Best Bluetooth OBD2 Scanners: Turn Your Phone Into a Diagnostic Tool Iamcarhacker

Published: November 24, 2024 · Last updated: August 25, 2026

Best value overall, no debate? The XTool A30M. Want the most professional Bluetooth scanner around, with BMW and VAG coding among other brands, at tablet-level capability? Thinkdiag2, just budget for the subscription after year one. Full-system diagnostics on a tight budget with no subscription at all? Mucar BT200 Max. Cheapest possible entry with any ELM327 adapter you already own? Car Scanner ELM OBD2 app. Want to unlock hidden features and vehicle coding without committing to a yearly plan? Carista, pay for a single month when you need it.

I earn from qualifying purchases and sometimes get tools for free (full disclosure). It never affects my scoring.

Quick Picks – I Use These Everyday

Best Overall XTool A30M

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

🏷️ Use code CARHACKER – 10% off

Official website ›Check on Amazon ›AliExpress › Full review →

Best Features Thinkdiag2

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

🏷️ Use code CARHACKER – 10% off

Official website ›Check on Amazon ›AliExpress › Full review →

great budget full-system bi-directional bluetooth scanner. It also works with some elm327 apps like car scanner app.

✓One of cheapest full-system scanners
✓Free lifetime updates
✓Service and bi-directional functions included
✓Works with some other apps like Car scanner app
✓Built-in AI assistant

✕Diagnostic report layout could be better
✕ELM327 compatibility is limited -- Carista and some other apps do NOT work with this adapter anymore
✕No coding

🏷️ Use code CARHACKER – 10% off

Official website ›Check on Amazon ›AliExpress › Full review →

Best Value Car Scanner ELm OBD2 app

best obd2 app to start with. You need ELM327 adapter and smartphone to use it.

✓Cheap
✓Advanced
✓Especially for the price

Official website › Full review →

Easy to use coding app to unlock hidden settings in your car. PRO version also does some service resets and full-system code scan.

✓Easy for customizations
✓Works with most ELM327 adapters

✕Monthly/Yearly subscription

🏷️ Use code CARHACKER – 15% off

Official website › Full review →

Pro Tip. For app-based options like Carista or Car Scanner, you don’t need to buy their branded adapter. Any decent ELM327 works with both, so pick one adapter and it covers you for either app. → Best ELM327 OBD2 adapters

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

✅ These won

XTool A30M

Thinkcar BD6

Thinkdiag2

Vgate iCar pro 2s

Car Scanner ELm OBD2 app

👍 I like these too, but they didn't make the top

OBDLink MX+

One of best ELM327 adapters but is quite expensive for just basic use. Buy if you have some specific software in mind that requires using it.

Read review

XTool A30D

Cheaper version of XTool A30m has almost all of the A30M features. Only difference is less amount of service resets (about 14 compared to 26 in A30M). Save about 30% of the A30M price if you don't need them.

Read review

Vgate Vlinker MS

Best value ELM327 adapter comparable to OBDLink MX+. But now you can buy full-system scanner for this price.

Read review

Topdon Topscan (lite)

Topdon topscan is great cheap full-system scanner even with bi-directional function but you have to pay yearly subscription.

Read review

Kingbolen Ediag Elite

Very capable full-system bi-directional scanner even with built-in AI assistant and lifetime free updates. I just like the XTool A30M little bit more.

Read review

Konwei Kdiag

Cheapest full-system BI-directional adapter you can buy but in my testing it only worked well for Asian brands. For german brands it supported more or less only basic engine scanning.

Read review

⚠️ Avoid these — waste of money

Carly OBD

One of worst value for money adapters out there. They make all the efforts to not disclouse you are buying only yearly subscription and refunds are almost impossible.

Read review

FIXD

FIXD is not a scam like Carly however their PRO subscription does nothing that you cannot do with free ChatGPT.

Read review

Garage PRO

Too overpriced for what it actually can do.

Read review

Why these five, and what each one is really for

The XTool A30M is still my top value pick, no debate. Nothing else at this price does full-system work with this much reliability, and the price to usefulness ratio just isn’t matched anywhere else on this list.
→ Read full review of XTool A30M

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 Mucar BT200 Max is the budget pick that still covers full-system diagnostics properly. It has an AI assistant, service functions and active tests, all for very little money and with no subscription attached.
→ Read full review of Mucar BT200 Max

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

Carista is my pick for coding hidden features in your car. It runs on a subscription, but Carista works on credits rather than a hard lock-in, so you can pay for a single month, do all your coding in that window, and you’re not stuck paying for months you don’t use.
→ Read full review of Carista