# CSMT vs Linear Access Control App

The clearest difference is rating: CSMT at 4.6 against Linear Access Control App's 1.0. CSMT also leads on update cadence (every 3 months vs every 30 months) and ratings volume (450 vs 2). Linear Access Control App's advantage is monetization model (free vs ad-supported). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CSMT holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: CSMT has 450 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 18% of CSMT's written reviews are positive against 0% of Linear Access Control App's.

CSMT ships an update every 3 months, Linear Access Control App every 30 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | CSMT | Linear Access Control App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (450 ratings)](https://appshunter.io/ios/app/csmt-certified-service/id665252466/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/linear-access-control-app/id1558186542/reviews) |
| Number of ratings | **450** | 2 |
| Positive reviews | **18.2% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 30 months |
| Monetization | Ad-supported | **Free** |
| Size | 91 MB | 35 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [General Motors Company](https://appshunter.io/developer/369362515) | [Nice North America LLC](https://appshunter.io/developer/656335127) |

## What reviewers say

### CSMT

[App page](https://appshunter.io/ios/app/csmt-certified-service/id665252466)

This mobile tool assists General Motors dealer service personnel with various tasks. It allows for pre-authorization of repairs, efficient part returns using photos, and submission of detailed reports. Users can also look up vehicle recalls and access the Service Workbench.

**Highlights:** Pre-authorize warrantable repairs, Photo-assisted part return process, Submit part information for traceability, Submit detailed field product reports, Lookup and view vehicle recalls, Access Service Workbench

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Handy tool for service department
- 👍 Easy to use
- 👍 Direct feedback to GM
- 👍 Great tool for RPT submission

**What reviewers complain about**

- 🔋 Significant battery drain
- 🐛 App is very buggy
- 🐛 Cannot log in
- 🐛 App is trash
- 🐛 App never sends email

**Reported bugs**

- Battery drain since app download
- Incompatible with older iOS versions
- Cannot log in after Microsoft entry
- App never sends email
- Login broken after update

**Requested features**

- Allow choosing mail app for submission
- Submit without using email
- Allow submission using phone's internet
- Improve video application functionality
- Allow submitting more than one part at a time


### Linear Access Control App

[App page](https://appshunter.io/ios/app/linear-access-control-app/id1558186542)

This app allows your iPhone to function as an electronic access credential for systems with compatible readers. Download, manage, and use your mobile access credentials securely, eliminating the need for physical cards. It leverages your smartphone's built-in security features for enhanced protection.

**Highlights:** iPhone as electronic access credential, No sensitive personal information disclosure, Eliminates physical access credentials, Leverages smartphone security, Stores multiple access credentials, Color-coded credential labels

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CSMT free?

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

### Is Linear Access Control App free?

Linear Access Control App is free to download, with no in-app purchases.

### Which has better reviews, CSMT or Linear Access Control App?

CSMT is rated higher. CSMT averages 4.6 out of 5 from 450 ratings, while Linear Access Control App averages 1.0 from 2 ratings.

### Do CSMT or Linear Access Control App have ads?

Neither CSMT nor Linear Access Control App shows ads.

### Which is updated more often, CSMT or Linear Access Control App?

CSMT ships an update every 3 months, and Linear Access Control App every 30 months. Most recently, CSMT was updated on October 29, 2026 and Linear Access Control App on October 24, 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.*