Comparison

Carista OBD2 vs YMOBD

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

Head to head
About

Carista OBD2

Diagnose warning lights, reset fault codes, and monitor live vehicle data. Customize car features and perform DIY service procedures. Supports over 30 car brands and millions of users worldwide.

Highlights
  • Diagnose and reset fault codes
  • Monitor live vehicle data
  • Customize hidden car features
  • Perform DIY service procedures
  • Supports 30+ car brands
  • SFD & SFD2 compatibility
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

YMOBD

This tool connects to your car's OBD adapter via Bluetooth to collect real-time engine data, read fault codes, and provide solutions. It also records driving data, analyzes performance, and offers a HUD display for a safer and more enjoyable driving experience.

Highlights
  • Real-time engine data collection
  • Vehicle fault code reading and solutions
  • Driving data recording and analysis
  • Vehicle performance testing (acceleration, braking)
  • HUD display function
  • Day and night modes
Features
Read full description

YMOBD is a practical too. It has the characteristics of simple operation and accurate data, and is suitable for long-term use by car owners and users. Keep your car away from hidden dangers and make driving fun! Connect and communicate with the OBD adapter via Bluetooth: It can collect car engine data in real time, such as engine speed, ignition time, then correction, water temperature, fuel consumption, etc., with two modes of day and night, with HUD display function. It can read vehicle fault codes and provide professional solutions for detected vehicle fault codes. The driving process of the vehicle can be recorded every time. Analyze and summarize data such as mileage, average fuel consumption, driving time, and driving speed. It can test the acceleration, braking, and other performance of the vehicle, and provide analysis reports.

Screenshots

Carista OBD24 screens
YMOBD4 screens

Verdict

The call

The clearest difference is rating: Carista OBD2 at 4.6 against YMOBD's 2.9. Carista OBD2 also leads on ratings volume (4.3K vs 87) and chart position (#178 vs unranked). YMOBD's advantage is ads (none vs shown). On price, review sentiment, in-app purchases and monetization model 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 5 in-app purchases, starting at $19.99 per month and YMOBD sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Carista OBD2 holds the better App Store score, 4.6 against 2.9. That said, the two scores are not equally well evidenced: Carista OBD2 has 4.3K ratings behind it against 87, so its average is the more settled of the two. Written reviews complicate that: 34% of Carista OBD2's written reviews are positive against 36% of YMOBD's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Carista OBD2 ships an update every 3 weeks, YMOBD every 5 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 6 level
Carista OBD2 versus YMOBD: the parameters behind the verdict, then further details
ParameterCarista OBD2YMOBD
PriceFreeFree
Rating4.6 (4.3K ratings) — better2.9 (87 ratings)
Positive reviews34.2% of reviews35.6% of reviews — better
Number of ratings4.3K — better87
Update frequencyEvery 3 weeks — betterEvery 5 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#178 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.415.0 — better
Further details — not scored
Size141 MB49 MB
Age rating17+4+
DeveloperPrizmosshenzhen yuming

Customer experience

Carista OBD2

All ratings4,275 ratings
Positive89.3%
Neutral2.3%
Negative8.4%
Written reviews816 reviews
Positive34.2%
Neutral9.6%
Negative56.3%

YMOBD

All ratings87 ratings
Positive44.8%
Neutral2.3%
Negative52.9%
Written reviews73 reviews
Positive35.6%
Neutral0.0%
Negative64.4%

User reviews

Carista OBD2

From 4.3K 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

YMOBD

From 87 App Store ratings

What we love

  • 👍 Works well with Toyota
  • 👍 Accurate with many functions
  • 👍 Amazing for fixing cars
  • 👍 Useful for live data monitoring
  • 👍 Great and very detailed

Room to improve

  • 🐛 Scam, pay again for add-on
  • 🐛 Crashes on iPhone 17 Pro
  • 🐛 Requires personal info sharing
  • 🐛 Does not connect at all
  • 🐛 Junk, doesn't read OBD2 reader

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

YMOBD

Reported bugs

15 issues
  • App crashes on iPhone 17 Pro
  • Purchased add-on requires payment again
  • Contact section not working
  • App crashes every time on iPhone 17 Pro
  • Does not connect at all
Show 10 more
  • OBD2 reader not read by software
  • No transmission temperature reading
  • Bluetooth keeps disconnecting
  • App says OBD is connected but doesn't show info
  • Updated firmware, now won't connect
  • App stopped working after update
  • Rarely connects, disconnects when trying to get info
  • Email not arriving for account creation
  • Captcha not working/sending code
  • Does not work on iOS 18

Requested features

10 requests
  • Dark Mode support
  • Landscape mode support
  • Store data for comparison over time
  • Summary of vehicle diagnostics without connection
  • Run in background feature
Show 5 more
  • Weekly report of diagnostics
  • Allow viewing diagnostic data in offline mode
  • Remove need for model, make, year input for quick scans
  • More frequent updates and optimizations
  • Add landscape function in dashboard

In-app purchases

5 purchases

Carista OBD2

Subscriptions5
  • 1 Car – Monthly$19.991 Month
  • Pro$19.991 Month
  • 1 month Pro3 variants$19.991 Month
Show 2 more
  • 3 month Pro$29.993 Months
  • Pro4 variants$59.991 Year
4 purchases

YMOBD

One-time4
  • 车辆年检模拟$0.99
  • YMOBD-business expansion$1.99
  • YMOBD-Battery monitoring$2.99
Show 1 more
  • Super Car Sound$5.99

Questions

Is Carista OBD2 free?
Carista OBD2 is free to download, with in-app purchases available.
Is YMOBD free?
YMOBD is free to download, with in-app purchases available.
Which has better reviews, Carista OBD2 or YMOBD?
Carista OBD2 is rated higher. Carista OBD2 averages 4.6 out of 5 from 4.3K ratings, while YMOBD averages 2.9 from 87 ratings.
Do Carista OBD2 or YMOBD have ads?
Carista OBD2 shows ads; YMOBD does not.
Which is updated more often, Carista OBD2 or YMOBD?
Carista OBD2 ships an update every 3 weeks, and YMOBD every 5 weeks. Most recently, Carista OBD2 was updated on November 6, 2026 and YMOBD on November 3, 2026.

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