Comparison

Equipment Service Tool vs J1939FaultCode

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

Head to head
About

Equipment Service Tool

This utility app helps heavy equipment professionals diagnose issues with fault code searches and perform essential calculations. It includes tools for Ohm's Law, unit conversions, and refrigerant charging, supporting numerous manufacturers.

Highlights
  • Fault code search (J1939 SPN/FMI)
  • Ohm's Law calculator
  • Unit conversion tool
  • Refrigerant charge calculator
  • Support for multiple heavy equipment manufacturers
  • Regular updates
Features
Read full description

Equipment Service Tool: Your Ultimate Heavy Equipment Companion! Gear up for unparalleled efficiency in heavy equipment maintenance with our iOS app, Equipment Service Tool. Tailored to meet the demands of professionals like you, this app is your go-to solution for fault code searches, essential calculations, and unit conversions, transforming the way you handle heavy machinery. Fault Code Search: Diagnose and resolve issues swiftly with our extensive fault code search feature. Designed for leading manufacturers including Allison, Bomag, Cummins, Deutz, Ghel, Hyundai, Mustang, Manitou, XCMG, and more. Equipment Service Tool provides detailed J1939 SPN and FMI codes for a seamless troubleshooting experience. Tools for Precision: Empower yourself with a suite of productivity tools: Ohm's Law Calculator: Calculate voltage, current, resistance, and power effortlessly. Unit Conversion: Streamline your work by converting pressure, temperature, and flow into different units with accuracy. Refrigerant Charge Calculator: Engineered for HVAC technicians, our app includes a specialized calculator for refrigerant charge by temperature. Ensure optimal cooling in R134a systems with precise calculations at your fingertips. Expanding Manufacturer Support: Stay ahead of the curve with our commitment to continuous improvement! Equipment Service Tool is dedicated to expanding its fault code database, adding support for additional manufacturers to keep you at the forefront of heavy equipment maintenance. Key Features: Intuitive fault code search with J1939 SPN and FMI codes. Tools for Ohm's Law, unit conversions, and refrigerant charge calculations. Manufacturer support for Bomag, Cummins, Deutz, Hyundai, XCMG, and more. Regular updates with additional manufacturer support and features. For Professionals, By Professionals: Developed with insights from industry experts, Equipment Service Tool is crafted to meet the unique needs of heavy equipment professionals. Whether you're a seasoned technician or a novice in the field, our app is your indispensable companion for efficient and accurate maintenance. Download Equipment Service Tool Now and Master Heavy Equipment Maintenance! Upgrade your toolkit and elevate your performance with the ultimate iOS app for heavy equipment professionals. Embrace precision, streamline workflows, and conquer challenges – all at your fingertips! --- Monthly subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage your subscription and turn off auto-renewal in your Account Settings after purchase. Privacy Policy: https://projects.voltare.us/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

J1939FaultCode

Features
Read full description

J1939 FaultCode is a practical offline diagnostic reference tool for commercial vehicle technicians, fleet maintenance teams, and engineers. Quickly look up J1939 SPN parameters, FMI definitions, combined DTC meanings, and brand-specific fault code mappings. The app is designed for fast field use, with built-in data and no internet connection required for core lookup features. Main features: Search SPN codes by number or keyword View FMI definitions with clear explanations Query DTC combinations using SPN + FMI Check common causes and repair suggestions Browse brand-specific fault code mappings Save frequently used codes to Favorites Review recent lookup history Switch between English and Chinese Works offline after installation Whether you are troubleshooting engine, aftertreatment, fuel, sensor, electrical, or communication faults, J1939 FaultCode helps you find useful reference information quickly and consistently.

Screenshots

Equipment Service Tool4 screens
J1939FaultCode4 screens

Verdict

The call

The clearest difference is in-app purchases: J1939FaultCode at none against Equipment Service Tool's 2. J1939FaultCode also leads on ads (none vs shown) and update cadence (every 4 days vs every 2 months). On price, device support and iOS requirement 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. Equipment Service Tool sells 2 in-app purchases, starting at $0.99 per month. J1939FaultCode asks for nothing beyond the download.

UpkeepUpdate frequency

Equipment Service Tool ships an update every 2 months, J1939FaultCode every 4 days. The most recent releases landed on July 8, 2026 and September 18, 2026 respectively.

Scorecard3 real differences · 7 level
Equipment Service Tool versus J1939FaultCode: the parameters behind the verdict, then further details
ParameterEquipment Service ToolJ1939FaultCode
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 2 monthsEvery 4 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.016.0 — better
Further details — not scored
Size7 MB11 MB
Age rating12+4+
DeveloperKaleb Simpson洋 刘

In-app purchases

2 purchases

Equipment Service Tool

Subscriptions1
  • Pro - One Month$0.991 Month
One-time1
  • Lifetime Unlock$9.99
None

J1939FaultCode

No in-app purchases

Questions

Is Equipment Service Tool free?
Equipment Service Tool is free to download, with in-app purchases available.
Is J1939FaultCode free?
J1939FaultCode is free to download, with no in-app purchases.
Do Equipment Service Tool or J1939FaultCode have ads?
Equipment Service Tool shows ads; J1939FaultCode does not.
Which is updated more often, Equipment Service Tool or J1939FaultCode?
Equipment Service Tool ships an update every 2 months, and J1939FaultCode every 4 days. Most recently, Equipment Service Tool was updated on July 8, 2026 and J1939FaultCode on September 18, 2026.

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