# Diesel Decoder

> Bluetooth diagnostic tool for heavy commercial vehicles, reading codes and live data. (iPhone/iPad app by Diesel Laptops LLC.)

- Source: https://appshunter.io/ios/app/diesel-decoder/id1529808675 (this page in markdown: same URL + `.md`)
- Developer: [Diesel Laptops LLC](https://appshunter.io/developer/1345401052)
- Category: Reference, Productivity
- Price: Free with in-app purchases
- Rating: 3.30/5 from 30 App Store ratings · 11 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 43 MB
- Languages: American English
- Released: 2020-12-09
- Data updated: 2026-08-24
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/diesel-decoder/id1529808675/reviews.md

## What is Diesel Decoder?

Diesel Decoder is a Bluetooth diagnostics tool for all Heavy Commercial Vehicles, it can be used for reading/clearing Diagnostic Trouble Codes (DTCs), parameters, live data, and running bi-directional commands using the Diesel Decoder hardware (required). Diesel Decoder also allows the user to generate local and cloud based reports that may be viewed, printed, or shared with others via the Diesel Laptops Diesel Health Platform.

## Key features

- Read/clear Diagnostic Trouble Codes (DTCs)
- View live data parameters
- Run bi-directional commands
- Generate local and cloud reports
- Share reports via Diesel Health Platform
- Requires Diesel Decoder hardware

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Decoder Professional Monthly | $29.99 | per month |


## Chart rankings

- #176 in Top Grossing · Reference (US App Store)

## Recent user reviews (10 of 11)

All indexed reviews: https://appshunter.io/ios/app/diesel-decoder/id1529808675/reviews.md

### 1/5 — We can’t use this device

*2026-03-29*

Every time said Password device we just lost 350$ bought this device

### 1/5 — Last version terrible

*2026-02-10*

The latest version of the software is not usable for working with PACCAR.
Before this update, I was always satisfied with it and never had any issues. Now it has become extremely difficult to use.

Fault codes are much harder to read and understand than before.
Previously, there were never any problems starting a regen or clearing a derate. Now it is almost impossible to do.

My assessment: the only reasonable option is to unsubscribe and throw the device away.

### 1/5 — No regen

*2025-09-19*

Assuming most of the people want to be able to do regen, don't bother with this. Not working even with subscription, at least for Volvo trucks

### 1/5 — Waste of money

*2025-07-15*

In a true repair shop environment this tool is useless.  Once they charge 30.00 a month for Regen access this thing is a paperweight for my to do list.   That’s right 350.00 for a paperweight.  Find something that works as described with no subscription

### 5/5 — Not Performing or Scanning Solution

*2025-03-23*

Product Amazing Customer Support Horrible

### 2/5 — It’s ok

*2025-02-25*

To read codes and other data its ok but I bought this to do regens even after buying the “subscription “ to do so $30 a month it does not let you

### 2/5 — Don’t work any more. Login fail

*2024-07-28*

Was working couple of months correct. Now asking for login. All attempts failed. Was trying Apple ID and email.  “”PostConfirmation invocation failed due to error Socket timeout while invoking Lambda function””

### 1/5 — Sneaky manipulative tactics

*2024-05-15*

When i first bought the product on Amazon they charged me $350 dollars one time payment to be able to do def regens and other resets for my truck. Now however they have implemented a $30 dollars a month mandatory fee to use the regen service. These guys are losers and this is a total rip off. I wouldnt have had payed $350 then, why lie to us and claim its free to use when later you will make us have to pay a $30 month subscription fee ?

### 1/5 — Diesel Decoder

*2024-03-06*

aftermarket box no manual or instruction adopter doesn’t work RGEN is not available

### 5/5 — Great diagnostic tool

*2023-03-10*

I’m out of NJ and the dealer wants 300 just to scan the truck . So far I’ve used this unit on a 2013 international with maxxforce 13 engine. I force regenerated it with the this app and plug in module after fixing a dpf pressure sensor that the app said it most likely the cause of the code. After it reads the code you can click on how to fix and it will give you detailed instructions on how to fix with wire schematics and all. After the forced regen everything worked great. I also used in. A 2014 kenworth t800 with Cummins I think it’s an x15 . I forced a regen with that one too and fixed the problem . The module monitors all temps so it’s a very useful tool to have. I also tried it in my 2016 cat truck to see if it would link up and it does. Thankfully it doesn’t have any engine lights on right now but it’s only a matter of time. Jay NJ

## Frequently asked questions about Diesel Decoder

### What is Diesel Decoder?

Diesel Decoder is a Bluetooth diagnostic tool designed for heavy commercial vehicles. It allows users to read and clear Diagnostic Trouble Codes (DTCs), view live data, and execute bi-directional commands, but requires the separate Diesel Decoder hardware.

