--- title: "Gretio - Reviews, Revenue and Downloads in United States | Apple App Store" description: "The popular vehicle diagnostic tool is now on iOS! Use Gretio with an OBDLINK MX+ to perform advanced diagnostic functions on your vehicle. Analyze thousands of different data points at high speeds." --- # Gretio — United States > The Missing Pocket Scan Tool ![Gretio App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/62/1f/c9/621fc90f-fb83-1a6f-6d2a-c692ee6f2e26/AppIcon-0-0-1x_U007emarketing-0-11-0-85-220.png/400x400bb.png) **Developer:** [Surreal Development](https://apptail.io/developer/surreal-development-Ohvb) **Category:** Productivity **Rating:** 4.0/5 (21 ratings) **Price:** Free **Bundle ID:** com.surrealdev.gretio **Store:** Apple App Store **Country:** United States **Version:** 1.08.07 (released 2026-10-27) **Original Release:** 2021-07-02 **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1498320180) **AppTail Page:** [https://apptail.io/app/gretio-XdQd/united-states](https://apptail.io/app/gretio-XdQd/united-states) ## Gretio Description The popular vehicle diagnostic tool is now on iOS! Use Gretio with an OBDLINK MX+ to perform advanced diagnostic functions on your vehicle. Analyze thousands of different data points at high speeds. Look up diagnostic trouble codes for all modules including the Engine Control Module, Chassis Control Module, Body Control Module, Radio, and more. Perform advanced service functions such as diesel particulate filter service regenerations, selective catalytic reduction tests, power relay tests, and even program some features. Gretio is an advanced tool made for the DIY market. All procedures must be used in accordance with the vehicle's service manual or other OEM approved literature. Gretio is made exclusively for General Motors vehicles. Additional models will be supported in the future. ## Gretio Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/4b/04/e1/4b04e108-9019-afb9-10d8-b1b9b1445714/6105aaac-26c5-4063-b3da-069ecc8f6c68_Apple_iPhone_11_Pro_Max_Screenshot_0.png/1242x2688.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/20/18/e8/2018e878-1550-bedc-1078-5d7f8510973e/262b67d0-db25-4d45-953c-ff046c7d912e_Apple_iPhone_11_Pro_Max_Screenshot_1.png/1242x2688.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/7e/64/b0/7e64b09a-74c3-805a-dce9-f358c9b91756/5230e379-b344-4e9b-97a9-6218158494b9_Apple_iPhone_11_Pro_Max_Screenshot_2.png/1242x2688.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/68/66/c1/6866c111-0017-4b25-7ad7-c2a19268c910/df9df4af-b1d2-46bf-aba3-9e379a51779f_Apple_iPhone_11_Pro_Max_Screenshot_3.png/1242x2688.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/5b/a2/b6/5ba2b65d-5dbc-4c8c-4f88-abe0df598ba1/26254d7c-3e9f-4a00-955c-6aed477ae9f0_Apple_iPhone_11_Pro_Max_Screenshot_4.png/1242x2688.png) ## Gretio Rating Breakdown in United States - 5 stars: 15 (71%) - 4 stars: 1 (5%) - 3 stars: 0 (0%) - 2 stars: 0 (0%) - 1 stars: 5 (24%) ## Gretio Reviews in United States ### ***** "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! -- Muthahumpa, 2025-10-08 ### ***** "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! -- Devin A Dude, 2025-06-01 ### ***** "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. -- Peter at Hughes Auctions, 2024-12-20 ### ***** "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. -- Trailmomweezee, 2024-11-13 ### ***** "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! -- The Roost3r, 2024-10-23 ### ****- "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! -- MetlMann6385, 2024-10-20 ### ***** "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! -- Exercise rest timer, 2024-07-14 ### *---- "Connectivity" Could you please fix the issue of not connecting to the OBD Bluetooth device. It shouldn’t take 10 minutes and 87 attempts -- Brad1103., 2024-07-10 ### ***** "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! -- Stings Bulgarian Cousin, 2024-05-11 ### *---- "Gretio app" Don’t waste your money on this one Very basic do nothing app that advertises as equal to torque 1 -- Tv shah1xt, 2023-10-06 [View all Gretio reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews) ## Gretio In-App Purchases | Item | Price | |------|-------| | Gretio All Access | $19.99 | | Gretio RPO Pack 1 | $29.99 | | Gretio RPO Pack 2 | $29.99 | | RPO Pack 3 | $29.99 | ## Apps Similar to Gretio - [RSR Alignment App](https://apptail.io/app/rsr-alignment-app-JJbb/united-states) - [New Leader Mobile](https://apptail.io/app/new-leader-mobile-WBtb/united-states) - [Graco Auto Lube](https://apptail.io/app/graco-auto-lube-Tlwb/united-states) - [Giotto ScanTool](https://apptail.io/app/giotto-scantool-Vquc/united-states) - [bmTuned](https://apptail.io/app/bmtuned-pZPc/united-states) - [Wash-Eye® Mobile](https://apptail.io/app/wash-eye-mobile-ujed/united-states) - [Rig Mechanic](https://apptail.io/app/rig-mechanic-fpld/united-states) - [ALFA