Comparison

Lineman's Reference vs TradeSchool Mobile

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

Head to head
About

Lineman's Reference

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
Read full description

Learn it. Wire it. Energize it. Check your work. Built by a working journeyman lineman for linemen and their apprentices. The XFMR Lab simulates distribution transformer banks driven by your own wiring — the metering, fusing, and faulting all behave the way you'd expect in the field. NEW IN 2.0 — BUILT-IN TRANSFORMER TRAINING (Replacing XFMR INFO) Six guided lessons take you from "what's a transformer?" to wiring a 3-pot bank: • Start Here — What is a Transformer? • Dual H Bushings — The Two Wirings & the Nameplate • The Tap Changer — One Pot, Multiple System Voltages • Three-Phase — The Three Phases and How They're Related • Bank Identification — Delta or Wye, Open or Closed • Your First Bank: Delta-Wye Closed (120/208) • More lessons on the way! Work the lessons in order, or jump straight to the labs. ALSO NEW IN 2.0 • The Sandbox (Beta) — wire anything from scratch in a COMPLETELY-customizable lab, with live, vector-based voltage and fault logic baked in. • Death Traps — scenario-based transformer traps linemen run into — and how to navigate them safely. • A brand-new look across every lab — new graphics, sharper, faster, & easier to read in the field. • Voltmeter you can now drag with two fingers; readings update as the leads move. • Parallel the secondary coils by hand in wye secondary labs • Stats that track lab completions, quiz scoring and for-fun stuff like the number of fuses you've blown. • User Customizations - the user can now alter the spec of their labs; from grounding to parallel coil cutover-direction, requiring the 4th cutout, tap changer implementation and more. • 2.0 is FREE for everyone who already owns XFMR Lab — thank you for years of feedback and encouragement. WHAT YOU GET Single Phase — Single Bushing · Dual Bushing Three Phase (closed) — Delta-Delta · Delta-Wye · Wye-Delta · Wye-Wye Three Phase (open) — Open Delta-Delta · Open Wye-Delta Misc — Paralleling · 4th Cutout · Death Traps (6 Scenarios) Advanced — Straight 480 · 240/480 · 277/480 · Corner-Grounded 240/480 · Wye-Wye 5-Wire (120/240 + 120/208) - all now able to be wired up Wye AND Delta on the topside The Sandbox (Beta) EVERY FUTURE UPDATE IS FREE - THE APP IS A ONE-TIME PURCHASE. I'm always working on new updates. TOOLS & REFERENCE • Volt, ohm and rotation meters with real behavior • Nameplate, secondary coil and tap changer animations • Reference diagrams for every standard bank Learning Mode walks apprentices through every wrong-connection check. Journeymen and experienced users can keep this turned off if they'd like. QUIZZES • Classic Quiz — Select each lab you want in your quiz - with graded scoring across each lab. • Advanced Quiz — You're provided with the job-site info and need to pick the right nameplate and coil setup, then wire it. • Bank ID - A beginner's quiz tied into the new XFMR Training lesson plan. The user is provided with different primary and secondary wirings and must correctly identify them. Used by 30,000+ linemen since 2021. Questions? Suggestions? Reach me at info@digitalapprentice.net

About

TradeSchool Mobile

Manage your tradeschool experience with this app. It helps you keep track of class schedules, assignments, academic performance, and tuition payments all in one place. Stay organized and efficient throughout your studies.

Highlights
  • Access class schedules
  • Manage assignments
  • Track academic progress
  • Monitor performance
  • Receive reminders and notifications
  • Consolidate tradeschool tools
Features
Read full description

Introducing TSM - Trade School Manager, the ultimate app for tradeschool students to effortlessly manage their accounts! With TSM, say goodbye to the hassle of juggling multiple platforms and tools. Our easy-to-use app consolidates everything you need in one convenient place. Stay on top of your class schedules, assignments, and tuition payments all from the palm of your hand. Key Features: - Access class schedules and course materials - Manage assignments and track progress - Monitor your academic performance - Receive important reminders and notifications Download TSM - Trade School Manager today and unlock a seamless, organized, and efficient tradeschool experience!

Screenshots

Lineman's Reference4 screens
TradeSchool Mobile4 screens

Verdict

The call

The clearest difference is price: TradeSchool Mobile at Free against Lineman's Reference's $19.99. TradeSchool Mobile also leads on update cadence (every 6 days vs monthly). Lineman's Reference's advantage is rating (4.7 vs 4.1) and review sentiment (62% vs 37%). On ads, in-app purchases, monetization model and device support 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

TradeSchool Mobile is free to download; Lineman's Reference costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Lineman's Reference holds the better App Store score, 4.7 against 4.1. That said, the two scores are not equally well evidenced: Lineman's Reference has 419 ratings behind it against 52, so its average is the more settled of the two. Written reviews point the same way: 62% of Lineman's Reference's written reviews are positive against 37% of TradeSchool Mobile's.

