ThinkDiag+
What features does the free version of ThinkDiag+ offer?
The free version lets you read and clear engine diagnostic trouble codes instantly, view live data like coolant temperature and fuel trims, and generate detailed reports you can email. However, advanced modules like ABS, airbags, and transmission are locked unless you buy ThinkDiag's own dongle.
Can ThinkDiag+ work with any generic ELM327 Bluetooth adapter?
Yes, it connected to my cheap $15 ELM327 dongle without any compatibility issues on my 2012 Hyundai Elantra. But with a generic adapter, you'll only have access to the engine computer; other systems like ABS or airbags will be grayed out.
Why are some features like ABS and transmission scanning grayed out in the app?
Those features require an authorized ThinkDiag+ hardware dongle to unlock. The app is designed to work fully only with their own device, so if you're using a generic adapter, you'll be limited to the engine control module.
How do I use ThinkDiag+ to diagnose a rough idle or performance issue?
Plug in the adapter, open the app, and read the trouble codes first. Then use the live data feature to monitor sensors like the MAF or oxygen sensors while revving the engine—erratic readings can pinpoint a dirty sensor or vacuum leak, just like we did on my friend's Jeep.
How does ThinkDiag+ compare to other free scanner apps like Torque Pro?
ThinkDiag+ offers a cleaner, ad-free interface and feels more polished out of the box than many free alternatives. However, it heavily pushes you toward buying their proprietary dongle for full functionality, whereas Torque Pro works with more generic adapters across all vehicle modules without extra hardware costs.
