Gretio User Reviews

Gretio
Gretio
Surreal Development LLC

Top reviews

2017 GMC Canyon with 19 miles before limp

Found a forum where the author said he had a truck like ours with similar issues, and that he had an app for that! Bought the OBD link mentioned for $138 on Amazon and paid the $20 for the app. We also replaced the Nox sensor 1 to start fresh(er). Hooked the OBDlink up to Bluetooth, used the Gretio app to run the DPF Service Regen, (so cool to watch the soot percentage come down)then the DPF Reset, then the Reductant System Malfunction Warning Service Bay Test and all is right in the world again.
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Best $20 I’ve ever spent!

Look, I’m a Soldier stationed overseas in Italy, NO GMC dealerships here. I got the dreaded “Exhaust Fluid Quality Poor” message in my 2017 Canyon, and I was freaking out, because I still have 3 years left in Italy. I swapped both NOx sensors and the speed limit warning did not go away, I kept searching and I came across the OBDLink MX+ and the Gretio App, I ran the Reductant System Malfunction Warning Service Bay Test through the Gretio App and BOOM! Problem solved! I’ll keep paying the yearly subscription out of gratitude for this fantastic app! Thank you!
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GM ultimate app!

Many options and deep diagnostics on every module for these newer models! Great addition for a technician or at home mod fanatic!

GM Diesel Enthusiast Must Have

The combination of this app and its concise diesel emission trouble shooting guide are invaluable! Using them, along with OBDlink MX+, I was able to resolve the “Exhaust Fluid Quailty Poor” issue that was on the verge of bricking my LWN diesel. Being able to conduct diagnostic tests to resolve diesel emission issues removes the haunting fear of diesel ownership. I give thanks to the developer for sharing his skill and automotive passion!
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Connectivity

Could you please fix the issue of not connecting to the OBD Bluetooth device. It shouldn’t take 10 minutes and 87 attempts

Cleared the dreaded DEF loop

When all other scanners and code readers failed, this app let me do a service bay test that cleared that code after I changed my NoX sensors. Cannot say enough good things!

Excellent

Used it to force a regen and run a service bay test after replacing a Nox sensor. Ran both successfully.

Advanced users

This is an excellent app and a must have in my case.

2018 Chevy Cruze Diesel

Needed to perform regens manually! I’ve initiated & verified a few, while cruising at speed. 👍🏻 Not many options for advanced GM OBD via iOS! Gretio fills endless gaps that I’m continuing to learn.

Do your research before you dive in. Other users leave crappy reviews because they expect iOS like fuzzy interfaces. Manufacturers don’t make it easy to tap into their electronics- find a forum & discuss your vehicle and plans- The OBD MX hardware isn’t cheap either, so know the soup before you taste it.

The developer of this program is very helpful! He’s quite active on various Chevy cruise forums I can verify! You want this if you expect such an important app not to break.
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Gretio app

Don’t waste your money on this one
Very basic do nothing app that advertises as equal to torque 1

Best app ever

Don’t bother with the rest. Just get this app and you will have some control over your diesel.
My truck Colorado 2.8 Diesel flashed power reduced DPF pressure to high.
I was able to run (with this app) a regen of the DPF and the code cleared. If it wasn’t for this app I would have been a hostage of the dealer.
Great app.
Thanks
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