# Equipment Service Tool vs J1939FaultCode

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.

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.

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.

## The numbers

| Metric | Equipment Service Tool | J1939FaultCode |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/equipment-service-tool/id6473715814/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 11 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Kaleb Simpson](https://appshunter.io/developer/1719568849) | [洋 刘](https://appshunter.io/developer/6775317751) |

## What reviewers say

### Equipment Service Tool

[App page](https://appshunter.io/ios/app/equipment-service-tool/id6473715814)

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:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro - One Month | $0.99 | per month |
| Lifetime Unlock | $9.99 | one-time |


### J1939FaultCode

[App page](https://appshunter.io/ios/app/j1939faultcode/id6778431735)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*