Lineman's Reference vs KnowledgeVine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lineman's Reference
This app simulates electrical transformer banks, allowing users to practice wiring, metering, fusing, and faulting. It offers guided lessons for beginners and a sandbox mode for advanced customization and scenario-based challenges.
- Transformer bank simulation
- Guided training lessons
- Customizable sandbox mode
- Scenario-based challenges
- Interactive wiring and faulting
- Progress tracking and quizzes
- Reference diagrams and tools
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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
KnowledgeVine
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KnowledgeVine's Mobile app delivers KV Content to Users
Screenshots
Verdict
The clearest difference is price: KnowledgeVine at Free against Lineman's Reference's $19.99. Lineman's Reference's advantage is update cadence (every 4 weeks vs every 2 months) and chart position (#11 vs unranked). On ads, in-app purchases, 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
KnowledgeVine 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.
Lineman's Reference ships an update every 4 weeks, KnowledgeVine every 2 months. Both last shipped on November 7, 2026.
| Parameter | Lineman's Reference | KnowledgeVine |
|---|---|---|
| Price | $19.99 | Free — better |
| Rating | 4.7 (432 ratings) — better | — |
| Positive reviews | 62.2% of reviews | — |
| Number of ratings | 432 — better | — |
| Update frequency | Every 4 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #11 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 65 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Digital Apprentice LLC | Knowledge Vine, LLC |
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 moreShow fewer
- 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 moreShow fewer
- 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
KnowledgeVine
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Lineman's Reference
No in-app purchases
KnowledgeVine
No in-app purchases
Questions
Is Lineman's Reference free?
Is KnowledgeVine free?
Do Lineman's Reference or KnowledgeVine have ads?
Which is updated more often, Lineman's Reference or KnowledgeVine?
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