Comparison

TopGuru vs V

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

TopGuru

Transform your phone or tablet into a powerful vehicle diagnostic tool via Bluetooth. Access full system diagnosis, OBDII functions, bi-directional controls, and essential maintenance services for a wide range of car brands. Generate detailed diagnostic reports for efficient troubleshooting.

Highlights
  • Full System Diagnosis
  • Full OBD2 Functions
  • Bi-directional Control
  • 8 Special Maintenance Functions
  • AutoVIN Vehicle Identification
  • Diagnostic Report Generation
  • Wireless Bluetooth 5.0 Connection
Features
Read full description

Easily link the app with your Phone or Tablet using Bluetooth, transforming your devices into a smart and high-powered diagnostic tool! Packed with essential features like complete OBDII functionality, all system diagnosis, Bi-Directional controls, AutoVIN, automatic diagnostic reports, and more, this Bluetooth OBDII scan tool is a must-have for technicians. Its versatility shines through with eight maintenance service functions and coverage for over 60 vehicle brands, making the product a portable and adaptable auto scanner. Main Features: 1. Full System Diagnosis: Covers Engine, Transmission, Airbag, ABS, ESP, TPMS, Immobilizer, Gateway, Steering, Radio, Air Conditioning, and more. 2. Full OBD2 Functions: works as an OBD2 code reader and performs all 10 modes of OBD2 testing free for life. 3. Bi-directional Control: Easily locate issues with active tests. 4. 8 Special Functions: Perform Oil Reset, Throttle Adaptation, EPB Reset, BMS Reset, and more. 5. Repair Data Library: Includes DTC Repair Guide, Technical Service Bulletin, DLC Location, Warning Light Library. 6. AutoVIN: Enables automatic vehicle identification for quick diagnosis. 7. Wireless Connection: Utilizes Bluetooth 5.0 with a range of 33 feet/10m. 8. Graphs, Values, and Dashboard-like Data Display: Ensures easy interpretation of information. 9. Generate Diagnostic Reports: Obtain detailed reports for Systems, Fault Codes, or Data Streams. 10. Pro version features 13 reset functions and IMMO capability. Terms of Use (EULA): https://plat.topdon.com/topdon-plat/out-user/baseinfo/template/getHtmlContentById?softCode=TopScan_DisplaySW_iOS&language=7&type=25

About

V

Troubleshoot your Harley EFI motorcycle with symptom-based diagnostics and service reminders. Access DTC codes, torque specs, and bike-specific information without hardware. Offers a premium subscription for guided troubleshooting and detailed diagrams.

Highlights
  • Symptom-based diagnostic Q&A
  • DTC trouble code lookup
  • Torque specs and service intervals
  • Smart Service Scheduler
  • Circuit diagrams
  • Component identification cards
Features
Read full description

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

Screenshots

TopGuru4 screens
V4 screens

Verdict

The call

The clearest difference is rating: V at 4.0 against TopGuru's 3.5. V also leads on update cadence (weekly vs every 3 weeks). TopGuru's advantage is review sentiment (29% vs 0%) and ratings volume (404 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. TopGuru sells 20 in-app purchases, starting at $9.99 per month and V sells 1 in-app purchase, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

V holds the better App Store score, 4.0 against 3.5. That said, the two scores are not equally well evidenced: TopGuru has 404 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 29% of TopGuru's written reviews are positive against 0% of V's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

TopGuru ships an update every 3 weeks, V weekly. The most recent releases landed on September 25, 2026 and September 10, 2026 respectively.

Scorecard6 real differences · 5 level
TopGuru versus V: the parameters behind the verdict, then further details
ParameterTopGuruV
PriceFreeFree
Rating3.5 (404 ratings)4.0 (2 ratings) — better
Positive reviews29.3% of reviews — better0.0% of reviews
Number of ratings404 — better2
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#167 — better—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS11.0 — better15.1
Further details — not scored
Size2.2 GB63 MB
Age rating4+4+
DeveloperHK TOPDON TECHNOLOGY Co., LIMITEDMatthew Griffin

Customer experience

TopGuru

All ratings404 ratings
Positive60.4%
Neutral8.4%
Negative31.2%
Written reviews188 reviews
Positive29.3%
Neutral13.3%
Negative57.4%

V

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

Bugs and requests

TopGuru

Reported bugs

3 issues
  • Incompatibility with certain vehicle models
  • Login and account issues
  • Unreliable Bluetooth connectivity

Requested features

3 requests
  • iPad optimization and full-screen support
  • Expanded vehicle coverage, especially for motorcycles
  • Ability to save and export diagnostic data

V

Not enough reviews yet to summarise bugs or requests.

In-app purchases

20 purchases

TopGuru

Subscriptions5
  • Monthly Auto-renewal$9.991 Month
  • Monthly Auto-renewal$19.001 Month
  • Quarterly Auto-renewal$24.993 Months
Show 2 more
  • Annual Auto-renewal$49.991 Year
  • Annual Auto-renewal$99.001 Year
One-time15
  • Diag Bundle Renewal3 variants$49.99
  • TopGuru Diagnostic Bundle$49.99
  • TopGuru IMMO Bundle$49.99
Show 12 more
  • Renewal Bundle4 variants$99.00
  • TopScan Pro Renewal Bundle3 variants$99.00
  • Harley Moto Software$99.99
  • Harley Moto Software Renewal$99.99
  • Moto Diag Bundle Renewal-Moto$99.99
  • Moto Diag Bundle$99.99
  • Moto Diag Bundle Renewal$99.99
  • 22 Special Functions Bundle2 variants$129.99
  • Renault Gateway 10 Tokens$129.99
  • Renault Gateway 5 Tokens$147.99
  • 17 Special Functions Bundle2 variants$179.00
  • FCA Gateway 1-year (EU only)$229.99
1 purchases

V

Subscriptions1
  • V-Twin Premium3 Days trial$9.991 Month

Questions

Is TopGuru free?
TopGuru is free to download, with in-app purchases available.
Is V free?
V is free to download, with in-app purchases available.
Which has better reviews, TopGuru or V?
V is rated higher. TopGuru averages 3.5 out of 5 from 404 ratings, while V averages 4.0 from 2 ratings.
Do TopGuru or V have ads?
Neither TopGuru nor V shows ads.
Which is updated more often, TopGuru or V?
TopGuru ships an update every 3 weeks, and V weekly. Most recently, TopGuru was updated on September 25, 2026 and V on September 10, 2026.

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