### Does Diesel Decoder have ads?

Yes, Diesel Decoder contains advertisements. As a free application, it utilizes ads to support its development and distribution.

### What is the pricing for Diesel Decoder?

The Diesel Decoder app itself is free to download. However, it requires the purchase of Diesel Decoder hardware and offers a 'Decoder Professional Monthly' subscription for $29.99/month with a 2-month free trial.

### What devices does Diesel Decoder support?

Diesel Decoder is available for iPhone and iPad devices. It is designed to work with Apple's iOS operating system.

### How often is Diesel Decoder updated?

The latest version of Diesel Decoder is 5.2.1, last updated on March 27, 2026. This indicates a relatively active development cycle for the application.

### What is the age rating for Diesel Decoder?

Diesel Decoder has an age rating of 4+. This means it is considered suitable for users aged 4 and above, with no mature content.

### What are the benefits of the Diesel Health Platform?

The Diesel Health Platform allows users to generate and store reports locally or in the cloud. These reports can then be easily viewed, printed, or shared with others, facilitating better vehicle health management.

### Can I use Diesel Decoder without the hardware?

No, Diesel Decoder requires the specific Diesel Decoder hardware to function. The app acts as an interface to communicate with the vehicle's diagnostic systems through this hardware.

## Version history (last 5 releases)

### 5.3.1 — 2026-07-21

Bugfix: Fixed an issue where failed password management causes connection interruption issue.

### 5.3.0 — 2026-06-24

New Features
- Key-on reminder prompts you to confirm the key is on before scanning to help avoid incomplete reads
- New message bar on the main screen surfaces important status updates at a glance
- Feedback prompt will occasionally ask for your input to help us improve the app

Improvements
- Overhauled device connection flow for more reliable pairing and fewer intermittent issues
- Refreshed settings screen with a cleaner layout and better organization
- Large log files are now automatically compressed before emailing so they send without hitting size limits

Bug Fixes
- Fixed home screen layout where an ad was overlapping a menu item
- Fixed J1708 message parameters not displaying correctly

### 5.2.1 — 2026-03-27

- Fixed report not configuring properly 
- Fixed IOS view/share issue for report
- Fixed issue with intermittent firmware updates

### 5.1.0 — 2026-03-17

- Improved Bluetooth connectivity and overall stability
- Expanded diagnostic trouble code (DTC) reporting and added proprietary PACCAR codes
- Added component descriptions to improve diagnostics
- New setting to display generic fault codes
- Font size fix for better readability
- Added vehicle info to reporting
- Multiple bug fixes and performance improvements

### 5.0.0 — 2026-01-19

- Improved app stability and performance with a new framework
- Automatic vehicle reconnection and scanning after first use
- New, easy-to-read PDF reports with in-app email sharing
- Live data preset filters for faster access to key vehicle data
- Improved fault code support for Detroit, PACCAR, and Volvo
- Multiple bug fixes and performance improvements

## Apps similar to Diesel Decoder

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [NAPA Filters](https://appshunter.io/ios/app/napa-filters/id6477851966) | 5.0 (2) | Free | Reference |
| [VIN Number Check and Decoder](https://appshunter.io/ios/app/vin-number-check-and-decoder/id6453521662) | — | Free | Reference |
| [NaviGates](https://appshunter.io/ios/app/navigates/id1498404340) | 1.9 (21) | Free | Reference |
| [Counteract Balancing](https://appshunter.io/ios/app/counteract-balancing/id6450926563) | 1.0 (2) | Free | Reference |
| [Freightliner Smart Source](https://appshunter.io/ios/app/freightliner-smart-source/id966314430) | 3.3 (18) | Free | Reference |

## More apps by Diesel Laptops LLC

- [Diesel VIN](https://appshunter.io/ios/app/diesel-vin/id1454244763)
- [Diesel Parts](https://appshunter.io/ios/app/diesel-parts/id1537445966)
- [Diesel Repair Mobile](https://appshunter.io/ios/app/diesel-repair-mobile/id6599861426)

All apps by Diesel Laptops LLC: https://appshunter.io/developer/1345401052

## Related topics

[diesel decoder](https://appshunter.io/ios/topics/diesel-decoder) · [diesel repair](https://appshunter.io/ios/topics/diesel-repair) · [diesel laptops](https://appshunter.io/ios/topics/diesel-laptops) · [diesel repair mobile](https://appshunter.io/ios/topics/diesel-repair-mobile) · [mechanic diesel](https://appshunter.io/ios/topics/mechanic-diesel)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*