Comparison

OBD JScan vs TopGuru

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

Head to head
About

OBD JScan

This app provides advanced diagnostics for Jeep, Chrysler, and Dodge vehicles. It allows users to read and clear trouble codes, view live sensor data, and access settings across all vehicle modules, including ABS and transmission.

Highlights
  • Read/Clear Diagnostic Trouble Codes
  • Access Live Data from all sensors
  • View vehicle settings
  • Access all vehicle modules (ABS, Transmission, etc.)
  • Identify module, VIN, Part Number, and Version
  • Share vehicle trouble codes
Features
Read full description

What is OBD JScan? OBD JScan is powerful Jeep & Chrysler & Dodge diagnostic application. JScan allows reading standard Diagnostic Trouble Codes (emission related), general Live Data and Adaptations and much more. Thats not all. JScan can access all modules avalable on your vehicle. ABS, Steering Column, Automatic Transimmsion, Radio, Sway Bar, Havac and many more. Some supported cars: Jeep Wrangler JK, Jeep Wrangler JL - additional hardware required to bypass security gateway* Jeep Wrangler JT - additional hardware required to bypass security gateway* Jeep Wrangler 4XE - additional hardware required to bypass security gateway* Jeep Grand Cherokee WK Jeep Grand Cherokee, WK2 11-13 Jeep Grand Cherokee WK2 14-21 - 18+ - additional hardware required to bypass security gateway* Jeep Commander XK Jeep Liberty/Cherokee KK, Jeep Compass, Jeep Patriot MK Dodge Avenger Dodge Grand Caravan RT, Dodge Journey, Dodge Caliber Dodge Durango 2004-2009 Dodge Durango 2011-2013 Dodge Durango 2014-2023* Dodge Ram Dodge Nitro Dodge Magnum Dodge Challenger - 08-14 Dodge Challenger - 14+ Dodge Charger- 06-10 Dodge Charger- 11+ Dodge Avenger Chrysler Town&Country RT Chrysler 200 Chrysler 300C Chrysler 300 Chrysler Sebring Chrysler Aspen and more.. * WK2 2018+ = requires securit bypass cable * Dodge Durango 2018+ = requires securit bypass cable * Dodge Ram 2018+ = requires securit bypass cable * JL requires security bypass cable * JT requires security bypass cable * http://jscan.net/jl-jt-security-bypass/ What can I Do with JScan? JScan allows you to access, diagnostic trouble codes and Live Data in all modules. You can easily Read, Clear, Share vehicle Trouble Codes. View Live Data from all sensors in vehicle. View vehicle settings. Identify module, Vin, Part Number, Version and more. Recommended device: - OBD ELM 327 compatible device is required to make app work as expected. Recommended adapters: - iCar Pro 4.0 Bluetooth LE (Bluetooth) - Vlinker MC+ (Bluetooth) - for newer cars - OBD Link MX+ Bluetooth (Bluetooth) More info about supported and recommended OBD adapters: http://jscan.net/supported-and-not-supported-obd-adapters/ Facebook: https://www.facebook.com/obdjscan/ Website: http://jscan.net/

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

Screenshots

OBD JScan4 screens
TopGuru4 screens

Verdict

The call

The clearest difference is review sentiment: OBD JScan at 80% against TopGuru's 29%. OBD JScan also leads on rating (4.7 vs 3.5) and ratings volume (1.3K vs 413). TopGuru's advantage is chart position (#163 vs unranked). On price, update cadence, ads and in-app purchases 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. OBD JScan sells 7 one-off in-app purchases and TopGuru sells 21 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

OBD JScan holds the better App Store score, 4.7 against 3.5. Both are backed by a comparable volume of ratings — 1.3K and 413 respectively. Written reviews point the same way: 80% of OBD JScan's written reviews are positive against 29% of TopGuru's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. Both last shipped on October 25, 2026.

Scorecard5 real differences · 6 level
OBD JScan versus TopGuru: the parameters behind the verdict, then further details
ParameterOBD JScanTopGuru
PriceFreeFree
Rating4.7 (1.3K ratings) — better3.5 (413 ratings)
Positive reviews79.6% of reviews — better29.3% of reviews
Number of ratings1.3K — better413
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#163 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size403 MB2.2 GB
Age rating12+4+
DeveloperPiotr BialicHK TOPDON TECHNOLOGY Co., LIMITED

Customer experience

OBD JScan

All ratings1,296 ratings
Positive93.4%
Neutral1.9%
Negative4.6%
Written reviews240 reviews
Positive79.6%
Neutral5.0%
Negative15.4%

TopGuru

All ratings409 ratings
Positive60.1%
Neutral8.3%
Negative31.5%
Written reviews191 reviews
Positive29.3%
Neutral13.1%
Negative57.6%

User reviews

OBD JScan

From 1.3K App Store ratings

What we love

  • 🚀 Easy to use
  • 🔧 Powerful customization options
  • 👍 Excellent customer support
  • 💡 Useful diagnostic and monitoring features
  • 🔓 Enables features otherwise locked by dealer

Room to improve

  • 🐛 Occasional connectivity issues
  • 🔌 Requires additional hardware purchase
  • ⚠️ Compatibility issues with newer vehicle models
  • 🕰️ Slow performance in certain scenarios

TopGuru

From 413 App Store ratings

What we love

  • 👍 Works well on most vehicles
  • 🚀 Powerful features for the price
  • 💡 Useful for DIY and professional mechanics

Room to improve

  • 🐛 Frequent app crashes and bugs
  • ⏱️ Slow and cumbersome to use due to constant updates
  • 🔒 Concerns about data privacy and security
  • 💰 Subscription model after initial purchase

Bugs and requests

OBD JScan

Reported bugs

2 issues
  • Inability to save/export diagnostic data
  • Inconsistent behavior when changing vehicle settings

Requested features

4 requests
  • Expanded vehicle compatibility
  • Improved stability and reliability
  • Enhanced user interface and guidance
  • Integration with other vehicle apps/services

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

In-app purchases

7 purchases

OBD JScan

One-time7
  • + 1 garage license2 variants$9.99
  • 1 VIN license$20.99
  • Add 1 VIN$20.99
Show 4 more
  • Add 1 VIN Vehicle Slot$20.99
  • 3 VIN licenses$54.99
  • 5 VIN Licenses$84.99
  • 10 VIN Licenses$149.99
21 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-time16
  • Renault Gateway 1-Token$11.99
  • Diag Bundle Renewal3 variants$49.99
  • TopGuru Diagnostic Bundle$49.99
Show 13 more
  • TopGuru IMMO Bundle$49.99
  • 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

Questions

Is OBD JScan free?
OBD JScan is free to download, with in-app purchases available.
Is TopGuru free?
TopGuru is free to download, with in-app purchases available.
Which has better reviews, OBD JScan or TopGuru?
OBD JScan is rated higher. OBD JScan averages 4.7 out of 5 from 1.3K ratings, while TopGuru averages 3.5 from 413 ratings.
Do OBD JScan or TopGuru have ads?
Neither OBD JScan nor TopGuru shows ads.
Which is updated more often, OBD JScan or TopGuru?
OBD JScan ships an update every 3 weeks, and TopGuru every 3 weeks. Most recently, OBD JScan was updated on October 25, 2026 and TopGuru on October 25, 2026.

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