Comparison

Advancer AD20 vs TOPDON CarPal

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

TOPDON CarPal

Transform your phone into a powerful car diagnostic tool with this app. It offers comprehensive system scans, full OBDII functionality, and specialized maintenance services for a wide range of vehicle brands. Easily identify issues, access repair data, and generate detailed reports wirelessly.

Highlights
  • Full System Diagnosis
  • Full OBD2 Functions
  • 6 Special Maintenance Functions
  • AutoVIN Vehicle Identification
  • Wireless Bluetooth Connection
  • Diagnostic Report Generation
Features
Read full description

Easily link the app with your Phone using Bluetooth, transforming your devices into a smart and high-powered diagnostic tool! Packed with essential features like complete OBDII functionality, all system diagnosis, AutoVIN, automatic diagnostic reports, and more, this Bluetooth OBDII scan tool is a must-have for your car. Its versatility shines through with 6 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, 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. 6 Special Functions: Perform Oil Reset, Throttle Adaptation, EPB Reset, BMS Reset, and more. 4. Repair Data Library: Includes DTC Repair Guide, Technical Service Bulletin, DLC Location, Warning Light Library. 5. AutoVIN: Enables automatic vehicle identification for quick diagnosis. 6. Wireless Connection: Utilizes Bluetooth 5.0 with a range of 33 feet/10m. 7. Graphs, Values, and Dashboard-like Data Display: Ensures easy interpretation of information. 8. Generate Diagnostic Reports: Obtain detailed reports for Systems, Fault Codes, or Data Streams. Terms of Use (EULA): https://plat.topdon.com/topdon-plat/out-user/baseinfo/template/getHtmlContentById?softCode=Car_Pal_DisplaySW_iOS&language=7&type=25

Screenshots

Advancer AD203 screens
TOPDON CarPal4 screens

Verdict

The call

The clearest difference is rating: TOPDON CarPal at 3.7 against Advancer AD20's 2.4. TOPDON CarPal also leads on review sentiment (39% vs 14%). Advancer AD20's advantage is in-app purchases (none vs 10) and iOS requirement (13.0 vs 15.0). On price, ratings volume, update cadence and ads 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. TOPDON CarPal sells 10 in-app purchases, starting at $4.99 per month. Advancer AD20 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

TOPDON CarPal holds the better App Store score, 3.7 against 2.4. Both are backed by a comparable volume of ratings — 65 and 45 respectively. Written reviews point the same way: 14% of Advancer AD20's written reviews are positive against 39% of TOPDON CarPal's.

UpkeepUpdate frequency

Advancer AD20 ships an update monthly, TOPDON CarPal every 3 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard5 real differences · 5 level
Advancer AD20 versus TOPDON CarPal: the parameters behind the verdict, then further details
ParameterAdvancer AD20TOPDON CarPal
PriceFreeFree
Rating2.4 (65 ratings)3.7 (45 ratings) — better
Positive reviews13.9% of reviews39.3% of reviews — better
Number of ratings65 — better45
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size533 MB3.1 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 ratings64 ratings
Positive29.7%
Neutral9.4%
Negative60.9%
Written reviews36 reviews
Positive13.9%
Neutral11.1%
Negative75.0%

TOPDON CarPal

All ratings41 ratings
Positive65.9%
Neutral2.4%
Negative31.7%
Written reviews56 reviews
Positive39.3%
Neutral3.6%
Negative57.1%

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)

TOPDON CarPal

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Advancer AD20

No in-app purchases

10 purchases

TOPDON CarPal

Subscriptions2
  • Monthly Auto-renewal$4.991 Month
  • Renewal Bundle$29.991 Year
One-time8
  • Renault Gateway 1-Token$11.99
  • VW SFD Gateway 1-Token$11.99
  • FCA Gateway 1-Token$11.99
Show 5 more
  • FCA Gateway 30-day Access$34.99
  • VW SFD Gateway 30-day Access$34.99
  • Renault Gateway 5 Tokens$116.99
  • Renault Gateway 5 Tokens$147.99
  • VW SFD Gateway 1-year Access$199.99

Questions

Is Advancer AD20 free?
Advancer AD20 is free to download, with no in-app purchases.
Is TOPDON CarPal free?
TOPDON CarPal is free to download, with in-app purchases available.
Which has better reviews, Advancer AD20 or TOPDON CarPal?
TOPDON CarPal is rated higher. Advancer AD20 averages 2.4 out of 5 from 65 ratings, while TOPDON CarPal averages 3.7 from 45 ratings.
Do Advancer AD20 or TOPDON CarPal have ads?
Neither Advancer AD20 nor TOPDON CarPal shows ads.
Which is updated more often, Advancer AD20 or TOPDON CarPal?
Advancer AD20 ships an update monthly, and TOPDON CarPal every 3 weeks. Most recently, Advancer AD20 was updated on November 3, 2026 and TOPDON CarPal on November 4, 2026.

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