Gretio vs Gentry Controls
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gretio
This app enables advanced vehicle diagnostics and service functions for General Motors vehicles using an OBDLINK MX+ device. It analyzes data points, looks up trouble codes, and performs service procedures like DPF regenerations.
- Advanced diagnostic functions
- Analyze thousands of data points
- Look up diagnostic trouble codes
- Perform advanced service functions
- Exclusive for General Motors vehicles
Read full descriptionHide full description
Use Gretio with an OBDLINK MX+ to perform advanced diagnostic functions on your diesel, gas, electric, or hybrid 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, Drive Motor Control Modules, Battery Energy Control modules, Body Control Module, Radio, and many 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.
Gentry Controls
Read full descriptionHide full description
Easy, secure, real-time, and historical access to your Gentry Controls products and systems from anywhere on any device. Keep an eye on how things are running even when you're not there. * Requires active remote access service from Gentry Controls.
Screenshots
Verdict
The clearest difference is in-app purchases: Gentry Controls at none against Gretio's 4. Gentry Controls also leads on update cadence (weekly vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Gretio sells 4 in-app purchases, starting at $19.99 per year. Gentry Controls asks for nothing beyond the download.
Gretio ships an update every 3 weeks, Gentry Controls weekly. The most recent releases landed on August 15, 2026 and September 23, 2026 respectively.
| Parameter | Gretio | Gentry Controls |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (22 ratings) — better | — |
| Positive reviews | 72.2% of reviews | — |
| Number of ratings | 22 — better | — |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 40 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | Surreal Development LLC | Gentry Controls & Consulting LLC |
In-app purchases
Gretio
- Gretio All Access$19.991 Year
- Gretio RPO Pack 1$29.99
- Gretio RPO Pack 2$29.99
- RPO Pack 3$29.99
Gentry Controls
No in-app purchases
