# Gretio vs Gentry Controls

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.

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.

## The numbers

| Metric | Gretio | Gentry Controls |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (22 ratings)](https://appshunter.io/ios/app/gretio/id1498320180/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 72.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 40 MB | 63 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Surreal Development LLC](https://appshunter.io/developer/1498320179) | [Gentry Controls & Consulting LLC](https://appshunter.io/developer/1719797493) |

## 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 |


### Gentry Controls

[App page](https://appshunter.io/ios/app/gentry-controls/id6473788427)

**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 Gentry Controls free?

Gentry Controls is free to download, with no in-app purchases.

### Do Gretio or Gentry Controls have ads?

Neither Gretio nor Gentry Controls shows ads.

### Which is updated more often, Gretio or Gentry Controls?

Gretio ships an update every 3 weeks, and Gentry Controls weekly. Most recently, Gretio was updated on August 15, 2026 and Gentry Controls on September 23, 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.*