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Piston – OBD2 Car Scanner icon

Piston – OBD2 Car Scanner — Addictive OBD2 car scanner for your phone

Android Auto And Vehicles Stinez Pty Ltd
4.2 GP
1,304,567+
Google Play

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Description

Been using Piston – OBD2 Car Scanner for a couple months now. It’s basically an app that turns your phone into a car diagnostic tool. Pretty solid if you’re into that kinda thing.

Here’s what you do: you plug in this little adapter to your car’s OBD2 port, then Piston connects to it over Bluetooth or WiFi. There’s a bunch of cool features – you can read trouble codes, see freeze frame data, and even clear the check engine light. Took me a while to figure some of it out but it’s pretty user-friendly overall.

Look, if you’re into fixing up your car or just want to know what’s going on under the hood, you’ll probably like this app. It’s not perfect – the adapter can be a pain to set up sometimes – but it does the job. Worth checking out if you need an OBD2 scanner.

Editor Opinion

I've tested a bunch of OBD2 apps and Piston is one of the better ones. The interface is pretty clean and intuitive, and it's got a solid set of features for diagnostics and troubleshooting. And not the cheapest option out there, but the paid version unlocks some useful extras. In my experience, the adapter can be a bit finicky to set up, but once you get it working, it's a pretty reliable tool. Overall, a good option if you need an OBD2 scanner on your phone.

Manya Lyalya
Author Manya Lyalya Editor, Grand Screen

Pros & Cons

Pros

  • Tons of useful diagnostic features like trouble codes and freeze frame data
  • Clean, intuitive interface that's easy to navigate
  • Paid version unlocks some extra capabilities
  • Works well with most Bluetooth and WiFi OBD2 adapters
  • Free version is a good starting point before upgrading

Cons

  • The OBD2 adapter can be a pain to set up at first
  • Paid version is a bit pricey compared to some competitors
  • Gets repetitive if you're not actively working on your car
  • Occasional connectivity issues with the adapter

Specifications

Updated 11.10.2025
Category Auto And Vehicles
Age Rating Everyone
Developer Stinez Pty Ltd
Android Android 6.0++
Package Name com.clockworkbits.piston

Ratings

84
Google Play
4.2/5
5,365 reviews
Generally Favorable
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User Reviews

Absolom Green Oct 14, 2025

This is a good alternative app to use with CaRPM OBD2 reader if you don't like theires, it also supports more active PiDs at a time.

Cole Gerdemann Oct 14, 2025

Great! Very simple and clear UI. Only OBDII reader app that works well and doesn't look like it is 6+ years old!

J M Oct 14, 2025

Most often tasks are connect Bluetooth, load faults, clear faults. Would it be possible to make these steps a widget, only requiring one click to do all three?

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