Comparison

Advancer AD20 vs TopGuru

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

Head to head
About

Advancer AD20

This app connects to a smart OBD dongle to provide vehicle health checks, diagnosis, and real-time monitoring. It helps identify fault codes, analyze driving habits, and offers maintenance reminders for enhanced driving safety.

Highlights
  • OBD-II Diagnosis
  • In-depth system check
  • Live vehicle data monitoring
  • Maintenance light reset
  • Trip recorder
  • Driving habits analysis
Features
Read full description

Advancer Smart OBD Dongle (AD20/AD20 Pro) is a smart diagnosis terminal that communicates with your iOS devices via BT 5.0. With the Advancer app, AD20 provides services like vehicle health check, diagnosis, driving habits analysis for car owners. Help the vehicle owner to check at any time whether the vehicle is out of order, display the cause of the fault and maintenance suggestions, monitor the status of the vehicle in real time and alert the safety hazards early to ensure your driving safety 1)OBD-II Diagnosis Advancer AD20 can read and categorize the fault codes (DTCs) that storage inside the vehicle ECU via standard OBD-II protocols. 2)In-depth Check In-depth check function allows you to do thorough check on vehicle systems like engine, powertrain, brakes, steering, safety, infotainment and so on, which helps owners to know the health condition of the car clearly and provide safe and comfortable driving experience on travels. Note: In-depth check on all systems is only supported on AD20 Pro; AD20 supports in-depth check on engine only. 3)Live Data When the car is started, Advancer will provide and demonstrate detailed vehicle status like battery voltage, engine revolution speed, coolant temperature, engine load, fuel trimming and so on. This will help you to get the real-time working conditions of the car. 4)Maintenance Light Reset Reset the maintenance counter and turn off the maintenance light after finishing maintenance. For your driving safety, make sure you have followed the manual when doing maintenance to your own car. Note: Maintenance light is a reminder set by car manufacturer, which reminds drivers to do maintenances when needed. When the reminder is on, the car will show info on the dashboard screen, or simply shows a light. 5)Trip Recorder When driving, Advancer will record the index like average speed, fuel consumption, mileage, max engine revolution speed, max coolant temperature and shows them on the app. This will help you to know vehicle status and fuel consumption info on the entire trip. 6)Driving Habits Monitor With the G-sensors inside Advancer, all the sharp turns, emergency brakes and sudden accelerations will be recorded and shown on the app after analyzed. This function will provide data support if you are willing to improve your driving skills.

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

Advancer AD203 screens
TopGuru4 screens

Verdict

The call

The clearest difference is rating: TopGuru at 3.5 against Advancer AD20's 2.4. TopGuru also leads on review sentiment (29% vs 14%) and chart position (#169 vs unranked). Advancer AD20's advantage is in-app purchases (none vs 30) and iOS requirement (12.0 vs 15.0). On price, update cadence, ads and device support 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 21 in-app purchases, starting at $9.99 per month. Advancer AD20 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

TopGuru holds the better App Store score, 3.5 against 2.4. That said, the two scores are not equally well evidenced: TopGuru has 413 ratings behind it against 64, so its average is the more settled of the two. Written reviews point the same way: 14% of Advancer AD20's written reviews are positive against 29% of TopGuru's.

UpkeepUpdate frequency

Advancer AD20 ships an update monthly, TopGuru every 3 weeks. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

Scorecard7 real differences · 4 level
Advancer AD20 versus TopGuru: the parameters behind the verdict, then further details
ParameterAdvancer AD20TopGuru
PriceFreeFree
Rating2.4 (64 ratings)3.5 (413 ratings) — better
Positive reviews13.9% of reviews29.3% of reviews — better
Number of ratings64413 — better
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank—#169 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size496 MB2.2 GB
Age rating12+4+
Developer深圳市云伽未来智能技术有限公司HK TOPDON TECHNOLOGY Co., LIMITED

Customer experience

Advancer AD20

All ratings61 ratings
Positive29.5%
Neutral8.2%
Negative62.3%
Written reviews36 reviews
Positive13.9%
Neutral11.1%
Negative75.0%

TopGuru

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

User reviews

Advancer AD20

From 64 App Store ratings

What we love

  • 👍 Easy installation and pairing
  • 👍 Straightforward iPad pairing
  • 👍 Full diagnostic capabilities
  • 👍 Satisfied with results
  • 👍 Works as expected for some users

Room to improve

  • 🐛 Cannot connect to device
  • 🐛 Scanner tied to another account
  • 🐛 Required account creation
  • 🐛 Invalid email for account creation
  • 🐛 Does not connect to specific car models

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

Advancer AD20

Reported bugs

14 issues
  • Cannot connect to scanner
  • Scanner tied to another account
  • Account creation issues (invalid email)
  • Device stops working after registration
  • Login timeouts
Show 9 more
  • Connection timeouts
  • Pairing issues (only once)
  • App crashes after iOS updates
  • App not working after iOS updates
  • App doesn't connect after iOS updates
  • App opens to nothing
  • Cannot login or register
  • Stuck on login/registration screen
  • Issue launching app on mobile network

Requested features

8 requests
  • Add more languages, including Chinese
  • Improve information availability for various car models
  • Fix issues with iOS updates
  • Improve app layout and navigation
  • Increase text size and contrast
Show 3 more
  • Remember most recent fault scans
  • Remove unnecessary login requirements
  • Fix connection issues on mobile networks (4G/5G)

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

None

Advancer AD20

No in-app purchases

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 Advancer AD20 free?
Advancer AD20 is free to download, with no in-app purchases.
Is TopGuru free?
TopGuru is free to download, with in-app purchases available.
Which has better reviews, Advancer AD20 or TopGuru?
TopGuru is rated higher. Advancer AD20 averages 2.4 out of 5 from 64 ratings, while TopGuru averages 3.5 from 413 ratings.
Do Advancer AD20 or TopGuru have ads?
Neither Advancer AD20 nor TopGuru shows ads.
Which is updated more often, Advancer AD20 or TopGuru?
Advancer AD20 ships an update monthly, and TopGuru every 3 weeks. Most recently, Advancer AD20 was updated on October 23, 2026 and TopGuru on October 25, 2026.

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