Different? · No subscription required · Backed by a database of millions real-world fixes · Repair Reports are specific to your vehicle’s year, make, and model · Works globally with the BlueDriver Sensor · App is free to install—just pair with the Sensor to start scanning You can even preview a Repair Report without a Sensor by entering your VIN and a trouble code. Account Setup Made Easy You’ll create a BlueDriver account during setup—it’s quick and easy, and gives you secure access to all your scans, reports, and new features across any device. Important Info The BlueDriver Sensor plugs into your vehicle’s data port (found in every car built since 1996). It connects to the app via Bluetooth® to deliver full diagnostic functionality. Sensor sold separately in-app or at www.BlueDriver.com

About

Car Keys Express

Duplicate your car keys from home using your phone's camera. Save money by avoiding dealership prices and get keys cut and shipped to you. Easily pair new keys with a DIY installer for compatible vehicles.

Highlights
  • Duplicate car keys with phone camera
  • Save up to 75% off dealership prices
  • Keys cut and shipped
  • DIY key pairing with EZ Installer
  • Digital spare key storage
  • Military-grade data encryption
Features
Read full description

If you can take a selfie, you can make a car key. The Car Keys Express app allows you to duplicate your car keys using the camera on your phone—all without leaving your home, while saving up to 75% off dealership pricing. It’s as easy as “pic and pair.” 1. Pic: Take pictures of your key. 2. Pair: We ship you a key, already cut and ready for pairing. Get keys for 90% of vehicles on the road. - The app cuts standard edge-cut blades and high-security laser cut keys. - Enter your vehicle’s make, model, and year in the app to determine if we can make keys for your vehicle. - Keys are typically cut within 2-3 business days. Keys for many vehicles can be paired with our do-it-yourself EZ Installer™*. - Easily pair new keys at the press of a button. - *See compatibility list at CarKeysExpress.com/app. Save a digital spare in the cloud—free of charge. - Protect yourself against future loss. - If your keys are lost or damaged, you can easily order replacements. We protect your information. - Data transmitted through our network is fully military-grade encrypted. - We securely store your personal information and key data in separate servers. - To protect against unauthorized duplication, we require you to submit proof of ownership (such as registration, insurance, or title). - We only ship keys to the address listed in the ownership documents.

Screenshots

BlueDriver OBD2 Scan Tool4 screens
Car Keys Express4 screens

Verdict

The call

The clearest difference is rating: BlueDriver OBD2 Scan Tool at 4.6 against Car Keys Express's 3.0. BlueDriver OBD2 Scan Tool also leads on update cadence (fortnightly vs every 4 months) and ratings volume (14K vs 23). Car Keys Express's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (10.0 vs 16.6). On price, review sentiment, 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

BlueDriver OBD2 Scan Tool holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: BlueDriver OBD2 Scan Tool has 14K ratings behind it against 23, so its average is the more settled of the two. Written reviews point the same way: 57% of BlueDriver OBD2 Scan Tool's written reviews are positive against 50% of Car Keys Express's.

UpkeepUpdate frequency

BlueDriver OBD2 Scan Tool ships an update fortnightly, Car Keys Express every 4 months. The most recent releases landed on October 21, 2026 and October 12, 2026 respectively.

Scorecard5 real differences · 5 level
BlueDriver OBD2 Scan Tool versus Car Keys Express: the parameters behind the verdict, then further details
ParameterBlueDriver OBD2 Scan ToolCar Keys Express
PriceFreeFree
Rating4.6 (14K ratings) — better3.0 (23 ratings)
Positive reviews57.2% of reviews — better50.0% of reviews
Number of ratings14K — better23
Update frequencyFortnightly — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.610.0 — better
Further details — not scored
Size273 MB92 MB
Age rating4+4+
DeveloperLemur Vehicle MonitorsCar Keys Express

Customer experience

BlueDriver OBD2 Scan Tool

All ratings13,728 ratings
Positive90.7%
Neutral2.2%
Negative7.1%
Written reviews885 reviews
Positive57.2%
Neutral5.3%
Negative37.5%

Car Keys Express

All ratings23 ratings
Positive43.5%
Neutral4.3%
Negative52.2%
Written reviews12 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Bugs and requests

BlueDriver OBD2 Scan Tool

Reported bugs

3 issues
  • Occasional app crashes
  • Failure to detect vehicle faults in some cases
  • Inability to update firmware on certain devices

Requested features

10 requests
  • Add support for more vehicle makes and models
  • Improve Bluetooth stability and connectivity
  • Implement odometer reading functionality
  • Expand diagnostic capabilities to include more advanced features
  • Add support for European vehicle VINs
Show 5 more
  • Enable reading of additional fault codes (e.g., airbag)
  • Maintain compatibility with older iOS versions
  • Introduce CarPlay integration
  • Add customizable live data dashboards
  • Implement audible alerts for critical sensor readings

Car Keys Express

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

BlueDriver OBD2 Scan Tool

No in-app purchases

None

Car Keys Express

No in-app purchases

Questions

Is BlueDriver OBD2 Scan Tool free?
BlueDriver OBD2 Scan Tool is free to download, with no in-app purchases.
Is Car Keys Express free?
Car Keys Express is free to download, with no in-app purchases.
Which has better reviews, BlueDriver OBD2 Scan Tool or Car Keys Express?
BlueDriver OBD2 Scan Tool is rated higher. BlueDriver OBD2 Scan Tool averages 4.6 out of 5 from 14K ratings, while Car Keys Express averages 3.0 from 23 ratings.
Do BlueDriver OBD2 Scan Tool or Car Keys Express have ads?
Neither BlueDriver OBD2 Scan Tool nor Car Keys Express shows ads.
Which is updated more often, BlueDriver OBD2 Scan Tool or Car Keys Express?
BlueDriver OBD2 Scan Tool ships an update fortnightly, and Car Keys Express every 4 months. Most recently, BlueDriver OBD2 Scan Tool was updated on October 21, 2026 and Car Keys Express on October 12, 2026.

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