# American V-Twin Diagnostics — V-Twin Diagnostics & Records > V-Twin motorcycle diagnostic tool with guided troubleshooting and repair information. (iPhone/iPad app by Matthew Griffin.) - Source: https://appshunter.io/ios/app/american-v-twin-diagnostics/id6765979058 (this page in markdown: same URL + `.md`) - Developer: [Matthew Griffin](https://appshunter.io/developer/1896149286) - Category: Utilities, Productivity - Price: Free with in-app purchases - Rating: 5.00/5 from 4 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 15.1 · 46 MB - Languages: English - Released: 2026-05-06 - Data updated: 2026-07-10 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/american-v-twin-diagnostics/id6765979058/reviews.md ## What is American V? Your Harley is down. The dealer wants $300 just to look at it — and that's before a single wrench turns. Riding season doesn't wait, and neither should you. Here's what a dealership diagnostic actually costs you: Towing to the shop $300 – $500 Diagnostic inspection fee $90 – $300 Shop labor rate $160 – $190hr Total before any repair $500 – $1,000+ Wait time Days to weeks American V-Twin Diagnostics gives you the same systematic, circuit-by-circuit diagnostic process a trained Harley technician uses — for the cost of one month's subscription. Know exactly what's wrong before you ever call a shop. Walk in informed, not at their mercy. Unlike Bluetooth scan tools that spit out a code and leave you stranded, this app tells you what the code means, what circuit to test, and exactly what to do next. It's the difference between knowing and guessing — and the difference between a $10 fix and a $1,000 misdiagnosis. —————————————— FREE — NO SUBSCRIPTION REQUIRED —————————————— Circuit Wiring Diagrams — All 12 EFI and mechanical systems with component locations, wire colors, and connector pinouts DTC Code Lookup — 52 diagnostic trouble codes explained in plain English with probable causes and recommended fixes Torque Specifications — 98 specs for Twin Cam 88/96/103/110 and Sportster Evolution 883/1200 engines Service Intervals — Mileage-based maintenance schedules for Delphi EFI models Bike Selector & Specs — 80+ supported sub-models with motor-specific details —————————————— PREMIUM — 3-DAY FREE TRIAL, THEN $9.99/MONTH —————————————— Guided Diagnostic Paths — 12 proprietary step-by-step decision trees for every major system: ignition, fuel, starter, sensors, security, ECM, brakes, suspension, steering, clutch, and more. Each path adapts to your test results and narrows down the root cause — no guesswork, no wasted parts. Mechanic's Checklist — A comprehensive Delphi EFI health assessment with pass/fail grading, measurement fields, and a printable PDF — the same structured inspection a pro shop would charge you $150 to perform. Motorcycle Garage — Save up to 3 bike profiles with full specs, mileage tracking, and service history PDF Diagnostic Reports — Generate branded, shareable reports with circuit diagrams, findings, and recommended actions Service Records & Notes — Log every service and store notes per bike Diagnostic History — Every completed diagnostic saved and reviewable —————————————— BUILT FOR YOUR SPECIFIC BIKE —————————————— Select your exact year, model, and engine — Sportster, Dyna, Softail, Touring, or CVO — and the app filters everything to your platform. Twin Cam and Evolution Sportster diagnostics are handled separately. Magneti Marelli EFI models are flagged automatically. No hardware. No dongle. No adapter. Just your phone and your motorcycle. Download American V-Twin Diagnostics. Diagnose it yourself — before you hand over the keys and the cash. Terms of Use: https://vtwindiagnostics.com/terms Privacy Policy: https://vtwindiagnostics.com/privacy-policy ## Key features - Circuit wiring diagrams - DTC code lookup and explanation - Torque specifications - Service intervals - Guided diagnostic paths - Mechanic's checklist - Motorcycle garage and service records ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | V-Twin Premium | $9.99 | per month | ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/american-v-twin-diagnostics/id6765979058/reviews.md ### 5/5 — Better that expected *2026-05-15* Damn this app is impressive! Figured out what the dealership missed, wish I found this app before I wasted all that money. ### 5/5 — Useful *2026-05-09* Great tool, very useful. I have multiple bikes and this helps me keep track of everything. Diag tool is very handy. ## Frequently asked questions about American V ### What V-Twin motorcycles does American V-Twin Diagnostics support? American V-Twin Diagnostics supports over 80 sub-models, including Sportster, Dyna, Softail, Touring, and CVO models. It specifically handles Twin Cam and Evolution Sportster diagnostics and flags Magneti Marelli EFI models. ### How much does American V-Twin Diagnostics cost? The app offers a free tier with essential diagnostic information. Premium features, including guided diagnostic paths and detailed reports, are available through a subscription for $9.99 per month, with a 3-day free trial. ### Can I use American V-Twin Diagnostics without a subscription? Yes, the app provides a robust free version that includes circuit wiring diagrams, DTC code lookups, torque specifications, and service intervals without requiring a subscription. ### Does American V-Twin Diagnostics require any hardware to work? No, American V-Twin Diagnostics does not require any external hardware, dongles, or adapters. It functions solely through your smartphone or tablet. ### How often is American V-Twin Diagnostics updated? The app was last updated on May 23, 2026, with version 1.2.0. This indicates a recent update, suggesting ongoing development and support. ### What are the benefits of the Premium subscription for American V-Twin Diagnostics? The Premium subscription unlocks guided diagnostic paths for all major systems, a comprehensive mechanic's checklist, motorcycle garage features for multiple bikes, PDF diagnostic reports, and service record logging. ### Is American V-Twin Diagnostics suitable for beginners? Yes, the app is designed to help users understand diagnostic trouble codes in plain English and provides step-by-step guidance, making it accessible for those new to motorcycle diagnostics. ### What is the age rating for American V-Twin Diagnostics? American V-Twin Diagnostics has an age rating of 4+, making it appropriate for a wide range of users. ## Version history (last 3 releases) ### 1.2.0 — 2026-05-23 This update is about cleaning up the UI for a more polished experience. The login experience has been rebuilt. If you don't have an active subscription, the app now takes you straight to the upgrade screen. If you're already subscribed, you'll see a clean logout option. The paywall has been simplified as well. The app icon has been redesigned. Brighter, bolder, and more visible on your home screen. Language across the app has been cleaned up and made consistent. Under the hood, a series of performance and reliability improvements have been applied based on a full code review. The app loads faster, handles edge cases more gracefully, and behaves more predictably across all supported devices. American V-Twin Diagnostics is built for riders who want to understand their machine — not just hand it over and hope for the best. Every update moves it closer to the tool you deserve. ### 1.1.9 — 2026-05-14 Bug Fixes and better UI flow ### 1.1.4 — 2026-05-07 No release notes. ## More apps by Matthew Griffin - [V-Twin Diagnostics](https://appshunter.io/ios/app/v-twin-diagnostics/id6774809735) All apps by Matthew Griffin: https://appshunter.io/developer/1896149286 --- *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 2026-07-10.*