OBD Fusion is an app for your car that allows you to read OBD2 vehicle data directly from your iPhon
e or iPad. You can clear your check engine light, create custom dashboards, read diagnostic trouble codes, estimate fuel economy, and much more!
Is your check engine light on? Do you want to monitor fuel economy and usage in your vehicle? Do you want cool looking virtual dashboards on your iPhone or iPad? If so, then OBD Fusion is the app for you! OBD Fusion is used by professional mechanics, do-it-yourself mechanics, and vehicle owners who want to monitor their vehicle and daily driving habits. Drive smarter, improve your fuel economy, and keep your engine healthy!
IMPORTANT NOTE: You must have a Wi-Fi ELM327 compatible adapter or compatible Bluetooth LE adapter such as Veepeak BLE/BLE+ 4.0 adapter, Carista BLE adapter, OBDLink MX+, OBDLink CX, Tonwon BLE adapter, LELink BLE adapter, Viecar BLE adapter, Lonauto adapter, Vgate iCar Bluetooth 4.0, BAST BLE adapter, Kiwi 3/4 to use this app. OBD Fusion is not compatible with generic ELM Bluetooth scan tools. Checkout additional adapters here: https://www.obdsoftware.net/software/obdfusion
OBD Fusion supports all OBD2 and EOBD vehicles sold worldwide. If you're not sure whether your vehicle is OBD2 or EOBD compliant, see this page for more information: https://www.obdsoftware.net/knowledgebase/obd2compliant. OBD Fusion can also connect to some JOBD vehicles that don’t support standard OBD2 protocols.
Electric vehicles (EVs) are not required to have OBD2 diagnostics since they are emissions exempt. If you are interested in using OBD Fusion on an EV, contact us first to inquire about support.
OBD Fusion has a ton of features including:
- Read and clear emissions-related trouble codes (fault codes) and your Check Engine Light (MIL)
- View vital driving information on your CarPlay screen. Note that real-time gauges are not supported by CarPlay, so you can't view your OBD Fusion pages such as dashboards on CarPlay.
- With optional enhanced diagnostic add-ons, you can read and clear enhanced trouble codes on other modules such as ABS, SRS, etc. and read transmission temperature. An enhanced diagnostic add-on is required for this functionality.
- Real-time dashboard display with fully customizable gauges. Create your own dashboards with the gauges that you want to see.
- Performance calculations for 1/4 mile and 0-60 mph track times
- Fuel economy MPG (US and UK), l/100km or km/l calculation
- Full diagnostic report that can be stored and shared
- Real-time graphing of multiple signals
- Real-time data logging and playback
- Multiple trip meters
- Log data to CSV file
- Create custom enhanced PIDs
- Includes some built-in enhanced PIDs for GM vehicles
- Display Boost pressure in real-time
- Display Engine Power and Torque
- Display calculated Air-to-fuel ratio
- Display battery voltage
- Read freeze frame data
- Fully customizable units including English, Imperial, and Metric units
- Over 250 supported PIDs
- Display vehicle information including VIN and calibration ID
- Emissions readiness for each US state. Find out if your car will pass emissions inspection.
- Oxygen Sensor Results (Mode 05)
- On-board Monitoring Tests (Mode 06)
- In-performance Tracking Counters (Mode 09)
- GPS tracking - plot vehicle parameters on a map
- Integrated iCloud and Dropbox functionality
- Available in English, Spanish, French, Italian, German, Czech, Greek, Chinese, and Portuguese
- Manufacturer specific Enhanced Diagnostics are available for certain vehicles through In-App purchases.
** Continued use of GPS running in the background can dramatically decrease battery life.
OBD Fusion is brought to you by OCTech, LLC, the makers of TouchScan and OBDwiz.
OBD Fusion is a trademark of OCTech, LLC registered in the U.S.
Screenshots of OBD Fusion iOS app
Reviews OBD Fusion for iphone
Great app!
5
By Rayray.650
Love this app
It works
5
By phacemeltar
Back in 2019 I bought a bunch of obd2 apps to work with my elm327 dongle and this was the best one. Fast forward to 2025 and this is the only app that works with my new dongle. It’s identical to the obdlink software except it has more functionality. I drive a Toyota so I don’t need the extended drivers, but I assume that works too. I love it I only wish there was GUI support for CarPlay. Having dials on my dash would be the bees knees. Still though, 10/10
Wonderful app, one request
5
By Jake freed
I used this app to create a drive analysis script that runs through shortcuts, I currently have to auth through Dropbox and download files before I can use them in the script locally
If there was a shortcut action to export the csv of the last data logs that would be amazing.
Regardless this is an amazing app for what it does.
Great App
5
By Mathwiz12345
Works plug-and-play with my Bluetooth adapter for 3.0L Duramax. Custom PIDs pull slip RPM, EGT, trans temp, boost, oil pressure, plus emissions stuff like DEF level, DPF soot load, regen status—essential for towing. Community PID files and forums make setup easy.
Bought and sensors got taken away.
4
By Deezp 88
Edit: apparently it wasn’t removed from the app but I had to “restore” past settings to get it back.
Original review- Bought app and after a year half of the sensors were taken away from the app. If you want to ever see your tranny temp again you have to pay $14.99 more!
Not worth it
3
By Rain City Music
So I downloaded this, it’s a little bit clunky getting it to work with iOS. And then I find out that Nissans are not included in the program. You can upgrade of course for another $75 if you want a template/macro that is only updated up to 2021. So I don’t recommend it.
Disappointed
2
By HelloImJosh
CarPlay mode does not show any gauges. The entire reason I paid $9.99 for the app AND $15 upgrade.
Charged 9.99 without consent
1
By Roofing4ms
I was charged 999 weekly after downloading this app do not recommend at all
Easy and cheap used with caution
1
By Hate2bscrewed
Been using this for a few years on and off for simple things like misfires.
There is a long lag in slow rate on misfires and O2 sensors had me chasing a misfire in cylinder 1 in fact, it was cylinder 2 on the opposite side of a V8 engine
Makes it tough to diagnose when the tool points you in the wrong direction
Best OBD app on the market
5
By Obdfusion
I don’t normally write reviews, but this app has been the best thing I’ve come across as far as OBD readers go. I’ve bought the enhanced packages for 3 vehicles, 1 ford and 2 Toyotas. 18’ f150, 11’ rav4 and 03’ sequoia. CarPlay is absolutely seamless. The lag when viewing live data is seemingly getting less and less. Outstanding.
