# Autmet | OBD2 Scanner vs ProMasters Only

The clearest difference is price: Autmet | OBD2 Scanner at Free against ProMasters Only's $69.99. Autmet | OBD2 Scanner also leads on rating (5.0 vs 4.5) and update cadence (every 9 days vs every 7 months). ProMasters Only's advantage is ratings volume (21 vs 1). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Autmet | OBD2 Scanner is free to download; ProMasters Only costs $69.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Autmet | OBD2 Scanner holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: ProMasters Only has 21 ratings behind it against 1, so its average is the more settled of the two.

Autmet | OBD2 Scanner ships an update every 9 days, ProMasters Only every 7 months. Both last shipped on October 30, 2026.

## The numbers

| Metric | Autmet | OBD2 Scanner | ProMasters Only |
| --- | --- | --- |
| Price | **Free** | $69.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/autmet-obd2-scanner/id6504313001/reviews)** | [4.5 (21 ratings)](https://appshunter.io/ios/app/promasters-only/id6737483353/reviews) |
| Number of ratings | 1 | **21** |
| Positive reviews | — | 78.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 7 months |
| Monetization | **Free** | Paid |
| Size | 50 MB | 27 MB |
| Requires iOS | 16.6 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [SPIRESH](https://appshunter.io/developer/1751680802) | [Kip Amore](https://appshunter.io/developer/1776662732) |

## What reviewers say

### Autmet | OBD2 Scanner

[App page](https://appshunter.io/ios/app/autmet-obd2-scanner/id6504313001)

This diagnostic tool connects to your vehicle's OBD data via a Bluetooth device. It allows you to read various ECU data and supports common OBD-II protocols.

**Highlights:** Reads vehicle ECU data, Bluetooth OBD device compatible, Supports OBD-II protocols, Diagnostic tool

**In-app purchases:** none


### ProMasters Only

[App page](https://appshunter.io/ios/app/promasters-only/id6737483353)

This app provides diagnostic tools and information specifically for Ram ProMaster vans. It offers real-time gauge monitoring, trouble code explanations, and a repair log, requiring a separate OBD dongle purchase.

**Highlights:** Trouble code reader with explanations, Real-time gauge monitoring (Voltage, Oil Pressure, Coolant Temp, etc.), Transmission fluid temperature gauge, Oil change and repair log book, Repair shop finder, Technical library with videos, Fluids and consumables specifications

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

**In-app purchases:** none


## Frequently asked questions

### Is Autmet | OBD2 Scanner free?

Autmet | OBD2 Scanner is free to download, with no in-app purchases.

### Is ProMasters Only free?

ProMasters Only costs $69.99, with no in-app purchases.

### Which has better reviews, Autmet | OBD2 Scanner or ProMasters Only?

Autmet | OBD2 Scanner is rated higher. Autmet | OBD2 Scanner averages 5.0 out of 5 from 1 ratings, while ProMasters Only averages 4.5 from 21 ratings.

### Do Autmet | OBD2 Scanner or ProMasters Only have ads?

Neither Autmet | OBD2 Scanner nor ProMasters Only shows ads.

### Which is updated more often, Autmet | OBD2 Scanner or ProMasters Only?

Autmet | OBD2 Scanner ships an update every 9 days, and ProMasters Only every 7 months. Most recently, Autmet | OBD2 Scanner was updated on October 30, 2026 and ProMasters Only on October 30, 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.*