Comparison

U vs MaxiAP

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

Head to head
About

U

This app allows users to diagnose vehicle issues using their smartphone and a compatible adapter. It provides access to check engine, ABS, and airbag codes, along with definitions and potential solutions. Users can also view live data and clear diagnostic trouble codes.

Highlights
  • Read and erase OBD II codes
  • View live vehicle data
  • ABS and Airbag code access
  • Automatic vehicle identification
  • Vehicle history log
  • Powertrain enhanced data
Read full description

U-Scan provides DIYers and Professional Technicians with access to vehicle diagnostics using their smartphone when paired to the available U-Scan vehicle adapter. Developed by the Global leader in DIY and professional diagnostic scan tools. U-Scan provides essential information to diagnose vehicles fast while saving money. •Get the probable solution to a check engine, ABS, or Airbag light. Simply connect the adapter to the vehicle and pair with your smartphone to start the diagnostic process. •QuickCheck™ - Review vehicle emissions status (I/M Monitors, Codes). •Read Codes - Read Global OBD II codes and display the definition. •Erase Codes - Erase Global OBD II codes. •AutoID™ - Automatically identifies most 2000 and newer vehicles for error proof diagnostics. •TrueLink™ - U-Scan will link to all 1996 and newer vehicles. •MyGarage™ - Library of all previous diagnosed vehicles. •Vehicle Activity Log – Detailed history of your U-Scan activities. •Screen shot sharing via Facebook and email •Optional App Enhancements - For access to more advanced diagnostic capabilities. Powertrain Enhanced Data •Get access to Powertrain codes and definitions related to the check engine light for most 1996 and newer GM, Ford, Chrysler, Honda, Hyundai, Nissan and Toyota vehicles via the manufacturer specific Read Codes Powertrain diagnostic commands. •Manufacturer specific code definitions for GM, Ford, Chrysler, Toyota, Honda, Nissan, Hyundai, Audi, BMW, Daewoo, Isuzu, Jaguar, Kia, Land Rover, Mazda, Mercedes Benz, Mitsubishi, Porsche, Saab, Subaru, Suzuki, Volkswagen, and Volvo. •Freeze Frame data - Details the conditions of the vehicle at the time the trouble code was set. •View and Graph LIVE Data - View RPMs, coolant temperature, oxygen sensor readings and more for a faster diagnosis. Over 300 sensor and data items are available as supported by vehicle. •Unlock CodeConnect™ and access the most likely cause of the check engine light. Get manufacturer specific powertrain DTC fixes. (If CodeConnect™ is owned.) • Enable manufacturer specific Erase Codes Powertrain diagnostic commands. Optional App Enhancements include: ABS Codes and Definitions - $5.99 per vehicle or $29.99 all manufacturers listed below •Get access to the ABS brake codes and definitions related to the ABS warning light for most 1996 and newer GM, Ford, Chrysler, Honda, Hyundai, Nissan and Toyota vehicles via the manufacturer specific Read Codes ABS diagnostic command. •Unlock CodeConnect™ ABS fixes and access the most likely cause of the ABS warning light (If CodeConnect™ is owned.) • Enable manufacturer specific Erase Codes ABS diagnostic command. Airbag Codes and Definitions - $7.99 per vehicle or $39.99 all manufacturers listed below •Get access to the Airbag codes and definitions related to the Airbag warning light for most 1996 and newer GM, Ford, Chrysler, Honda, Nissan and Toyota vehicles via the manufacturer specific Read Codes Airbag diagnostic commands. •Unlock CodeConnect™ Airbag fixes and access the most likely cause of the Airbag warning light (If CodeConnect™ is owned.) • Enable manufacturer specific Erase Codes Airbag diagnostic commands. CodeConnect™- First vehicle included free with purchase of adapter. Additional vehicles access $12.99 per vehicle or $39.99 all vehicles •Get the next step in diagnosing your vehicle. Access over 4.3 Million Fixes that tell you what is wrong with your vehicle with CodeConnect™. CodeConnect™ is a comprehensive database of over 4.3 million verified fixes for the trouble codes that cause the check engine and ABS warning lights to illuminate. These actual vehicle fixes have been reported and then verified by our team of ASE certified technicians. •Note: You must purchase Powertrain Enhanced Data and/or ABS Codes and Definitions to access respective CodeConnect coverage for manufacture specific Powertrain and ABS warning lights

About

MaxiAP

Access comprehensive OBDII functions for free, including oil resets, EPB, and SAS. Automatically identify vehicles with VIN technology and generate shareable repair reports. Expand functionality with optional in-app purchases.

Highlights
  • All OBDII functions free
  • One free vehicle software
  • Up to 19 specific functions
  • Auto VIN technology
  • Generate repair reports
  • In-app purchase for expanded coverage
Features
Read full description

1. All OBDII functions are available and free 2. One free vehicle’s software with the initial purchase 3. Support up to 19 specific functions, including Oil Reset, EPB, BMS, SAS, DPF, TPMS, IMMO, etc. 4. Expand coverage with additional in-app purchase 5. Auto VIN technology identifies vehicles automatically 6. Generate repair reports of tested vehicles and support PDF format for easy sharing and printing 7. Keep records of vehicles tested previously

Screenshots

U4 screens
MaxiAP4 screens

Verdict

The call

The clearest difference is rating: MaxiAP at 2.2 against U's 1.9. MaxiAP also leads on update cadence (every 6 weeks vs every 4 months). U's advantage is iOS requirement (8.0 vs 13.0). On price, review sentiment, ratings volume 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. U sells 10 one-off in-app purchases and MaxiAP sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

MaxiAP holds the better App Store score, 2.2 against 1.9. Both are backed by a comparable volume of ratings — 124 and 167 respectively. Written reviews point the same way: 11% of U's written reviews are positive against 16% of MaxiAP's.

