Best Otr Diagnostics Apps

232+ iOS apps curated and reviewed

4.3 avg rating
20 free apps
Updated July 2026

Out of 232+ otr diagnostics apps on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Otr Diagnostics Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1OTR DiagnosticsOTR DiagnosticsFree4.0★ (96)NoNoJul 2026
2Cummins GuidanzCummins GuidanzFree3.1★ (49)NoNoMay 2026
3OTR SolutionsOTR SolutionsFree4.9★ (2.7K)NoNoAug 2026
4Car Scanner | OBD Auto DoctorCar Scanner | OBD Auto DoctorFree4.4★ (6.1K)NoYesAug 2026
5BlueDriver OBD2 Scan ToolBlueDriver OBD2 Scan ToolFree4.6★ (14K)NoNoAug 2026
6Motive FleetMotive FleetFree4.7★ (1.7K)NoNoAug 2026
7FIXD OBD2 ScannerFIXD OBD2 ScannerFree4.6★ (26K)NoYesAug 2026
8DriveCentricDriveCentricFree4.6★ (7.9K)NoNoAug 2026

Top Picks for Otr Diagnostics

OTR Diagnostics#1

OTR Diagnostics by OTR Performance, Inc

Heavy-duty scan tool made easy
Editor's Choice
🔧 Utilities
4.0(96 ratings)
Free
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This app helps heavy-duty truck owners diagnose and resolve common issues like fault codes, regen problems, and derates. It provides plain-language explanations of error codes, allows for bi-directional commands to fix issues, and monitors live truck data to prevent downtime.

Cummins Guidanz#2

Cummins Guidanz by Cummins Inc.

Strong Contender
🔧 Utilities
3.1(49 ratings)
Free
Cummins Guidanz screenshot 1
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This app provides genuine service products and capabilities for Cummins equipment. It helps speed up repairs and improve customer uptime by offering fault code information, diagnostic tools, and repair guidance. It requires a Cummins datalink adapter for full functionality.

OTR Solutions#3

OTR Solutions by OTR Capital LLC

Worth Considering
💼 Business
4.9😐(2.7K ratings)
Free
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This app simplifies factoring and fuel management for truckers. Factor loads, fund fuel cards, and find savings on the go. Access broker information and manage your business from anywhere, anytime.

What We Love

  • 🚀 Easy to use
  • 👍 Great app
  • 👍 Helpful and friendly team
  • 👍 Excellent service

Room to Improve

  • 🐛 Slow app performance
  • 🐛 Frequent crashes
  • 🐛 Issues with uploading documents

More Otr Diagnostics apps to explore

4
Car Scanner | OBD Auto Doctor
Car Scanner | OBD Auto Doctor
Car Scanner | OBD Auto Doctor
OBD2 diagnostic for ELM 327
Free

Diagnose your car's engine light issues and monitor real-time performance data. This app allows you to read and clear diagnostic trouble codes, track fuel consumption, and view sensor data. It's a comprehensive tool for understanding your vehicle's health.

Read and clear OBD2 diagnostic trouble codes (DTC)Reset Check Engine LightMonitor real-time vehicle data and sensor readings
🔧 Utilities
(6.1K)
free with in-app purchases
5
BlueDriver OBD2 Scan Tool
BlueDriver OBD2 Scan Tool
BlueDriver OBD2 Scan Tool
Fear No Fix™
Free

This app turns your smartphone into a powerful OBD2 scan tool. It allows you to read and clear trouble codes, view live data, and generate detailed repair reports for your vehicle. Understand your car's issues and make informed repair decisions.

Read and clear trouble codes (Check Engine, ABS, etc.)Generate professional-grade Repair ReportsAccess Mode 6 and smog readiness data
📊 Productivity
(14K)
free with in-app purchases
6
Motive Fleet
Motive Fleet
Motive Fleet
Leading fleet management app
Free

This app provides real-time GPS tracking for vehicles, assets, and drivers on a single map. It monitors fleet health, ensures ELD compliance, and offers driver safety features with dashcam integration. Communicate directly with drivers and access 24/7 customer support.

Real-time GPS trackingFleet health monitoringELD compliance
💼 Business
(1.7K)
ad-supported
7
FIXD OBD2 Scanner
FIXD OBD2 Scanner
FIXD OBD2 Scanner
Clear Your Check Engine Light
Free

This app translates your car's diagnostic trouble codes into plain language, helping you understand potential issues and their severity. It provides maintenance reminders and offers advanced features like issue forecasting and emissions pre-checks with a premium subscription.

Translate check engine light codesUnderstand issue severityMaintenance reminders
🔧 Utilities
(26K)
free with in-app purchases
8
DriveCentric
DriveCentric
DriveCentric
by DriveCentric, Inc.
Free

This platform uses AI to streamline the automotive sales process, helping dealerships engage customers, book appointments, and increase sales. It offers mobile tools for managing leads, sending personalized videos, and tracking customer interactions from initial contact to final delivery.

Augmented Intelligence CRMCustomer engagement toolsAppointment scheduling
💼 Business
(7.9K)
free
9
RTS: Fuel, Factoring & Loads
RTS: Fuel, Factoring & Loads
RTS: Fuel, Factoring & Loads
Fuel up, find loads, get paid
Free

This comprehensive trucking app offers essential tools to streamline business operations. Find fuel savings, upload invoices for quick payment, and discover and book loads from an exclusive board. It simplifies fleet management, load entry, and invoicing.

Fuel savings at 3,000+ stationsInvoice upload for same-day paymentExclusive load board for booking
💼 Business
(13K)
free
10
ThinkDiag+
ThinkDiag+
ThinkDiag+
by THINKCAR INC
Free

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.