UpkeepUpdate frequency

Lineman's Reference ships an update monthly, TradeSchool Mobile every 6 days. Both last shipped on October 30, 2026.

Scorecard6 real differences · 5 level
Lineman's Reference versus TradeSchool Mobile: the parameters behind the verdict, then further details
ParameterLineman's ReferenceTradeSchool Mobile
Price$19.99Free — better
Rating4.7 (419 ratings) — better4.1 (52 ratings)
Positive reviews62.2% of reviews — better37.1% of reviews
Number of ratings419 — better52
Update frequencyMonthlyEvery 6 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
Best chart rank#15 — better—
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.015.0 — better
Further details — not scored
Size65 MB29 MB
Age rating4+4+
DeveloperDigital Apprentice LLCTradeSchool

Customer experience

Lineman's Reference

All ratings407 ratings
Positive91.9%
Neutral3.4%
Negative4.7%
Written reviews45 reviews
Positive62.2%
Neutral22.2%
Negative15.6%

TradeSchool Mobile

All ratings52 ratings
Positive80.8%
Neutral1.9%
Negative17.3%
Written reviews35 reviews
Positive37.1%
Neutral8.6%
Negative54.3%

Bugs and requests

Lineman's Reference

Reported bugs

33 issues
  • Tutorial loop
  • Lines not connecting
  • Cannot wire up all banks
  • WYE Delta is wrong
  • Cannot bus secondary x2 to x2 bushing for delta secondaries
Show 28 more
  • Cannot select subtractive transformers
  • Wiring on X bushings not to exact phase
  • H2 to neutral connection issues
  • WYE Delta bank gives wrong voltage read
  • Fuse blows when attaching case grounds in delta secondary
  • Wrong wiring in diagram for 277/480 Wye/Wye bank
  • HV on transformer name plate is wrong
  • Shows wrong connection with right hook up
  • Paralleling cans connection issue
  • Voltmeter does not work
  • Cannot drop leads to voltmeter on bottom two phases
  • No option to select transformers
  • No option for primary voltage
  • No 277/480 option
  • No additive/subtractive options
  • Cannot pick secondary and primary side voltages
  • App tells user bank is wrong when it's correct
  • App incorrectly identifies bank type
  • Cannot put voltmeter on C phase secondary leads in horizontal screen
  • Cannot create 277/480 and straight 480 banks
  • Cannot manually parallel secondary windings
  • Lines too close to bottom of screen
  • Cannot look back at bank during quiz
  • High side H2 tied to ground in WYE delta
  • Only allows 120/240 or 120/208 hookups
  • Voltmeter not reading correctly when paralleling
  • App says something is wrong but doesn't specify correction
  • App keeps blowing doors on a correct connection

Requested features

23 requests
  • Ability to build own banks
  • Add tap changer settings
  • Add vector charts
  • Add more labs with different scenarios
  • Create your own bank option
Show 18 more
  • Add a WYE bank that stays in series
  • Add hints button
  • Add power banks
  • Add single bushing pots
  • Add 480 banks
  • Include transformers of different polarities
  • Add 4th cutout to WYE delta banks
  • Add additive and subtractive transformers
  • Select transformers from a list
  • Tie three phase secondary legs on open secondary lines
  • Add lighter bank category
  • Expand into metering
  • Add open delta WYE bank
  • Practice drawing vectors
  • See vectors for transformers
  • Ability to cut over pots
  • Add 240/480/277 and 277/480 options
  • More in-depth internals

TradeSchool Mobile

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Lineman's Reference

No in-app purchases

None

TradeSchool Mobile

No in-app purchases

Questions

Is Lineman's Reference free?
Lineman's Reference costs $19.99, with no in-app purchases.
Is TradeSchool Mobile free?
TradeSchool Mobile is free to download, with no in-app purchases.
Which has better reviews, Lineman's Reference or TradeSchool Mobile?
Lineman's Reference is rated higher. Lineman's Reference averages 4.7 out of 5 from 419 ratings, while TradeSchool Mobile averages 4.1 from 52 ratings.
Do Lineman's Reference or TradeSchool Mobile have ads?
Neither Lineman's Reference nor TradeSchool Mobile shows ads.
Which is updated more often, Lineman's Reference or TradeSchool Mobile?
Lineman's Reference ships an update monthly, and TradeSchool Mobile every 6 days. Most recently, Lineman's Reference was updated on October 30, 2026 and TradeSchool Mobile on October 30, 2026.

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