UpkeepUpdate frequency

U ships an update every 4 months, MaxiAP every 6 weeks. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.

Scorecard3 real differences · 7 level
U versus MaxiAP: the parameters behind the verdict, then further details
ParameterUMaxiAP
PriceFreeFree
Rating1.9 (124 ratings)2.2 (167 ratings) — better
Positive reviews10.9% of reviews16.3% of reviews — better
Number of ratings124167 — better
Update frequencyEvery 4 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPodiPhone, iPod
Requires iOS8.0 — better13.0
Further details — not scored
Size85 MB102 MB
Age rating4+4+
DeveloperService Solutions US LLCAutel Intelligent Technology Co., Ltd.

Customer experience

U

All ratings125 ratings
Positive20.0%
Neutral2.4%
Negative77.6%
Written reviews92 reviews
Positive10.9%
Neutral4.3%
Negative84.8%

MaxiAP

All ratings167 ratings
Positive25.1%
Neutral9.0%
Negative65.9%
Written reviews196 reviews
Positive16.3%
Neutral9.2%
Negative74.5%

User reviews

U

From 124 App Store ratings

What we love

  • ✅ Works well once successfully connected and configured
  • 📊 Provides useful diagnostic data and error code reading
  • 🔧 Helpful for identifying vehicle issues and troubleshooting
  • 📱 Good app functionality for tech-savvy users who understand setup
  • 💰 Reasonable price point for a diagnostic tool

Room to improve

  • 🔌 Severe Bluetooth connectivity issues - frequent disconnections
  • 🔄 Extremely difficult and unreliable pairing process
  • ⚠️ False 'vehicle in motion' errors when car is stationary
  • 🚫 Cannot use live data while vehicle is moving (post-update restriction)
  • 🐛 Firmware updates frequently fail or brick the device

MaxiAP

From 167 App Store ratings

What we love

  • 🚀 Powerful diagnostic capabilities
  • 💡 Useful features like TPMS sensor reset
  • 👍 Comprehensive coverage for many vehicle makes

Room to improve

  • 🐛 Connectivity issues, Bluetooth pairing problems
  • 🔍 Limited coverage for newer vehicle models
  • 🔄 Requires constant internet connection
  • 💰 Expensive subscription model per vehicle

Bugs and requests

U

Reported bugs

15 issues
  • Bluetooth connection drops frequently and won't reconnect
  • App fails to recognize connected Bluetooth device
  • Firmware update process freezes and becomes unresponsive
  • False motion detection errors preventing app operation
  • VIN entry not working or not submitting to garage
Show 10 more
  • App crashes during scanning or data retrieval
  • Device won't pair after firmware update
  • App takes 2+ minutes to recognize connected device
  • Bluetooth pairing requires manual connection in settings
  • Vehicle module detection fails or shows incorrect modules
  • App forces landscape mode without option to change
  • Live data display limited to only two screens of information
  • App won't function without mandatory vehicle garage entry
  • Connection errors persist despite correct Bluetooth pairing
  • App becomes unresponsive during update process

Requested features

10 requests
  • Enable live data monitoring while vehicle is in motion
  • Improve Bluetooth auto-detection and automatic connection
  • Add support for Australian vehicle models (Holden, Ford)
  • Expand vehicle compatibility beyond 2013 models
  • Implement dark mode for app interface
Show 5 more
  • Add customizable data display options
  • Improve app responsiveness and reduce connection delay
  • Provide comprehensive manual and troubleshooting guides
  • Add support for more vehicle modules (ABS, airbag, transmission)
  • Implement automatic firmware updates without user intervention

MaxiAP

Reported bugs

4 issues
  • App crashes after firmware updates
  • Service functions not working as expected
  • Login and account issues
  • Diagnostic system initialization freezes

Requested features

4 requests
  • Update vehicle coverage more frequently
  • Improve app stability and reduce crashes
  • Provide offline mode for diagnostics
  • Dedicated iPad app with better UI

In-app purchases

10 purchases

U

One-time10
  • ABS Codes and definitions for Single Vehicle$5.99
  • ABS Code Vehicle 2$5.99
  • Live Data and Manufacturer Specific Codes Vehicle 1$7.99
Show 7 more
  • Airbag codes and definitions for vehicle 1$7.99
  • CodeConnect Repair Solutions for a Vehicle$12.99
  • Live Data and Manufacturer Specific Codes All Makes$15.99
  • CodeConnect Repair Solutions 1 Vehicle Upgrade to All$27.99
  • ABS Codes and Definitions All Vehicles$29.99
  • CodeConnect Repair Solutions All Vehicles$39.99
  • Airbag Codes and Definitions for All Makes$39.99
10 purchases

MaxiAP

One-time10
  • Dodge for one year$21.99
  • JEEP for one year$21.99
  • Honda for one year$21.99
Show 7 more
  • GM for one year$21.99
  • Nissan for one year$21.99
  • VW for one year$21.99
  • Ford for one year$21.99
  • Bmw for one year$21.99
  • Toyota for one year$21.99
  • Benz for one year$21.99

Questions

Is U free?
U is free to download, with in-app purchases available.
Is MaxiAP free?
MaxiAP is free to download, with in-app purchases available.
Which has better reviews, U or MaxiAP?
MaxiAP is rated higher. U averages 1.9 out of 5 from 124 ratings, while MaxiAP averages 2.2 from 167 ratings.
Do U or MaxiAP have ads?
Neither U nor MaxiAP shows ads.
Which is updated more often, U or MaxiAP?
U ships an update every 4 months, and MaxiAP every 6 weeks. Most recently, U was updated on November 6, 2026 and MaxiAP on November 8, 2026.

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