Best Bluetooth OBD2 Scanners: Turn Your Phone Into a Diagnostic Tool
Published: November 24, 2024 · Last updated: May 29, 2026
A Bluetooth scanner turns the phone already in your pocket into a real diagnostic tool, often for a fraction of what a proper scan tablet costs. The catch is that “Bluetooth scanner” covers everything from a few euros of app-and-adapter up to something that rivals a $500 tablet. These five are the ones that earned their place on real cars in my garage, picked so there’s a right answer at every budget.
I earn from qualifying purchases and sometimes get tools for free (full disclosure). It never affects my scoring.
Quick Picks – I Use These Everyday
XTool A30M 9.1 / 10
Best overall value for money for Bluetooth OBD2 scanner.
- ✓Amazing value for money
- ✓Adapter has built-in flashlight to help you see obd2 port
- ✓One of my personal favourite tools
- ✓Free updates
- ✕Can only use landscape mode
Thinkcar BD6 8.4 / 10
entry-level thinkcar bluetooth scanner more capable than simple ELM adapters.
- ✓Full-system scan and live data (access to ABS/Transmission/Radio and other modules)
- ✓Good budget pick for used car check or basic diagnostics
- ✓Even comes with basic service resets
- ✓Free lifetime updates
- ✓On my tested cars
- ✓Scan was fast (faster than 10x more expensive tools)
- ✕No Bi-directional testing
Thinkdiag2 8.5 / 10
most advanced bluetooth OBD2 scanner for smartphone users with full-system access and coding
- ✓Most advanced scanner to use with smartphone
- ✓1-year free updates/subscription
- ✓Can unlock hidden features in many brands
- ✓Never failed to connect (I am using it for 4 years already)
- ✓Comparable to $400-600 scan tool tablets
- ✕Yearly subscription
Vgate iCar pro 2s 8.5 / 10
updated vgate bluetooth adapter with good compatibility across diagnostic and coding apps
- ✓Updated Vgate adapter line with good compatibility
- ✓Compact low-power design
- ✓Very cheap entry to app-based diagnostics
- ✕Engine-only
- ✕No advanced functions
- ✕Quality still below premium adapters like OBDLink MX+
Car Scanner ELm OBD2 app 8.2 / 10
best obd2 app to start with. You need ELM327 adapter and smartphone to use it.
- ✓Cheap
- ✓Advanced
- ✓Especially for the price
VIDEO: Bluetooth OBD2 scanners explained
By the way, I did a full video review & explanation of Bluetooth OBD-II scanners.
More scanners I liked during my testing
XTool A30M
Thinkcar BD6
Thinkdiag2
Vgate iCar pro 2s
Car Scanner ELm OBD2 app
Why these five, and what each one is really for
These are the five Bluetooth scanners I keep coming back to. They’re not all the same level, and that’s the point: the spread runs from a cheap app-and-adapter to a tool that does what a mid-range tablet does, all from your phone. Pick the one that fits the work you actually do, not the longest feature list.
The XTool A30M is the one I recommend to most people, and one of my own favourites. It does proper full-system work over Bluetooth, not just engine codes, with a long list of service resets and free updates that stay free. The detail I appreciate every time: the adapter has a built-in flashlight, so you can actually find the OBD port under the dash. It’s landscape-only on screen, which is a small annoyance and nothing more.
→ Read full review of XTool A30M
The Thinkcar BD6 is the budget pick that still does real work. Full-system scan with live data on ABS, transmission, radio and the rest, a few basic service resets, and it reads fast, faster than some tools costing ten times as much. What you give up at this price is bidirectional testing, so you can read and reset but not actively command components. For used-car checks and everyday faults, that’s plenty.
→ Read full review of Thinkcar BD6
The Thinkdiag2 is the most capable of the bunch and the one I keep in my second car for phone-only days. It does full-system coding that most Bluetooth tools can’t touch, unlocks hidden features across a lot of brands, and in four years it has never once failed to connect. It gets close to what a $400-600 tablet does, from your phone. The catch is the yearly subscription, so price that in before you buy.
→ Read full review of Thinkdiag2
The Vgate iCar Pro 2s is the cheap, low-power adapter for someone dipping a toe into app-based diagnostics. It pairs well with the common diagnostic and coding apps, it’s tiny, and it costs almost nothing. Be clear on what it is, though: it’s engine-only with no advanced functions, and the build sits a step below premium adapters like the OBDLink MX+. A starter, not a workshop tool. → Read full review of Vgate iCar Pro 2s
The Car Scanner ELM OBD2 app is where I’d point anyone on the tightest budget. It’s just an app, so you pair it with any cheap ELM327 adapter and your phone, and for the money it’s surprisingly advanced. It won’t match a full-system tool, but if you mainly want to read codes, watch live data and clear lights, it does the job for the price of a coffee or two.
→ Read full review of Car Scanner ELM OBD2 app
The job over the tool
The spread here is wide, same as it is with tablets. A few euros of app-and-adapter and a tool that rivals a $500 tablet will both read the same fault code and clear the same light. The extra money buys coding, bidirectional control and wider coverage, not magic. Work out what you actually need to do on your car, then buy the cheapest thing on this list that does it.
When I’d skip Bluetooth altogether
Bluetooth is brilliant for diagnostics, service resets and light coding from your phone. Where it runs out is the heavy stuff. Serious key programming or ECU flashing is a different class of job, and the tools that do it properly sit in a much higher budget bracket. No Bluetooth dongle takes you the whole way there, and neither does a cheap tablet. At the other end, if you only ever clear a check-engine light once a year, you don’t need the A30M, the cheapest ELM327 and a free app will do.
Frequently asked questions
Can a Bluetooth OBD2 scanner do as much as a tablet scanner?
Yes, full-system scanners like XTool A30M or Thinkdiag2 can do same stuff as more expensive tablet scan tools.
Can a Bluetooth OBD2 scanner do coding and bidirectional tests?
Yes (not all of them).
What are differences between Bluetooth OBD2 scanners?
2 main types are ELM327 adapter and full-system adapter. ELM327 usually comes only as adapter without software and you are using it with different apps from app store. Full-system adapters uusally work with their own software giving you more features like bi-directional testing, access to all modules or service resets.
Is it safe to leave a Bluetooth OBD2 dongle plugged in?
Most of the adapters mentioned here come with sleep function so it stops draining battery when you are not using your car. Even without sleep function, obd2 adapter will not drain good charged battery overnight.
Most popular OBD2 guides
Which one is best for electric vehicle?
Thinkdiag2, but for electric you should verify compatiblity with your model first here: https://h5.thinkcar.com/coverage
Hello, what is the best scanner for the Volkswagen Jetta Clasico 2014?
One of these: https://iamcarhacker.com/best-obd-ii-scanners-for-vw-audi-skoda-seat/
Hi Juraj, Which one is best for Lexus RX450h hybrid car?
Hi one of these: https://iamcarhacker.com/best-obd-ii-scanners-for-toyota-lexus/