# DERATE: Truck Fault Codes — Read the code. Keep driving.

> Read the code. Keep driving. (iPhone/iPad app by VARGER GROUP LLC.)

- Source: https://appshunter.io/ios/app/derate-truck-fault-codes/id6804848638 (this page in markdown: same URL + `.md`)
- Developer: [VARGER GROUP LLC](https://appshunter.io/developer/6804848640)
- Category: Business, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.5 · 69 MB
- Languages: American English, European Spanish
- Released: 2026-09-24
- Data updated: 2026-10-14

## What is DERATE?

DERATE turns a photo of your dashboard — or of the shop's scanner screen — into a straight answer.

Point the camera at the warning lights or at the code on the screen. DERATE reads it and tells you:

• What the code actually means, in plain language
• Whether you can keep driving, and how long before the engine derates
• The most likely root cause
• The checks to run, in the order that saves the most time
• A work order you can hand to the shop

Works with SPN/FMI codes and OEM codes from Cummins, Freightliner, Paccar, Volvo, International and Detroit.

BUILT FOR THE ROADSIDE
Big type, high contrast, readable in direct sunlight with gloves on. Bilingual — English and Spanish, switched from Settings or detected from your phone.

WHO IT IS FOR
Owner-operators and drivers who need to know right now whether the load still moves. Shops that want the diagnosis and the work order before the truck is on the lift.

PLANS
• Rescue — one full diagnostic, one-time payment
• Driver — unlimited diagnostics, weekly or monthly
• Shop — unlimited diagnostics for the whole shop, monthly or yearly

DERATE is a diagnostic assistant. It does not replace a certified technician, and it is not a repair authorization.

—
SUBSCRIPTION DETAILS
DERATE Driver and DERATE Shop are auto-renewable subscriptions. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions in your Apple Account settings after purchase.

Terms of Use: https://derate.app/terms
Privacy Policy: https://derate.app/privacy

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Shop - Yearly | $990.00 | per year |
| Shop - Monthly | $99.00 | per month |
| Driver - Monthly | $19.99 | per month |
| Driver - Weekly | $8.99 | per 7 days |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Rescue - 1 Diagnosis | $19.99 | one-time |


## Is DERATE safe?

Not enough ratings yet to assess DERATE.

## Is DERATE legit?

DERATE: Truck Fault Codes has limited verification signals. The AppsHunter Legitimacy Score for DERATE is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.1 — 2026-09-25

• Print or share the work order as a PDF
• Listen to the diagnosis out loud, even with the phone on silent
• Faster buttons with tap feedback
• After you subscribe, you go straight into your plan
• Full English and Spanish support

### 1.0 — 2026-09-24

No release notes.

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## Related topics

[mercedes truck fault codes](https://appshunter.io/ios/topics/mercedes-truck-fault-codes) · [fault codes](https://appshunter.io/ios/topics/fault-codes) · [truck customizer](https://appshunter.io/ios/topics/truck-customizer)

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*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 2026-10-14.*