# Lineman's Reference - XFMR LAB — user reviews

> 45 indexed App Store user reviews of Lineman's Reference by Digital Apprentice LLC, rated 4.60/5 from 307 ratings.

- Source: https://appshunter.io/ios/app/linemans-reference-xfmr-lab/id1583878194/reviews
- App overview in markdown: https://appshunter.io/ios/app/linemans-reference-xfmr-lab/id1583878194.md
- Rating breakdown: 5★ 242 · 4★ 34 · 3★ 13 · 2★ 7 · 1★ 11

## What do users think of Lineman's Reference?

Overall sentiment: mixed

**Pros**

- 👍 Great for learning
- 👍 Helpful for apprentices
- 👍 Useful practice tool
- 👍 Good concept
- 👍 Excellent labs and sandbox
- 👍 Helps memorize bank building
- 👍 Great training reference
- 👍 Awesome app

**Cons**

- 🐛 Too many bugs
- 🐛 App is clunky
- 🐛 Wiring issues
- 🐛 Incorrect diagrams
- 🐛 Incorrect quiz answers
- 🐛 Voltmeter not working
- 🐛 Limited transformer options
- 🐛 Confusing connection requirements

**Commonly 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
- 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

**Most 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
- 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

## Newest reviews (12 of 45)

### 4/5 — WYE Delta is wrong

*2025-11-20, version 1.3.02*

Your eye delta is wrong. Other than that good app.

### 4/5 — Needs a bug fix

*2025-09-17*

Great app just noticed that on some of the banks you can’t bus the secondary x2 to x2 bushing for delta secondary’s.  It use to work but if the developers can fix that then it would get that 5th star in my book

**Developer response:** Why would you want to bus Delta secondaries across X2's? Delta secondary connections can only have one neutral reference. Unless I am misunderstanding you, which may be the case. Please reach out to me at info@digitalapprentice.net!

### 4/5 — Good app kinda confused

*2024-03-06*

How do you connect the h2 to the neutral everytime I tie them in I can get them to turn white but they come in upside down. How do I make them look like the picture ? I’m sure there is a way to do it but I’ve been messing with this app a few days and have yet to figure it out

**Developer response:** Can you please send a screenshot of your issue to info@digitalapprentice.net? I will be able to help you better there. Thanks!

### 4/5 — Almost perfect

*2024-02-14*

I’m using this app to practice my connections for my transformer class and it’s really really great well worth the 10$ but when I wire up a bank correctly it will tell me it’s wrong it only does this with the delta delta or the wye wye I will match them up perfectly with the image but still say it’s wrong I’ve even asked my teacher if they are wired correctly and he said yes. Once that gets fixed this app will be 5/5

**Developer response:** Thanks for the review! Can you please send screenshots of this issue to info@digitalapprentice.net so I can address this? Thanks!

### 3/5 — Fuse blows when nothings wrong

*2023-07-02, version 1.2.01*

When making a delta secondary hookup, when you attach the case grounds, the fuse blows and says it’s wrong. Not sure if it’s a bug or I’m im doing something wrong

### 4/5 — Paralleling

*2023-01-15, version 1.1.4*

Great app for guys to start understanding banks! Only issue is when paralleling cans. Rather than running the x3 and x1 to the same phase it wants you to run to opposite phases. That isn’t parallel, that’s a 240 secondary flash.

### 3/5 — Voltmeter doesn’t work and needs more labs!

*2022-12-11*

Cool app, but the voltmeter doesn’t work! It will not let you drop the leads to the voltmeter on the bottom two phases… this prevents you from doing the tests because in the test it tells you to check secondary voltage with the meter…

Also needs more labs! It’d be great if there were just more labs with different scenarios, or a feature like “customer needs 480 3 phase power for x load, pick the right transformer and hook up” type situations.

**Developer response:** Sorry that I just now saw your review. Thanks for the feedback. Not being able to check voltage on the horizontal secondaries was by design. The screen is not big enough to allow this, you must check voltage on the down leads from the transformers. 

Also, new labs are now available and I am constantly working on new updates, but am still a Journeyman Lineman full-time for a power company.

Let me know if you have any more questions! If you find this reply useful, please consider updating your review. info@digitalapprentice.net

### 3/5 — Okay

*2022-04-01, version 1.0.16*

Not to bad of an app. Wish you could pick what you want on the secondary side and primary side. Voltages, etc..