OBD - Car Diagnostic App](https://apptail.io/app/alfa-obd-car-diagnostic-app-pArq/united-states) - [Remote PLC](https://apptail.io/app/remote-plc-iyWt/united-states) - [OBDAI OBD2 Scanner & ELM327 AI](https://apptail.io/app/obdai-obd2-scanner-elm327-ai-uhSu/united-states) ## Gretio Available In - [United States](https://apptail.io/app/gretio-XdQd/united-states) - [Canada](https://apptail.io/app/gretio-XdQd/canada) - [Angola](https://apptail.io/app/gretio-XdQd/angola) - [Argentina](https://apptail.io/app/gretio-XdQd/argentina) - [Austria](https://apptail.io/app/gretio-XdQd/austria) - [Australia](https://apptail.io/app/gretio-XdQd/australia) - [Azerbaijan](https://apptail.io/app/gretio-XdQd/azerbaijan) - [Belgium](https://apptail.io/app/gretio-XdQd/belgium) - [Bulgaria](https://apptail.io/app/gretio-XdQd/bulgaria) - [Bermuda](https://apptail.io/app/gretio-XdQd/bermuda) - [Brazil](https://apptail.io/app/gretio-XdQd/brazil) - [Belarus](https://apptail.io/app/gretio-XdQd/belarus) - [Belize](https://apptail.io/app/gretio-XdQd/belize) - [Switzerland](https://apptail.io/app/gretio-XdQd/switzerland) - [Chile](https://apptail.io/app/gretio-XdQd/chile) - [China](https://apptail.io/app/gretio-XdQd/china) - [Colombia](https://apptail.io/app/gretio-XdQd/colombia) - [Cyprus](https://apptail.io/app/gretio-XdQd/cyprus) - [Czechia](https://apptail.io/app/gretio-XdQd/czechia) - [Germany](https://apptail.io/app/gretio-XdQd/germany) - [Denmark](https://apptail.io/app/gretio-XdQd/denmark) - [Dominican Republic](https://apptail.io/app/gretio-XdQd/dominican-republic) - [Algeria](https://apptail.io/app/gretio-XdQd/algeria) - [Ecuador](https://apptail.io/app/gretio-XdQd/ecuador) - [Estonia](https://apptail.io/app/gretio-XdQd/estonia) - [Egypt](https://apptail.io/app/gretio-XdQd/egypt) - [Spain](https://apptail.io/app/gretio-XdQd/spain) - [Finland](https://apptail.io/app/gretio-XdQd/finland) - [France](https://apptail.io/app/gretio-XdQd/france) - [United Kingdom](https://apptail.io/app/gretio-XdQd/united-kingdom) - [Greece](https://apptail.io/app/gretio-XdQd/greece) - [Hungary](https://apptail.io/app/gretio-XdQd/hungary) - [Indonesia](https://apptail.io/app/gretio-XdQd/indonesia) - [Ireland](https://apptail.io/app/gretio-XdQd/ireland) - [Israel](https://apptail.io/app/gretio-XdQd/israel) - [India](https://apptail.io/app/gretio-XdQd/india) - [Iceland](https://apptail.io/app/gretio-XdQd/iceland) - [Italy](https://apptail.io/app/gretio-XdQd/italy) - [Jamaica](https://apptail.io/app/gretio-XdQd/jamaica) - [Jordan](https://apptail.io/app/gretio-XdQd/jordan) - [Japan](https://apptail.io/app/gretio-XdQd/japan) - [Kenya](https://apptail.io/app/gretio-XdQd/kenya) - [South Korea](https://apptail.io/app/gretio-XdQd/south-korea) - [Kuwait](https://apptail.io/app/gretio-XdQd/kuwait) - [Cayman Islands](https://apptail.io/app/gretio-XdQd/cayman-islands) - [Kazakhstan](https://apptail.io/app/gretio-XdQd/kazakhstan) - [Lebanon](https://apptail.io/app/gretio-XdQd/lebanon) - [Lithuania](https://apptail.io/app/gretio-XdQd/lithuania) - [Luxembourg](https://apptail.io/app/gretio-XdQd/luxembourg) - [Latvia](https://apptail.io/app/gretio-XdQd/latvia) - [Madagascar](https://apptail.io/app/gretio-XdQd/madagascar) - [North Macedonia](https://apptail.io/app/gretio-XdQd/north-macedonia) - [Mali](https://apptail.io/app/gretio-XdQd/mali) - [Macao SAR China](https://apptail.io/app/gretio-XdQd/macau) - [Mauritius](https://apptail.io/app/gretio-XdQd/mauritius) - [United Arab Emirates](https://apptail.io/app/gretio-XdQd/united-arab-emirates) - [Malaysia](https://apptail.io/app/gretio-XdQd/malaysia) - [Namibia](https://apptail.io/app/gretio-XdQd/namibia) - [Nigeria](https://apptail.io/app/gretio-XdQd/nigeria) - [Netherlands](https://apptail.io/app/gretio-XdQd/netherlands) - [Norway](https://apptail.io/app/gretio-XdQd/norway) - [Oman](https://apptail.io/app/gretio-XdQd/oman) - [Philippines](https://apptail.io/app/gretio-XdQd/philippines) - [Pakistan](https://apptail.io/app/gretio-XdQd/pakistan) - [Russia](https://apptail.io/app/gretio-XdQd/russia) - [Sweden](https://apptail.io/app/gretio-XdQd/sweden) - [Singapore](https://apptail.io/app/gretio-XdQd/singapore) - [Senegal](https://apptail.io/app/gretio-XdQd/senegal) - [Suriname](https://apptail.io/app/gretio-XdQd/suriname) - [Türkiye](https://apptail.io/app/gretio-XdQd/turkey) - [Taiwan](https://apptail.io/app/gretio-XdQd/taiwan) - [Mexico](https://apptail.io/app/gretio-XdQd/mexico) - [Armenia](https://apptail.io/app/gretio-XdQd/armenia) - [Slovakia](https://apptail.io/app/gretio-XdQd/slovakia) - [British Virgin Islands](https://apptail.io/app/gretio-XdQd/british-virgin-islands) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends. - [Search Apps](https://apptail.io) - [Top Charts](https://apptail.io/top-iphone-apps) - [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer) *Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*