# Root Cause Mechanic — OBD2 scanner & fault codes

> OBD2 scanner & fault codes (iPhone/iPad app by Root Cause Mechanic LLC.)

- Source: https://appshunter.io/ios/app/root-cause-mechanic/id6796144016 (this page in markdown: same URL + `.md`)
- Developer: [Root Cause Mechanic LLC](https://appshunter.io/developer/6796144018)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: American English
- Released: 2026-09-10
- Data updated: 2026-09-11
- User reviews in markdown: https://appshunter.io/ios/app/root-cause-mechanic/id6796144016/reviews.md

## What is Root Cause Mechanic?

Know what's actually wrong before you pay to fix it.

Root Cause Mechanic plugs into your car through any standard Bluetooth OBD-II adapter and turns what your engine is doing into an answer you can act on.

Most code readers hand you a number and a guess. This one runs an actual diagnostic process: it reads live engine data while you drive, asks what you're experiencing, and works out which explanations the evidence supports — and which it rules out.

What you get
• Plain-English fault codes — 663 of them, offline
• Live engine data captured over a real drive, not a single snapshot
• Ranked explanations with the reasoning shown
• A don't-buy list: parts the evidence says you do NOT need
• Recall lookups and a maintenance schedule for your exact vehicle
• VIN scanning by camera

No proprietary hardware. Works with any standard Bluetooth OBD-II adapter (about $20). Nothing is locked to us, and we take no commission on parts or repairs.

Try it before you buy an adapter. The showroom vehicle replays a real, documented case end to end so you can see exactly how it reasons.

Root Cause Mechanic is a second opinion to help you ask better questions. It doesn't replace a qualified mechanic's inspection.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://rcmechanic.shop/privacy/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Household - 3 Vehicles | $149.00 | per year |
| Single Vehicle | $99.00 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Single Second-Opinion | $14.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-09-10

No release notes.

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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 2026-09-11.*