# Ultimate Diesel Builders Guide vs RAM®

The clearest difference is in-app purchases: RAM® at none against Ultimate Diesel Builders Guide's 12. RAM® also leads on ratings volume (95K vs 8) and update cadence (monthly vs every 3 months). Ultimate Diesel Builders Guide's advantage is iOS requirement (10.0 vs 14.0). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Ultimate Diesel Builders Guide sells 12 in-app purchases, starting at $7.99 per 6 months. RAM® asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Ultimate Diesel Builders Guide against 4.8 for RAM®. That said, the two scores are not equally well evidenced: RAM® has 95K ratings behind it against 8, so its average is the more settled of the two. Written reviews are what separate them: 33% of Ultimate Diesel Builders Guide's written reviews are positive against 31% of RAM®'s.

Ultimate Diesel Builders Guide ships an update every 3 months, RAM® monthly. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Ultimate Diesel Builders Guide | RAM® |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (8 ratings)](https://appshunter.io/ios/app/ultimate-diesel-builders-guide/id633616911/reviews)** | [4.8 (95K ratings)](https://appshunter.io/ios/app/ram/id1565972415/reviews) |
| Number of ratings | 8 | **95K** |
| Positive reviews | **33.3% of reviews** | 31.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 39 MB | 287 MB |
| Requires iOS | **10.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Engaged Media Inc.](https://appshunter.io/developer/1456235175) | [FCA US LLC](https://appshunter.io/developer/384850200) |

## What reviewers say

### Ultimate Diesel Builders Guide

[App page](https://appshunter.io/ios/app/ultimate-diesel-builders-guide/id633616911)

This digital magazine provides expert tips and tricks for building powerful, fuel-efficient diesel trucks. Discover the latest parts and technology to enhance your vehicle's performance and towing capabilities.

**Highlights:** Diesel truck building tips and tricks, Performance and fuel economy advice, Towing performance enhancement, Truck parts shopping guide, Latest power products and technology, Digital magazine subscription

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ultimate Diesel Builder's Guide | $7.99 | per 6 months |
| Ultimate Diesel Builder's Guide Auto-Renewable Subscription | $12.99 | per year |
| Ultimate Diesel Builder's Guide | $12.99 | per year |
| UDBG 2012 Ultimate Diesel ... | $3.99 | one-time |
| UDBG 2013 Ultimate Diesel ... | $3.99 | one-time |
| FALL 2013 Ultimate Diesel ... | $3.99 | one-time |
| August/September 2014 | $3.99 | one-time |
| February-March 2014 | $3.99 | one-time |
| October/November 2014 | $3.99 | one-time |
| April-May 2014 | $5.99 | one-time |
| December-January 2017 | $5.99 | one-time |
| Ultimate Diesel Builder's Guide 4 Back Issue Bundle | $9.99 | one-time |


### RAM®

[App page](https://appshunter.io/ios/app/ram/id1565972415)

Manage your Ram vehicle remotely, access owner information, and stay updated on recalls. Schedule service, contact your dealer, and enjoy enhanced convenience and peace of mind.

**Highlights:** Remote start/stop, Lock/unlock doors, Horn/lights activation, Dealer contact and scheduling, Vehicle info access, Recall alerts, Owner's manual

**Features:** Apple Watch app

**In-app purchases:** none

**What reviewers like**

- ⭐ Awesome app and always works!
- 🚀 Works perfect in bed start at -50
- 👍 New to this App, testing all services
- 👍 Seems to be pretty good so far

**What reviewers complain about**

- 🐛 Pretty lame, constantly shows wrong location
- 🐛 Garbage unresponsive App, geo fences reset
- 💰 Rip off, everything requires subscription
- 🐛 App won't load vehicle, can't connect
- 🐛 Nothing works, very slow

**Reported bugs**

- Face ID keeps deactivating
- Fuel level, tire pressure not updating
- Remote start/unlock often fails
- Can't add vehicle to app, says not found
- Constantly logs out, password issues

**Requested features**

- Show if engine is running, notify when it shuts off
- Add ability to roll windows up/down
- Add scheduled remote start option
- Add Siri integration for remote commands
- Add quick actions for common functions


## Frequently asked questions

### Is Ultimate Diesel Builders Guide free?

Ultimate Diesel Builders Guide is free to download, with in-app purchases available.

### Is RAM® free?

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

### Which has better reviews, Ultimate Diesel Builders Guide or RAM®?

Ultimate Diesel Builders Guide is rated higher. Ultimate Diesel Builders Guide averages 4.9 out of 5 from 8 ratings, while RAM® averages 4.8 from 95K ratings.

### Do Ultimate Diesel Builders Guide or RAM® have ads?

Neither Ultimate Diesel Builders Guide nor RAM® shows ads.

### Which is updated more often, Ultimate Diesel Builders Guide or RAM®?

Ultimate Diesel Builders Guide ships an update every 3 months, and RAM® monthly. Most recently, Ultimate Diesel Builders Guide was updated on October 23, 2026 and RAM® on October 25, 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.*