Comparison

ThinkDiag+ vs ANCEL BT500

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

Head to head
About

ThinkDiag+

This app provides professional-level vehicle diagnostics, offering features like reading/clearing fault codes, data flow analysis, and special maintenance functions. It supports a wide range of car brands and allows users to subscribe to specific diagnostic software. Connects via Bluetooth to your smartphone for intelligent vehicle analysis.

Highlights
  • OE-level diagnostic functions
  • Full OBD II diagnosis
  • Special maintenance functions
  • Supports 100+ vehicle brands
  • Automatic VIN reading
  • Professional diagnostic reports
  • In-app user community
Features
Read full description

1. Profession functions refer to OE level functions, such as read/clear code, data flow diagram, read ECU, drive test, bidirectional special functions, etc. 2. Support full-function OBD II diagnosis, read data flow, freeze frame read IM/real-time data, read/clear fault code, vehicle on-board monitoring/computer system control operation and read vehicle information. 3. Support vehicle maintenance light return to normal. 4. Select any vehicle diagnostic software, covering up to 39 major automobile manufacturers. 5. Support automatic VIN reading and one-key diagnosis. 6. Clear interpretation of fault codes and generate professional diagnostic reports. 7. Be able to communicate with other users within the ThinkDiag community (share/help/support). Not only for "ThinkDiag" and "ThinkDiag 2" device, but also works for "ThinkDiag Mini", "ThinkDirver", and "Thinkcar Pro" devices. ThinkDiag, an innovative vehicle diagnostic tool, is specially designed for repair technicians, small and medium-sized repair shops, and DIYers, to achieve the original manufacturer level diagnostic performance. It supports more than 100 vehicle brands of diagnostic services, including 15 special maintenance reset functions. ThinkDiag is as good as those comprehensive diagnostic equipment costed thousands of dollars. ThinkDiag is also an intelligent diagnostic device. Connecting with smartphone via Bluetooth, it is controlled to work by app. In the app, there is a diagnostic software store, and users can subscribe for diagnostic software according to their needs. ***Contact Us W: www.mythinkcar.com E: service@mythinkcar.com P: +1 833-692-2766 2151 S Haven Ave Unit 203 Ontario CA 91761 USA

About

ANCEL BT500

This application allows users to control Bluetooth battery testers to assess battery health, cranking, and charging systems. It enables saving and sharing test results for professional analysis.

Highlights
  • Bluetooth device control
  • Battery condition testing
  • Cranking system testing
  • Charging system testing
  • Data saving
  • Result sharing
Features
Read full description

ANCEL BT500 is the App used for Bluetooth battery tester. It can control battery tester devices via Bluetooth. User can easily do test on battery condition, cranking and charging systems. All data can be saved and historical professional result can be shared by internet and printed out.

Screenshots

ThinkDiag+4 screens
ANCEL BT5004 screens

Verdict

The call

The clearest difference is rating: ThinkDiag+ at 4.5 against ANCEL BT500's 3.0. ThinkDiag+ also leads on update cadence (every 3 weeks vs every 5 months) and ratings volume (4.3K vs 2). ANCEL BT500's advantage is review sentiment (100% vs 74%) and monetization model (free vs free with in-app purchases). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ThinkDiag+ holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: ThinkDiag+ has 4.3K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 74% of ThinkDiag+'s written reviews are positive against 100% of ANCEL BT500's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

ThinkDiag+ ships an update every 3 weeks, ANCEL BT500 every 5 months. The most recent releases landed on September 25, 2026 and September 14, 2026 respectively.

Scorecard6 real differences · 4 level
ThinkDiag+ versus ANCEL BT500: the parameters behind the verdict, then further details
ParameterThinkDiag+ANCEL BT500
PriceFreeFree
Rating4.5 (4.3K ratings) — better3.0 (2 ratings)
Positive reviews73.6% of reviews100.0% of reviews — better
Number of ratings4.3K — better2
Update frequencyEvery 3 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better15.6
Further details — not scored
Size539 MB5 MB
Age rating17+4+
DeveloperTHINKCAR INCOBDSPACE TECHNOLOGY CO.,LTD

Customer experience

ThinkDiag+

All ratings4,308 ratings
Positive88.1%
Neutral2.7%
Negative9.2%
Written reviews273 reviews
Positive73.6%
Neutral2.6%
Negative23.8%

ANCEL BT500

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

ThinkDiag+

Reported bugs

3 issues
  • Failure to recognize VIN or vehicle information
  • Inability to clear certain error codes
  • Inconsistent performance across different devices

Requested features

4 requests
  • Improved user interface and navigation
  • More detailed troubleshooting guides
  • Expanded vehicle coverage and special functions
  • Offline mode for diagnostics

ANCEL BT500

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ThinkDiag+

No in-app purchases

None

ANCEL BT500

No in-app purchases

Questions

Is ThinkDiag+ free?
ThinkDiag+ is free to download, with no in-app purchases.
Is ANCEL BT500 free?
ANCEL BT500 is free to download, with no in-app purchases.
Which has better reviews, ThinkDiag+ or ANCEL BT500?
ThinkDiag+ is rated higher. ThinkDiag+ averages 4.5 out of 5 from 4.3K ratings, while ANCEL BT500 averages 3.0 from 2 ratings.
Do ThinkDiag+ or ANCEL BT500 have ads?
Neither ThinkDiag+ nor ANCEL BT500 shows ads.
Which is updated more often, ThinkDiag+ or ANCEL BT500?
ThinkDiag+ ships an update every 3 weeks, and ANCEL BT500 every 5 months. Most recently, ThinkDiag+ was updated on September 25, 2026 and ANCEL BT500 on September 14, 2026.

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