OE-level diagnostic functionsFull OBD II diagnosisSpecial maintenance functions
🔧 Utilities
(4K)
free with in-app purchases
11
ReconPro
ReconPro
ReconPro
by AutoMobile Technologies, Inc.
Free

Streamline automotive service operations with a comprehensive mobile and web solution. Create digital inspections, estimates, work orders, and invoices. Manage customer records, track commissions, and integrate with accounting software.

Paperless Inspections, Estimates, Work Orders, InvoicesConfigurable Visual Inspections with Interactive ImagesCustomer Records Management
💼 Business
(45)
free
12
ENCOMPASS® ELD
ENCOMPASS® ELD
ENCOMPASS® ELD
ELD MANDATE & HOURS OF SERVICE
Free

This app helps commercial drivers electronically capture hours-of-service data, replacing paper logs. It ensures compliance with ELD mandates and offers real-time alerts to prevent violations. Supports various vehicle classes and industry-specific rulesets.

Mandate-compliant ELDHours of service compliance alertsSupport for various HOS rulesets
💼 Business
(923)
free
13
OTR Clutch
OTR Clutch
OTR Clutch
by OTR Capital LLC
Free

This app offers an online banking solution tailored for trucking companies, providing unlimited cash back on debit purchases and helping to build business credit for financing options. It's a secure, FDIC-insured platform with no hidden fees or minimums.

Unlimited cash back on debit purchasesBuild business creditAccess to financing options
💰 Finance
(195)
free
14
ECU Connect
ECU Connect
ECU Connect
by EcuTek Technologies Limited
Free

This app allows you to program tuned files directly to your car's ECU using your phone. It also provides real-time engine performance monitoring and customizable dashboards. A Bluetooth interface is required for full functionality.

Program tuned ECU files wirelesslyReal-time engine performance monitoringCustomizable parameter dashboards
🔧 Utilities
(85)
free
15
CRM by DealerSocket
CRM by DealerSocket
CRM by DealerSocket
by SOLERA HOLDINGS, INC
Free

Manage customer relationships and sales tasks on the go. This mobile CRM allows you to search and add customers, scan VINs, find inventory, and send follow-up messages, all from your smartphone.

Search and add customersScan driver's license or VINFind inventory
💼 Business
(2.6K)
free
16
DealerCenter
DealerCenter
DealerCenter
by NOWCOM LLC
Free

Manage your dealership operations from anywhere with this comprehensive mobile solution. Streamline inventory management, customer relations, and deal tracking with powerful tools like VIN scanning and real-time lead engagement.

VIN scanning and decodingInventory management and marketing exportsReal-time CRM for lead engagement
💼 Business
(983)
freemium
17
GPSTab ELD
GPSTab ELD
GPSTab ELD
DOT compliant ELD / AOBRD
Free

This app provides truck drivers with FMCSA-approved electronic logs for Hours of Service (HOS) compliance. It offers GPS tracking, driver scorecards, and automated data collection for IFTA filings, helping to prevent violations and improve fleet efficiency.

FMCSA-approved ELD/AOBRDHours of Service (HOS) e-logsGPS fleet tracking
💼 Business
(169)
free with in-app purchases
18
Motive Driver
Motive Driver
Motive Driver
ELD, Safety and DVIR
Free

This app helps commercial drivers comply with Hours of Service (HOS) regulations using an electronic logging device (ELD). It also facilitates driver safety, dispatch management, vehicle inspections, and document uploads. Receive proactive alerts for HOS violations and communicate with fleet managers.

Electronic Hours of Service (HOS) loggingFMCSA complianceProactive HOS violation alerts
💼 Business
(12K)
ad-supported
19
Ezlogz: ELD & Truck Navigation
Ezlogz: ELD & Truck Navigation
Ezlogz: ELD & Truck Navigation
Truck GPS Tracking and Logbook
Free

This app provides a comprehensive suite of tools for truck drivers and fleet managers, including FMCSA-certified ELD, AI-powered chatbot for HOS queries, GPS navigation, and a load board. It aims to improve efficiency, safety, and compliance on the road.

FMCSA certified ELDHours of Service (HOS) alertsTruck GPS navigation
💼 Business
(2.8K)
free
20
TruckX - Electronic Logbook
TruckX - Electronic Logbook
TruckX - Electronic Logbook
ELD,Logbook, Offline HOS, DVIR
Free

This app provides FMCSA-approved ELD and fleet management solutions for commercial drivers and managers. It offers electronic logging, asset tracking, DVIRs, and IFTA reporting, with offline capabilities and 24/7 support.

FMCSA-approved ELD complianceElectronic Hours of Service (HOS) loggingDaily Vehicle Inspection Reports (DVIR)
💼 Business
(2.7K)
free

FAQ about Otr Diagnostics

What are the best otr diagnostics apps for iPhone?
OTR Diagnostics tops our otr diagnostics apps ranking as of July 2026, with a 4.0-star average from 96 App Store ratings, and it's free to download.
Yes — 20 of the top otr diagnostics apps we rank are free to download, including OTR Diagnostics and Cummins Guidanz.
OTR Diagnostics has no ads and has no in-app purchases, according to its App Store listing as of July 2026.
We track 232+ otr diagnostics apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
OTR Diagnostics is a heavy-duty truck scan tool that helps owners and fleets diagnose and resolve issues like fault codes, regen problems, and unexpected derates. It provides plain-language explanations of fault codes, allows for bi-directional commands to fix common problems, and monitors live truck data in real-time.
Key features include AI-powered fault code insights that break down complex codes into understandable terms, bi-directional commands to reset fault codes, aftertreatment systems, derates, and soot levels, and the ability to run forced DPF or SCR regens directly from the cab. It also offers live data monitoring for critical engine parameters.