Comparison

Carista OBD2 vs ThinkDiag+

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

Head to head
About

Carista OBD2

This app acts as a DIY car mechanic, allowing you to customize features, diagnose warning lights, monitor live data, and perform maintenance. Save time and money by handling common car tasks yourself.

Highlights
  • Customize car behavior and unlock hidden features
  • Diagnose and reset dashboard warning lights
  • Monitor real-time vehicle parameters
  • Perform simple DIY car maintenance procedures
  • Access advanced electronic diagnostics
Features
Read full description

Carista lets you diagnose warning lights, read and reset fault codes, monitor live vehicle data, customize your car, and perform DIY service procedures - all from your phone. Save hours and thousands of dollars in unnecessary workshop visits, and take control of your car's maintenance, diagnostics, and personalization. Trusted by 3+ million users worldwide, Carista supports 30+ car brands, offers SFD & SFD2 compatibility, and brings 10+ years of leadership in the OBD2 industry. CUSTOMIZE YOUR CAR (PRO) Unlock hidden features and personalize how your car behaves. • Gauge needle sweep at startup • Start screen logo • Virtual instrument cluster themes • Daytime running lights • Coming-home and leaving-home lights • Throttle response behavior And many more ADVANCED DIAGNOSTICS (PRO) Go beyond the Check Engine Light. Diagnose multiple electronic control modules, including ABS, airbag, SRS, Engine, Transmission, and manufacturer-specific systems. Read and clear diagnostic trouble codes before visiting a workshop. SEE YOUR CAR'S LIVE DATA (PRO) Monitor real-time vehicle parameters and see what's happening inside your car. Depending on your vehicle, live data can include: • Engine and turbo information • Launch control count • Mileage information • Airbag crash count • Service interval information • Engine RPM and other performance parameters With supported vehicles, Apple CarPlay lets you view basic OBD2 live data on your car's screen while driving. PERFORM DIY SERVICE PROCEDURES (PRO) Handle simple maintenance yourself and avoid workshop visits. Depending on your vehicle, Carista offers: • Electronic parking brake (EPB) service • Service due indicator reset • Tire pressure sensor (TPMS) registration • Diesel particulate filter (DPF) regeneration • Battery registration And other vehicle-specific service functions SUPPORTED CAR BRANDS Carista supports Acura, Audi, BMW, Buick, Cadillac, Chevrolet, Cupra, Dacia, Ford, Genesis, GMC, Holden, Honda, Hyundai, Infiniti, Jaguar, Kia, Land Rover, Lexus, Lincoln, MAN, Mazda, Mini, Nissan, Opel/Vauxhall, Pontiac, Renault, Saab, Scion, SEAT, Skoda, Toyota, Volkswagen and Volvo. Feature availability varies by vehicle, model year and hardware: https://carista.com/apps/supported-cars BASIC OBD2 FEATURES FOR MOST 2005/2008+ CARS (FREE) Compatible vehicles with an OBD port also get basic OBD2 diagnostics, live data, and emissions readiness tools. EASY TO USE: Locate the OBD2 port • Plug in the scanner • Turn on ignition • Open the app • Pair it with the scanner HARDWARE For the best experience, pair the app with the Carista EVO Scanner. Carista also works with selected compatible OBD2 scanners, including OBDLink CX, OBDLink MX Bluetooth, OBDLink LX, Kiwi3, and genuine Bluetooth ELM327 v1.4 scanners. The Carista OBD Scanner (white) is not compatible with Ford vehicles or SFD/SFD2-protected 2020+ Volkswagen Group vehicles. Check compatibility before purchasing a scanner. WHY CARISTA? • 3M+ users worldwide — Trusted by millions of drivers to understand, maintain, and personalize their cars. • 10+ years of automotive expertise — Over a decade of experience in vehicle diagnostics and customization. • Official Volkswagen Group partner — Trusted automotive technology with advanced capabilities for supported VW Group vehicles. • 300+ customizations — Hundreds of ways to personalize your car and unlock hidden features. • SFD & SFD2 support — Unlock supported SFD- and SFD2-protected features and customizations on compatible Volkswagen Group vehicles. • 30+ car brands supported — One app for a wide range of popular manufacturers. • One subscription. All Pro features. — Access every Pro feature for your vehicle without buying individual credits. • Regularly updated — New vehicles and features added frequently. Learn more: https://carista.com/ Supported vehicles: https://carista.com/apps/supported-cars Privacy Policy: https://carista.com/policies/privacy-policy

