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Gretio

Gretio

The Missing Pocket Scan Tool

23 ratings
19 reviews
🔧 Utilities
📊 Productivity
Free
In-App Purchases

Details

Released
July 2, 2021
Updated
October 27, 2026

Features

Developer

Surreal Development LLC
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Gretio screenshot #1 for iPhone
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Gretio screenshot #6 for iPhone
iphone
ipad
🧾$34.99
In-App Purchase↘︎
⭐19
Reviews↘︎
🔄6+ apps
Alternatives↘︎
❓8 answered
FAQ↘︎
📦~ in 3 weeks
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About

This app allows advanced vehicle diagnostics and service functions for diesel, gas, electric, and hybrid cars. It analyzes thousands of data points, looks up trouble codes across all modules, and performs service regenerations and tests. Designed for DIY users, it requires specific hardware and vehicle compatibility.

✓Advanced vehicle diagnostics
✓Analyze thousands of data points
✓Diagnostic trouble code lookup
✓Perform service functions (DPF regen, SCR tests)
✓Program vehicle features
✓Supports diesel, gas, electric, hybrid vehicles
Show original description
+1

What's New in Gretio

1.08.07

October 27, 2026

Fixes several rare app crashes that could occur when disconnecting

3

Subscriptions & In-App Purchases

Gretio All Access

All Access to Gretio's features

$19.991 Year
How to cancel Gretio subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

App will not perform a regen

This app is absolute garbage!! Will not perform a regen as advertised and you will not be able to get a refund for this garbage after you figure that out!!! More foreigners making garbage for us Americans to waste our money on!
FF•YOU

Phenomenal for 16 LML Duramax

I bought the lml rpo pack and have been using gretio with the obdlink mx+ to work on my 2016 Chevrolet Duramax LML and it’s been great. From the egr cooler bypass valve to the reductsnt tank heaters to the NOX2 sensor, this has proven to be invaluable and helped save me thousands of dollars doing things myself. Highly recommended!
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MMuthahumpa

Connection problems with obdlink mx+

I bought the lml rpo pack and have been using gretio with the obdlink mx+ to monitor my 2016 lml duramax while driving. There are connection problems. I connect the obdlink mx+ to my iphone 11 pro running iOS 18.5, but when i then try to connect gretio, it doesn’t connect and the obdlink also disconnects and then has problems reconnecting. Ultimately , after factory resetting the obdlink and reconnecting from scratch, gretio will connect. But not always. Sometimes gretio still won’t connect and still disconnects the obdlink. Very frustrating. Sometimes it works and sometimes not. Something is not right.
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MMuthahumpa

Extremely powerful for the cost

Worth every penny considering a dedicated scan tool with the same capabilities would cost you over a thousand bucks. I downloaded this app just for the service bay test function to clear the dreaded “poor DEF quality” countdown to limp mode on my diesel Colorado. Highly recommend!
DDDevin A Dude

Incredibly Capable

Though not super slick and sometimes crashes, this app is an absolute powerhouse for dealing with complex, intermittent sensor issues in modern diesels. Without question, I would not have been able to resolve my issue without it. Be sure to track down their troubleshooting guide if you are chasing diesel emissions issues. The guide brings context to the data and maps a path to resolution.
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PAPeter at Hughes Auctions

Response from developer

Thanks for the feedback, and I am glad it fixed your issues :)

See 14 more reviews

FAQ

What vehicles does Gretio support?

Gretio only functions on certain makes and models. A list of known supported vehicles can be found on the developer's website at https://surrealdev.com/gretio/. It is designed for diesel, gas, electric, or hybrid vehicles.

Does Gretio require any special hardware?

Yes, Gretio requires the use of an OBDLINK MX+ to perform its advanced diagnostic functions. This hardware is essential for the app to communicate with your vehicle's systems.

What kind of service functions can Gretio perform?

Gretio can perform advanced service functions such as diesel particulate filter service regenerations, selective catalytic reduction tests, power relay tests, and can even program some vehicle features. Always follow your vehicle's service manual for these procedures.

How often is Gretio updated?

The latest version of Gretio is 1.08.07, which was last updated on October 27, 2026. This indicates a recent update, suggesting ongoing development and support for the application.

What is the user rating for Gretio?

Gretio has a user rating of 3.8 stars based on 23 ratings. This suggests a generally positive but mixed reception from its user base.

What are the subscription options for Gretio?

Gretio offers a subscription plan called 'Gretio All Access' priced at $19.99 per year. This subscription likely unlocks the full range of advanced features and diagnostic capabilities.

Is Gretio suitable for beginners?

Gretio is described as an advanced tool made for the DIY market. While it offers powerful features, users should be prepared to consult their vehicle's service manual for proper procedure execution.

Does Gretio have ads?

No, Gretio does not contain advertisements. The app is free to download and use, with in-app purchases available for advanced features or subscriptions.