# CSMT vs Service Flex

The clearest difference is ratings volume: CSMT at 450 against Service Flex's 6. Service Flex's advantage is monetization model (free vs ad-supported). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.6 for CSMT against 4.7 for Service Flex. That said, the two scores are not equally well evidenced: CSMT has 450 ratings behind it against 6, so its average is the more settled of the two.

CSMT ships an update every 3 months, Service Flex every 4 months. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | CSMT | Service Flex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (450 ratings)](https://appshunter.io/ios/app/csmt-certified-service/id665252466/reviews) | **[4.7 (6 ratings)](https://appshunter.io/ios/app/service-flex-technician/id6475359821/reviews)** |
| Number of ratings | **450** | 6 |
| Positive reviews | 18.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Ad-supported | **Free** |
| Size | 91 MB | 33 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [General Motors Company](https://appshunter.io/developer/369362515) | [The Reynolds and Reynolds Company and its affiliates](https://appshunter.io/developer/411454098) |

## 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


### Service Flex

[App page](https://appshunter.io/ios/app/service-flex-technician/id6475359821)

Streamline routine tasks for automotive technicians directly from a mobile device. This app facilitates multi-point inspections and links pending services to repair orders, enhancing efficiency within a dealership's service department.

**Highlights:** Complete multi-point inspections, Tie pending services to RO, Forced march process, Mobile task completion, Part of Reynolds Retail Management System

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

**In-app purchases:** none


## Frequently asked questions

### Is CSMT free?

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

### Is Service Flex free?

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

### Which has better reviews, CSMT or Service Flex?

Service Flex is rated higher. CSMT averages 4.6 out of 5 from 450 ratings, while Service Flex averages 4.7 from 6 ratings.

### Do CSMT or Service Flex have ads?

Neither CSMT nor Service Flex shows ads.

### Which is updated more often, CSMT or Service Flex?

CSMT ships an update every 3 months, and Service Flex every 4 months. Most recently, CSMT was updated on November 6, 2026 and Service Flex on November 4, 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.*