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

Screenshots

Carista OBD24 screens
ThinkDiag+4 screens

Verdict

The call

Carista OBD2 and ThinkDiag+ both sit at 4.6 stars, but that hides the real split: 74% of ThinkDiag+'s written reviews are positive against 34% of Carista OBD2's. ThinkDiag+ also leads on in-app purchases (none vs 14) and ads (none vs shown). Carista OBD2's advantage is chart position (#158 vs unranked). On price, rating, ratings volume and update cadence 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. Carista OBD2 sells 6 in-app purchases, starting at $19.99 per month. ThinkDiag+ asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Carista OBD2 against 4.5 for ThinkDiag+. Both are backed by a comparable volume of ratings — 4.2K and 4.4K respectively. Written reviews are what separate them: 34% of Carista OBD2's written reviews are positive against 74% of ThinkDiag+'s.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

Scorecard5 real differences · 6 level
Carista OBD2 versus ThinkDiag+: the parameters behind the verdict, then further details
ParameterCarista OBD2ThinkDiag+
PriceFreeFree
Rating4.6 (4.2K ratings) — better4.5 (4.4K ratings)
Positive reviews34.2% of reviews74.1% of reviews — better
Number of ratings4.2K4.4K — better
Update frequencyEvery 3 weeksEvery 3 weeks
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#158 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.412.0 — better
Further details — not scored
Size142 MB539 MB
Age rating17+17+
DeveloperPrizmosTHINKCAR INC

Customer experience

Carista OBD2

All ratings4,223 ratings
Positive89.5%
Neutral2.2%
Negative8.3%
Written reviews816 reviews
Positive34.2%
Neutral9.6%
Negative56.3%

ThinkDiag+

All ratings4,308 ratings
Positive88.1%
Neutral2.7%
Negative9.2%
Written reviews278 reviews
Positive74.1%
Neutral2.5%
Negative23.4%

User reviews

Carista OBD2

From 4.2K App Store ratings

What we love

  • 🚀 Easy to use
  • 👍 Customization options
  • 🚀 Efficient diagnostics
  • 💡 Helpful for maintenance
  • 👍 Great customer support

Room to improve

  • 💰 Expensive subscription
  • 🔒 Requires account login
  • 🐛 Connectivity issues
  • 🔒 Locked features behind paywall
  • 🐛 Unreliable functionality

ThinkDiag+

From 4.4K App Store ratings

What we love

  • 🚀 Easy to use
  • 🚀 Powerful diagnostic capabilities
  • 🚀 Affordable price
  • 🚀 Helpful customer support
  • 🚀 Versatile for DIY and professionals

Room to improve

  • 🐛 Occasional crashes or freezes
  • 🐛 Compatibility issues with certain vehicles
  • 🔒 Concerns about annual subscription fees
  • 🔒 Limited functionality on iOS devices

Bugs and requests

Carista OBD2

Reported bugs

5 issues
  • App crashes and freezes
  • Subscription issues and billing problems
  • Incompatibility with certain OBD2 adapters
  • Customization features not working as expected
  • Inaccurate fault code detection

Requested features

5 requests
  • Support for more vehicle makes and models
  • Offline diagnostics and customization
  • Ability to save customization settings
  • More detailed error code information
  • Improved user interface and navigation

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

In-app purchases

6 purchases

Carista OBD2

Subscriptions5
  • Basic$19.991 Month
  • Pro$19.991 Month
  • 1 month Pro4 variants$19.991 Month
Show 2 more
  • 3 month Pro2 variants$29.993 Months
  • Pro5 variants$59.991 Year
One-time1
  • One-Time Diagnostic & Reset$9.99
None

ThinkDiag+

No in-app purchases

Questions

Is Carista OBD2 free?
Carista OBD2 is free to download, with in-app purchases available.
Is ThinkDiag+ free?
ThinkDiag+ is free to download, with no in-app purchases.
Which has better reviews, Carista OBD2 or ThinkDiag+?
Carista OBD2 is rated higher. Carista OBD2 averages 4.6 out of 5 from 4.2K ratings, while ThinkDiag+ averages 4.5 from 4.4K ratings.
Do Carista OBD2 or ThinkDiag+ have ads?
Carista OBD2 shows ads; ThinkDiag+ does not.
Which is updated more often, Carista OBD2 or ThinkDiag+?
Carista OBD2 ships an update every 3 weeks, and ThinkDiag+ every 3 weeks. Most recently, Carista OBD2 was updated on October 26, 2026 and ThinkDiag+ on October 25, 2026.

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