# Gretio vs McElroy Operator

The clearest difference is rating: McElroy Operator at 5.0 against Gretio's 3.8. McElroy Operator also leads on in-app purchases (none vs 4) and update cadence (every 3 days vs fortnightly). Gretio's advantage is ratings volume (23 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Gretio sells 4 in-app purchases, starting at $19.99 per year. McElroy Operator asks for nothing beyond the download.

McElroy Operator holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Gretio has 23 ratings behind it against 1, so its average is the more settled of the two.

Gretio ships an update fortnightly, McElroy Operator every 3 days. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Gretio | McElroy Operator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (23 ratings)](https://appshunter.io/ios/app/gretio/id1498320180/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mcelroy-operator/id6802817566/reviews)** |
| Number of ratings | **23** | 1 |
| Positive reviews | 72.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 41 MB | 19 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Surreal Development LLC](https://appshunter.io/developer/1498320179) | [McElroy Manufacturing, Inc.](https://appshunter.io/developer/376891711) |

## What reviewers say

### Gretio

[App page](https://appshunter.io/ios/app/gretio/id1498320180)

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.

**Highlights:** Advanced diagnostic functions, Analyze thousands of data points, Look up diagnostic trouble codes, Perform advanced service functions, Exclusive for General Motors vehicles

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gretio All Access | $19.99 | per year |
| Gretio RPO Pack 1 | $29.99 | one-time |
| Gretio RPO Pack 2 | $29.99 | one-time |
| RPO Pack 3 | $29.99 | one-time |


### McElroy Operator

[App page](https://appshunter.io/ios/app/mcelroy-operator/id6802817566)

This app provides certified operators with easy access to their professional profiles, including qualifications and certifications. It also allows viewing summaries of joint reports and features a QR code for logging into the McElroy Data Logger.

**Highlights:** Operator profile access, View certifications, Access joint report summaries, QR code for Data Logger login

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Gretio free?

Gretio is free to download, with in-app purchases available.

### Is McElroy Operator free?

McElroy Operator is free to download, with no in-app purchases.

### Which has better reviews, Gretio or McElroy Operator?

McElroy Operator is rated higher. Gretio averages 3.8 out of 5 from 23 ratings, while McElroy Operator averages 5.0 from 1 ratings.

### Do Gretio or McElroy Operator have ads?

Neither Gretio nor McElroy Operator shows ads.

### Which is updated more often, Gretio or McElroy Operator?

Gretio ships an update fortnightly, and McElroy Operator every 3 days. Most recently, Gretio was updated on October 24, 2026 and McElroy Operator on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*