# Gretio vs RSR Alignment App

The clearest difference is review sentiment: Gretio at 72% against RSR Alignment App's 0%. Gretio also leads on rating (3.9 vs 3.0) and update cadence (every 3 weeks vs every 3 months). RSR Alignment App's advantage is in-app purchases (none vs 4) and iOS requirement (11.0 vs 18.0). 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. RSR Alignment App asks for nothing beyond the download.

Gretio holds the better App Store score, 3.9 against 3.0. That said, the two scores are not equally well evidenced: Gretio has 22 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 72% of Gretio's written reviews are positive against 0% of RSR Alignment App's.

Gretio ships an update every 3 weeks, RSR Alignment App every 3 months. The most recent releases landed on August 15, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Gretio | RSR Alignment App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (22 ratings)](https://appshunter.io/ios/app/gretio/id1498320180/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/rsr-alignment-app/id1503116170/reviews) |
| Number of ratings | **22** | 2 |
| Positive reviews | **72.2% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 40 MB | 57 MB |
| Requires iOS | 18.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Surreal Development LLC](https://appshunter.io/developer/1498320179) | [TMC CO.,LTD](https://appshunter.io/developer/920283832) |

## 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 |


### RSR Alignment App

[App page](https://appshunter.io/ios/app/rsr-alignment-app/id1503116170)

Measure camber and toe angles using your smartphone. The app displays angles for all four corners, allows zero point adjustment, and stores measurement data for later reference. It also lets you change the measurement interval.

**Highlights:** Measure camber angle, Measure toe angle, Display four-corner angles, Zero point adjustment, Store measurement data, Change measurement interval

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Gretio free?

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

### Is RSR Alignment App free?

RSR Alignment App is free to download, with no in-app purchases.

### Which has better reviews, Gretio or RSR Alignment App?

Gretio is rated higher. Gretio averages 3.9 out of 5 from 22 ratings, while RSR Alignment App averages 3.0 from 2 ratings.

### Do Gretio or RSR Alignment App have ads?

Neither Gretio nor RSR Alignment App shows ads.

### Which is updated more often, Gretio or RSR Alignment App?

Gretio ships an update every 3 weeks, and RSR Alignment App every 3 months. Most recently, Gretio was updated on August 15, 2026 and RSR Alignment App on June 11, 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.*