### 3/5 — Love the app but…

*2022-03-07*

Definitely some issues. I’ll wire up a bank correctly and it’ll tell me it’s wrong. I can delete my secondary’s and reconnect them exactly the same way and close the fuses again and it’ll say it’s right. Also, I’ll wire up a wye delta (for example) and it’ll say “this is a correct way to wire a delta delta bank” when obviously it should say wye delta. Lastly the app needs to be run with a horizontal screen but you can’t put the volt meter on the c phase secondary leads because of the layout. Still worth the $10 with the few issues it has

**Developer response:** Thanks for the review! I haven't had any reports until now about the labs telling you it it's wrong and then tell you it's right when you wire it up the same way. Let me know which lab is doing that and I'll take a look! Info@digitalapprentice.net Also, thanks for catching the wrong wording! That'll be fixed in the next update! I also spent a lot of time trying to figure out the best layout for everything to fit on such a small screen and how to check C phase. Thanks again!

### 3/5 — Different voltages

*2022-02-07, version 1.0.16*

I like the way this app is setup. Is there a way, maybe I’m not seeing it, to create a 277/480 and a straight 480 bank. To be able to get into the secondary windings and parallel them together manually?

### 4/5 — Good learning/practice tool

*2022-02-04*

Good learning/practice tool! Could use some minor adjustments such as easier access to lines(too close to bottom of screen), a way to look back at the bank you are building during a quiz (without restarting) and the addition of power banks. Overall good app though

**Developer response:** Thanks for the review! You can reference the lab's diagram when you receive the "Try Again" prompt.

### 3/5 — Wye delta

*2022-02-04, version 1.0.16*

Why does in make you tie in your high side h2 to ground. I had to reference back to my book to make sure I was right. Wye wye you tie wye delta you float

## Most critical reviews (10 lowest-rated)

### 1/5 — Tutorial

*2026-07-23, version 2.0.3*

Will not let me out of the tutorial I have completed it multiple times I just want to practice on banks and the different kind paid $20 and I can’t do anything but a tutorial over and over again

### 1/5 — Basically just use it as a normal diagram

*2024-08-25*

If you thought you’d be able to run a lot of different scenarios with this don’t bother. The app won’t let you do a ton of stuff and if you’re trying to use it to show an apprentice or something their mistake and recreate it digitally it almost certainly won’t accurately recreate that. Basically you build it correct or it doesn’t much do anything, not much point of this unless you really just want an interactive diagram because you can’t follow one that doesn’t have movable parts—which makes zero sense to me.

**Developer response:** This app is for learning transformer connections, not wiring up transformers in weird ways to see what happens. No where in the description of the app does it say you can "run a lot of different scenarios."
It will tell you basic things wrong with your wiring such as grounds missing, but yeah it won't tell you your phase angle displacement because it is not designed to.

### 1/5 — Shows wrong connection with right hook up

*2023-01-27*

I’ll make a connection and check work, shows right voltage but wrong connection. Check the system’s connection and it’s exactly the same. Refresh connection and it will show it as correct. Downloaded this for my apprentices but I can’t use this app and worry about confusion or frustration. Good theory, too many bugs…

**Developer response:** I have not had any more reports of this bug. Please send me a message at info@digitalapprentice.net with more info on this so I can get it corrected if there is an issue. I am always working on this app and always welcome feedback and corrections. Thanks!

### 1/5 — Dissatisfied

*2022-04-07, version 1.0.18*

I am very disappointed. There’s no option to select the transformers you want, no way to select primary voltage, no 277/480, no addictive/subtractive options. There’s a difference in knowing how to bank and knowing how to hook up a bank when told wye or delta.

### 2/5 — Great concept but to many bugs

*2026-05-14, version 1.3.02*

App is far to clunky, not worth using when you can only wire up 1/3 of the banks due to the lines not connecting.

### 2/5 — Wrong wiring in diagram

*2023-01-29, version 1.1.42*

The diagram for a 277/480 Wye/Wye bank is wrong. Also the H.V. on the transformer name plate on dual bushing transformer is wrong.

### 2/5 — Neat idea still needs work!

*2022-01-12*

Some neat information. Dislike that it doesn’t tell you what it would like you to correct just says something is wrong? Volt meter doesn’t work. I made a perfectly good connection and it kept blowing the doors?? I know this was right but assume someone didn’t know how to make the connection how are they supposed to learn from this app? It’s a neat idea but has lots of room for improvement hopefully my 10 dollar donation to what seems to be a unfinished product helps finish this app.

