Carista OBD2 vs Unit Lab
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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
Unit Lab
Read full descriptionHide full description
Unit Lab is a fast, fully offline unit converter with a built-in calculator — 400+ units across 25 categories, from everyday metric and imperial to the ones other converters don't have. CONVERT ANYTHING • Length, area, volume, mass, temperature, speed, pressure, energy, power, data, time, angles, fuel economy and more • Ancient and apothecary measures — cubits, drachms, grains • Live results as you type, with instant unit swap • See a value in every unit of a category at once LAB VALUES • Convert clinical lab results between conventional and SI units — glucose, cholesterol, creatinine, and more substance groups • Factors pinned from published clinical references • For unit conversion only — not medical or dosing advice COOKING THAT KNOWS INGREDIENTS • Convert cups to grams correctly — flour, sugar, butter, honey and other ingredients each use their real density • US and metric kitchen measures, sticks of butter included CALCULATOR INCLUDED • Clean calculator with memory keys and history you can reuse MAKE IT YOURS • Four themes — Functional, Cute, Futuristic, Fantasy — in light and dark • Favorites and recents for one-tap access PRIVATE BY DESIGN • Works fully offline — nothing you type ever leaves your device • No accounts, no sign-up • One-time "Remove Ads" purchase if you want an ad-free experience
Screenshots
Verdict
The clearest difference is chart position: Carista OBD2 at #185 against Unit Lab's unranked. 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
Both are free to download. Carista OBD2 sells 6 in-app purchases, starting at $19.99 per month and Unit Lab sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | Carista OBD2 | Unit Lab |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (4.2K ratings) — better | — |
| Positive reviews | 34.2% of reviews | — |
| Number of ratings | 4.2K — better | — |
| Update frequency | Every 3 weeks | — |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Best chart rank | #185 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 142 MB | 34 MB |
| Age rating | 17+ | 4+ |
| Developer | Prizmos | JONATHAN PETER WARNER |
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
Unit Lab
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Carista OBD2
- Basic$19.991 Month
- Pro$19.991 Month
- 1 month Pro4 variants$19.991 Month
Show 2 moreShow fewer
- 3 month Pro2 variants$29.993 Months
- Pro5 variants$59.991 Year
- One-Time Diagnostic & Reset$9.99
Unit Lab
- Remove Ads$1.99
Questions
Is Carista OBD2 free?
Is Unit Lab free?
Do Carista OBD2 or Unit Lab have ads?
Other comparisons















