V-Twin Diagnostics
Matthew Griffin Utilities iPhoneiPadiPod touch
V-Twin Diagnostics is a free Utilities app for iPhone and iPad by Matthew Griffin. Rated 4.0/5 from 2 ratings. Requires iOS 15.1. Updated August 31, 2026.
- Rating
- 4.0
- 2 ratings
- Price
- Free
- on the App Store
- Size
- 63 MB
- Age 4+
- Updated
- Aug 31
- 2026 · v2.1.2
Screenshots
About V-Twin Diagnostics
Your bike's down. The dealer's booked two weeks out. And they charge hundreds just to tell you what's wrong. Every Harley rider knows this math: $100 to $300 for the tow, days or weeks on the lift waitlist, then a diagnostic fee just to be told what your bike was already trying to say. V-Twin Diagnostics ends that. Answer questions about what your bike is doing, what you see, hear, and feel. The app walks the same systematic process a trained tech uses and lands on the probable cause in minutes. No code reader. No hardware. No waiting. ONE DIAGNOSTIC PASS. EVERYTHING BELOW IS IN IT: • Guided Diagnostic Path: proprietary step-by-step troubleshooting built for your exact year and model • Comprehensive Diagnostic Report: complete specs, related trouble codes, the full path you followed, and findings, saved to your bike's profile • Circuit Diagrams and Component Cards: see the actual system behind each probable cause • A Parking Spot in Your Garage: your bike's profile with full specs, notes, and history • Diagnostic History: every run saved, ready to review or export as a PDF PAY ONLY WHEN YOUR BIKE NEEDS IT. NO SUBSCRIPTION REQUIRED. • Diagnostic Pass, $9.99: one complete diagnostic. Never expires. • 3-Pack, $24.99: bank them for when it counts. • Annual License, $59.99/yr: unlimited diagnostics for every bike in your garage, less than half of one dealer diagnostic fee, plus the annual-only Mechanic's Checklists. FREE FOR EVERY RIDER, NO ACCOUNT NEEDED: • DTC code lookup: 71 trouble codes in plain English with probable causes • Torque specs: 119 specs for Twin Cam and Evolution Sportster • Recommended service intervals by mileage FREE WITH AN ACCOUNT: a parking spot for your bike and the Oil Change Service Scheduler, free oil-change reminders matched to your bike and mileage. Covers 2007–2017 Harley-Davidson motorcycles with Delphi EFI: Touring, Softail, Dyna, and Evolution Sportster, including CVO variants. It's YOUR bike. It's been talking to you this whole time. Now you speak the language. V-Twin Diagnostics is an independent aftermarket reference tool, not affiliated with or endorsed by Harley-Davidson. Terms of Use (EULA): https://vtwindiagnostics.com/terms Privacy Policy: https://vtwindiagnostics.com/privacy-policy
What’s new
Version 2.1.2 · Updated August 31, 2026
Improved purchase reliability and faster credit delivery after checkout. Redesigned credit counters on the Account screen. General bug fixes and stability improvements.
App privacy
The developer, Matthew Griffin, reported these privacy practices to Apple.
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers: Device ID
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Identifiers: User ID
- Usage Data: Product Interaction
- Contact Info: Email Address, Name, Phone Number
- User Content: Other User Content
Used for: Analytics, App Functionality
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Identifiers: Device ID
- Diagnostics: Crash Data, Performance Data
Used for: Analytics, App Functionality
Alternatives to V-Twin Diagnostics
Looking for apps like V-Twin Diagnostics? Here are 6 similar apps on the App Store. The highest rated is MotoDoc (5.0/5), and all 6 are free to download.
-
MotoDoc
5.0
-
Biketune
4.7
-
PowerVision 4
4.9
-
Screamin' Eagle Street Tuner
1.9
-
Fuelpak FP4
1.8
-
WeblinkMaestro
1.7
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| V-Twin Diagnostics | 4.0 / 5 (2 ratings) | Free | August 31, 2026 | |
| MotoDoc | 5.0 / 5 (2) | Free | Oct 7, 2026 | Compare |
| Biketune | 4.7 / 5 (63) | Free | Sep 30, 2026 | Compare |
| PowerVision 4 | 4.9 / 5 (312) | Free | Oct 12, 2026 | Compare |
| Screamin' Eagle Street Tuner | 1.9 / 5 (95) | Free | Sep 22, 2026 | Compare |
| Fuelpak FP4 | 1.8 / 5 (59) | Free | May 4, 2026 | Compare |
| WeblinkMaestro | 1.7 / 5 (22) | Free | Mar 14, 2026 | Compare |
Compare V-Twin Diagnostics with the top alternatives: ratings, updates, ASO score and keyword gaps →