# Lineman's Reference vs Pocket MUTCD

The clearest difference is price: Pocket MUTCD at Free against Lineman's Reference's $19.99. Pocket MUTCD also leads on update cadence (every 4 days vs every 4 weeks). Lineman's Reference's advantage is in-app purchases (none vs 6) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Pocket MUTCD is free to download; Lineman's Reference costs $19.99 up front. Pocket MUTCD sells 6 one-off in-app purchases. Lineman's Reference asks for nothing beyond the download.

Lineman's Reference ships an update every 4 weeks, Pocket MUTCD every 4 days. The most recent releases landed on October 18, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Lineman's Reference | Pocket MUTCD |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | **[4.6 (307 ratings)](https://appshunter.io/ios/app/linemans-reference-xfmr-lab/id1583878194/reviews)** | — |
| Number of ratings | **307** | — |
| Positive reviews | 62.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Every 4 days** |
| Monetization | Free | — |
| Best chart rank | **#25** | — |
| Size | 65 MB | 101 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Digital Apprentice LLC](https://appshunter.io/developer/1565687382) | [Trucking Lab, LLC](https://appshunter.io/developer/1800341934) |

## What reviewers say

### Lineman's Reference

[App page](https://appshunter.io/ios/app/linemans-reference-xfmr-lab/id1583878194)

**Currently charting:** #25 Top Paid · Education (US App Store)

This interactive simulator allows users to study and learn transformer connections. Test your wiring with various meters, and experience consequences of improper connections. Includes reference diagrams, informational material, and a quiz mode to test knowledge.

**Highlights:** Transformer connection simulation, Volt, ohm, and rotation meters, Abnormal voltage and fuse explosion simulation, Transformer nameplate and coil inspection, Quick reference diagrams, Informational reading material, Quiz and advanced quiz modes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Great for learning
- 👍 Helpful for apprentices
- 👍 Useful practice tool
- 👍 Good concept
- 👍 Excellent labs and sandbox

**What reviewers complain about**

- 🐛 Too many bugs
- 🐛 App is clunky
- 🐛 Wiring issues
- 🐛 Incorrect diagrams
- 🐛 Incorrect quiz answers

**Reported bugs**

- Tutorial loop
- Lines not connecting
- Cannot wire up all banks
- WYE Delta is wrong
- Cannot bus secondary x2 to x2 bushing for delta secondaries

**Requested features**

- Ability to build own banks
- Add tap changer settings
- Add vector charts
- Add more labs with different scenarios
- Create your own bank option


### Pocket MUTCD

[App page](https://appshunter.io/ios/app/pocket-mutcd/id6760436333)

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support $3 | $2.99 | one-time |
| Support $5 | $4.99 | one-time |
| Remove Ads Forever | $7.99 | one-time |
| Support $10 | $9.99 | one-time |
| Support $20 | $19.99 | one-time |
| Support $100 | $99.99 | one-time |


## Frequently asked questions

### Is Lineman's Reference free?

Lineman's Reference costs $19.99, with no in-app purchases.

### Is Pocket MUTCD free?

Pocket MUTCD is free to download, with in-app purchases available.

### Do Lineman's Reference or Pocket MUTCD have ads?

Pocket MUTCD shows ads; Lineman's Reference does not.

### Which is updated more often, Lineman's Reference or Pocket MUTCD?

Lineman's Reference ships an update every 4 weeks, and Pocket MUTCD every 4 days. Most recently, Lineman's Reference was updated on October 18, 2026 and Pocket MUTCD on October 16, 2026.

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