---
title: "DiagonalOBDII - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "Diagonal is designed specifically for mechanics who want to simplify and speed up vehicle drive cycles. Instantly track emissions monitors and diagnostic trouble codes (DTCs) live, ensuring accurate d"
---

# DiagonalOBDII — United States
> OBDII Drive Cycle App

![DiagonalOBDII App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/60/cc/cc/60cccc38-3faa-fd40-c157-49c22e2f7a7b/AppIcon-0-0-1x_U007ephone-0-1-85-220.png/434x0w.png)

**Developer:** [Kyle Louderback](https://apptail.io/developer/kyle-louderback-Ajtu)
**Category:** Productivity
**Rating:** 5.0/5 (1 ratings)
**Price:** Free
**Bundle ID:** com.loudyTime.Diagonal
**Store:** Apple App Store
**Country:** United States
**Version:** 2.3.6 (released 2026-08-21)
**Original Release:** 2025-08-07
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6743419784)
**AppTail Page:** [https://apptail.io/app/diagonalobdii-RURw/united-states](https://apptail.io/app/diagonalobdii-RURw/united-states)

## DiagonalOBDII Description
Diagonal is designed specifically for mechanics who want to simplify and speed up vehicle drive cycles. Instantly track emissions monitors and diagnostic trouble codes (DTCs) live, ensuring accurate diagnostics and rapid vehicle readiness for inspection.

Key Features:

-Live Drive Cycle Monitoring: Clearly see the real-time status of emissions monitors as they run, complete, or require further action during your drive.

-Immediate Diagnostics: Quickly identify and address active trouble codes (DTCs) as they appear, eliminating uncertainty during drive cycles.

-Efficiency and Accuracy: Avoid unnecessary repeat drive cycles by verifying real-time monitor completion, ensuring vehicles pass inspection on the first try.

-Precise Drive Cycle Guidance: Monitor essential drive cycle parameters such as speed, RPM, engine temperature, and throttle position to meet exact diagnostic requirements.

-Professional Dashboard: Access all critical information quickly through a clear, easy-to-navigate interface tailored for automotive professionals.

-Instant Code Explanations: Quickly interpret trouble codes with straightforward, mechanic-friendly explanations.

Why Mechanics Trust Diagonal:
-Saves Valuable Time: Complete diagnostic drive cycles accurately the first time.

-Faster Inspections: Immediately identify vehicle readiness to streamline your workflow.

-Reduces Diagnostic Uncertainty: Clear, actionable data presented in real-time.

-Diagonal empowers professional technicians with the tools to perform diagnostics faster and more efficiently than ever before.

Terms of Use: 
Privacy Policy: 

## DiagonalOBDII Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/08/d4/6f/08d46fd1-9c8e-54ac-cd74-1632c4d1aa93/01-brand.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/6d/e5/41/6de54130-c4aa-66bb-8571-20615738987c/04-monitors.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/8b/06/d4/8b06d4e4-3807-20b4-df49-fcc2cb8fdc8c/03-live-data.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/83/99/78/8399789b-53be-9ce9-80f7-3ab46cf9d9be/06-codes.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/10/aa/16/10aa1636-0ea1-f593-ca45-c6cf302d4afb/02-dashboard.png/1284x2778.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/63/a7/04/63a70496-45c5-2807-d9c1-d87406eb5e33/05-drive-cycle.png/1284x2778.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/08/56/e7/0856e738-bd10-75de-c09a-6cccfbc15aea/07-ai-mechanic.png/1284x2778.png)

## DiagonalOBDII Rating Breakdown in United States
- 5 stars: 1 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)


## DiagonalOBDII In-App Purchases
| Item | Price |
|------|-------|
| Shop Owner - Monthly | $17.99 |
| Diagonal Premium Trial | $12.99 |
| Diagonal Premium Yearly | $99.99 |
| Diagonal Premium Monthly | $12.99 |




## DiagonalOBDII Available In
- [United States](https://apptail.io/app/diagonalobdii-RURw/united-states)
- [Bahrain](https://apptail.io/app/diagonalobdii-RURw/bahrain)
- [Canada](https://apptail.io/app/diagonalobdii-RURw/canada)
- [Spain](https://apptail.io/app/diagonalobdii-RURw/spain)
- [Australia](https://apptail.io/app/diagonalobdii-RURw/australia)
- [Italy](https://apptail.io/app/diagonalobdii-RURw/italy)
- [Luxembourg](https://apptail.io/app/diagonalobdii-RURw/luxembourg)
- [United Kingdom](https://apptail.io/app/diagonalobdii-RURw/united-kingdom)

---

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