OCTech, LLC
4.7 
Category: Communication
Price: $5.99
Age Rating: Everyone
Rating: 4.7
Available on: /
Updated on: May 28, 2026
With OBD Fusion, users can perform full vehicle diagnostic scans to identify trouble codes and issues. The app decodes these codes in clear language, making it easier for users to understand what might be wrong and how urgent the repairs may be.
The app features a customizable dashboard that lets users arrange gauges and data displays according to their preferences. This personalization makes it easier to access the information that matters most, enhancing the overall user experience while driving or troubleshooting.
OBD Fusion offers a historical data logging feature that stores past performance metrics and diagnostic trouble codes. Users can review this data over time to identify trends, making it easier to spot recurring issues and maintain their vehicle's health more effectively.
OBD Fusion allows users to monitor real-time data from their vehicle's engine and systems. This feature provides insights into parameters like speed, RPM, fuel consumption, and more, helping users stay informed about their car's performance and health while on the road.
Access real-time data from your vehicle's engine and systems. Easily read and clear diagnostic trouble codes. Monitor fuel efficiency and other performance metrics for better driving habits. User-friendly interface makes diagnostics straightforward for everyone. Compatible with a wide range of vehicles and OBD-II adapters. 
Limited compatibility with some older vehicle models may restrict usage. User interface can be complex for beginners, leading to confusion. Frequent updates required for optimal performance may be inconvenient for users. OBD Fusion is a versatile vehicle diagnostic tool used primarily for real-time engine monitoring and troubleshooting. In daily driving, users often utilize the app’s customizable dashboards to display critical data not found on standard instrument clusters, such as transmission temperature or precise fuel economy. For DIY mechanics, the application is indispensable for reading and clearing "Check Engine" lights, conducting emissions readiness tests before state inspections, and performing deep-system scans. It is also a popular companion for off-roading and overlanding enthusiasts who need to monitor vehicle health in remote environments where traditional mechanical support is unavailable.
The app offers a professional-grade interface that prioritizes data density and customization. Users can create multiple dashboard layouts with various gauge styles, including digital readouts and analog dials, though newcomers may face a slight learning curve when configuring specific PIDs (Parameter IDs). The integration with Apple CarPlay and Android Auto is a standout feature, allowing users to view vital statistics directly on their vehicle's head unit. While the connection stability is generally excellent, the experience is highly dependent on the quality of the OBD-II hardware; high-end Bluetooth LE adapters provide seamless real-time graphing, whereas low-cost clones may occasionally result in slower refresh rates or data lag.
OBD Fusion follows a premium purchase model rather than a recurring subscription, with the base app typically costing $12.99 on major app stores. While the initial purchase includes full access to standard OBD-II diagnostics and dashboard features, "Enhanced Diagnostics" for specific manufacturers like Ford, Toyota, or Mazda are available as one-time in-app purchases. These add-ons, ranging from $14.99 to $19.99 per vehicle manufacturer, unlock proprietary sensors and advanced modules such as ABS and Airbag systems. This modular pricing allows users to pay only for the deep-level data relevant to their specific vehicle fleet without ongoing monthly fees.
OCTech maintains an aggressive update schedule, frequently adding support for the latest vehicle model years, including 2026 releases for major brands like Mazda and GM. Support is primarily handled via email and a comprehensive online knowledge base, with developers often responding directly to user reviews to troubleshoot connectivity issues. Recent technical updates have introduced support for state-defined PIDs and improved data logging export options, reflecting a commitment to evolving user needs. The developer consistently patches compatibility issues for new mobile operating systems, ensuring the software remains a reliable long-term tool for automotive maintenance.
Security & Privacy Review
Google Play 
App Store 
Great app but unless I'm missing something there is no option for gauges in Android Auto. That was my only reason for purchasing this app and it turns out it's the same output in Android Auto as the free app without paying. The output is delayed as well so much so that the RPM is back to idle before the increase even registers. I'm using a VEEPEAK adapter too, not one of those cheap ones so that's not the issue. I'm pretty disappointed but hopeful the devs will add gauges.
Update: I have once again found a fix. I turned off mobile data. I have it connecting 3 out of 3 times. Update: I am once again unable to connect to my wifi OBD2 device. I am still able to connect with different software (Car Scanner), so I don't think it's entirely a hardware issue. Ok, so following the instructions imbedded in a different app (OBD Mary), I found that by disabling battery optimization I could get it to work every time. You may want to include this information in your app.
keeps disconnecting from Bluetooth OBD2 dongle, have used this app for many years but now all the sudden it keeps disconnecting from the dongle. they don't go works with other OBD2 apps but for some reason it quit working with this one. it will connect I'll start to try to read codes and then it disconnects every time. makes it unusable.
I'm using a cheap little plug in to the OBD connector called Dicknos Elm327 mini Bluetooth that I got for 8 bucks from Amazon for two of them and it works better than any other cheap scanner it's a 100% upgrade because now I can monitor the cooling temperature sensor the O2 readings the maff and map readings as well as the catalyst and the EVAP system while all the car is running and it's accurate great app it was worth the $5 thank you
⭐⭐⭐⭐ (4/5) OBD Fusion is an excellent technical diagnostic app for monitoring my 2008 Toyota Prius, paired via a Veepeak OBDCheck BLE. It can be finicky to connect if booted in the wrong sequence. It has a steep learning curve and a complex interface. Tracking hybrid data points like block voltages or inverter temps requires a paid "Enhanced Diagnostics" add-on. Still, as a scientist, I find the unlocked tracking resolution and logging granularity to be an excellent analytical value!
Review Source: Google Play store public user reviews.
OBD Fusion prioritizes user privacy and does not collect personal data unless explicitly provided by the user for support or feedback purposes.
OBD Fusion does not offer a free version, but it typically provides a free trial period that allows users to explore the app's features before committing to a subscription.
OBD Fusion does not require a constant internet connection to function; however, some features, like vehicle databases and updates, may require internet access.
You can contact OBD Fusion support or send feedback through the app's settings menu, where you will find options for customer support and feedback submission.
You can manage or cancel your OBD Fusion subscription through your app store account settings, where you can view your subscriptions and make necessary changes.
Customer numbers are unique and cannot be changed. If you need assistance, please reach out to customer service.
Yes, you can log in to your OBD Fusion account from multiple devices using the same credentials.
You can reach our customer service by emailing support
You can update your customer information by logging into your account and navigating to the profile settings section.
To log in, open the app and enter your registered email and password. If you’ve forgotten your password, use the "Forgot Password" link.
- Added support for displaying Info Types on gauges, graphs, etc.- Added manufacturer PIDs for transmission temperature for some Subaru vehicles.- Multiple bug fixes and improvements.
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