**Developer response:** Thanks for the review! I am currently working on more detailed reasons as to why it might be telling you that it is incorrect, and for now I am implementing an option for the corresponding diagram to be available in-lab when you get the "try again" message. I have received a lot of feedback these past two weeks and am working hard to get some updates out! It was brought to my attention yesterday that the volt meter sometimes get stuck on 120 or 240 but that it was mostly working. I have figured out why this is and am also implementing a fix to that in the next update.
Thanks again and stay safe!

### 3/5 — Good app, but not perfect

*2025-01-23*

I really like this app, I recommend it to my apprentices to learn the concept of banking transformers. What I do no like is that I can’t select to build banks with subtractive transformers. Not every system is less than 8kv. Also, when building a bank, if the wiring on the X bushings is not to the exact phase it’s drawn on the diagrams, it won’t accept the answer.

**Developer response:** Please reach out to me with screenshots of the secondary issues, this should not be the case. info@digitalapprentice.net

Also, a huge update is coming that will allow the users to change system voltage and therefore allow them to work with subtractive transformers.

Thanks!

### 3/5 — Okay app

*2023-12-31, version 1.2.22*

What I did not like is you can’t get a zero read on like phases it gives a 240 read when it is really a zero read this was wye delta bank straight 240

### 3/5 — Timmy

*2023-10-31*

Some of the answers in the advance quiz need to be fixed for the transformer selection question parts of the test. Selecting the correct transformer subtracts two points while selecting the improper voltage per nameplate is shown as correct. Please fix this as it could be confusing to anyone trying to learn.

**Developer response:** I will take a look at this ASAP, thanks for bringing this to my attention!
*Edit: I just ran through this quiz multiple times and found no issues with scoring. Please make sure you are choosing a transformer that is rated for phase to phase voltage when being tasked with a Delta Bank. If you continue to have issues, please send me an email at info@digitalapprentice.net so we can dive deeper and get these issues fixed! Thanks!

## Most praised reviews (10 highest-rated)

### 5/5 — Great for storm

*2026-07-11*

Excellent labs and sandbox, has literally everything

**Developer response:** Thanks for the review!

### 5/5 — Very useful!!!

*2026-01-22*

I’m a co-op student and I play around with this app a lot! It’s definitely going to help a lot in the future!!

**Developer response:** Thanks for the review! I'm glad you find it helpful!

### 5/5 — Good app

*2025-12-03, version 1.3.02*

Learning a lot from this app. Only problem I’ve come across is how to tie the H1/H2 bushings to the tank ground and neutral

### 5/5 — Very helpful

*2025-04-11*

The app has some flaws but nothing you can’t work around. Helped me a lot on learning transformer configurations.

**Developer response:** Please reach out to me at info@digitalapprentice.net with any issues so I can get them corrected. Thanks!

### 5/5 — Great training reference!

*2024-08-29*

This is a great app, let me just start with that.
It would be great if you could build your own banks and check voltage and what not. The set diagrams are awesome but being able to play around with different connections would make it better. Also tap changer settings and info would also be a great addition.

### 5/5 — Awesome app

*2024-08-06*

Awesome app helped me get my secondary connections down but it would be even better you guys added a create your own bank option just so guys can get a better grasp. Also be helpful if you could add a wye bank that stays in series. Hope to see more options in the future.

**Developer response:** I'm not sure what you mean by Wye banks staying in series? For it to be a wye bank you have to parallel the secondary coils. Reach out to me at info@digitalapprentice.net!

### 5/5 — Great for linemen

*2023-04-02*

Great app. Highly recommend for any apprentices or journeymen looking to brush up on their banking skills. Would love to see paralleling 3 phase banks in the future. I’ve had the app for a while and have noticed new features come up, like single phase paralleling and troubleshooting.

**Developer response:** Thanks for the review! 3 phase Paralleling is a great idea, I will add it to the list!

### 5/5 — Overall great app!

*2022-05-03*

I have no complaints about this app.. it has definitely helped me learn about constructing banks and it has put me buses ahead of other apprentices in my area. **One thing I do wish to see in the app is the Delta & Wye vector charts for both primary and secondary.** this would help greatly when learning how to build banks.

**Developer response:** Thanks for the review! I would love to add vectors in the future. Stay tuned and stay safe out there!

### 5/5 — Awesome!!!!

*2022-03-13*

Been a lineman for a few years and have always struggled understanding banks but this has made it easy and fun to memorize everything about bank building! Be your brothers keeper and share this app with them

**Developer response:** Thanks for the review! I'm glad this tool can help out seasoned lineman too!

### 5/5 — Transformer

*2022-01-20, version 1.0.16*

Any chance there is an update to add single bushing pots for the banks my co op uses them and this would be a great tool?

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-09.*