As of 10 Nov 2026, Lineman's Reference - XFMR LAB is #14 in Paid · Education in the United States, the one tracked chart it's in. Over the last 7 days its biggest climb was 23 places, to #14 in Paid · Education in the United States. Its best rank in the last 7 days was #9 in Paid · Education in the United States. Appulse Index first saw Lineman's Reference - XFMR LAB in a tracked chart on 8 Oct 2026. Since then it has charted on 34 days in 3 countries, with a best rank of #8 in Paid · Education in the United States on 16 Oct 2026.
Current rank
#14United States · Paid · Education
- Was
- #377 days ago
- Change
- Up 23 placesover 7 days
- Best
- #9in 7 days
- Longest chart run
- 34 daysUnited States · Paid · Education
- New ratings, 7 days
- +10United States · since 29 Oct 2026
Chart record
Every tracked chart, country and day since Appulse Index first saw this app in a chart.
What's new
Version 2.0.8 · 9 days ago
Maintenance update. - Delta Wye Closed: a long ground strap now clears when the coils are paralleled back. - Live classes: a queue edit or catch-up from your instructor reaches your phone even if it was asleep.
Ranking events
- Dropped #30 → #67 in Paid · EducationCanada
- Entered the Paid · Education chart at #30Canada
- Climbed #37 → #11 in Paid · EducationUnited States
- New version 2.0.8 (was 2.0.7)
- Dropped #29 → #70 in Paid · EducationAustralia
- Entered the Paid · Education chart at #29Australia
Show 7 earlier events
- Dropped #30 → #77 in Paid · EducationCanada
- Dropped #17 → #46 in Paid · EducationCanada
- New version 2.0.7 (was 2.0.6)
- Entered the Paid · Education chart at #17Canada
- Entered the Paid · Education chart at #17Canada
- Dropped #46 → #81 in Paid · EducationCanada
- Entered the Paid · Education chart at #21Canada
About
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
Ranks come from Apple's public App Store charts, checked once a day. Appulse Index isn't affiliated with Apple.
Rank history
Higher on the chart is better: #1 is at the top.
Sign in to see 30 days, 90 days and all history.
United States · Paid · Education: best #9, latest #14, over 7 snapshots since 4 Nov.
In 1 chart now
| Chart | Rank | 24 h | 7 days | Best | Days on chart |
|---|---|---|---|---|---|
| United States· Paid · Education · best #5 · 34 days · 7 days Up 23 places | #14 | Up 4 places | Up 23 places | #5 | 34 |
Competitors
Compare with the top 3Full chartTop of Paid · Education in United States. Lineman's Reference - XFMR LAB is #14 there. Changes are over 7 days.
- #1 (number one)No change
AnkiMobile FlashcardsAnki Software, LLC - #2Up 1 place
SkyView®Terminal Eleven LLC - #3Down 1 place
HamStudy.orgSignal Stuff - #4No change
- #5Up 1 place
Teach Your Monster to ReadTeach Your Monster - #6Down 1 place
Stack the States®Freecloud Design, Inc. - #7Up 3 places
Wagotabi: Learn JapaneseWAGOTABI LIMITED - #8Up 28 places
Stack the Countries®Freecloud Design, Inc. - #9Down 1 place
608 PracticeAfter Hours Data Systems LLC - #10Up 8 places
ABA WizardTYSM Technologies, LLC - #11Up 3 places
PDG PROmote 2026+ForceReadiness.com - #12Up 7 places
- #13Up 59 places
TX Real Estate Exam FlashcardsChampions School of Real Estate - #15Up 38 places
Spelling ShedEducation Shed Ltd - #16Up 1 place
Private Pilot Test PrepSporty's Pilot Shop - #17Up 4 places
- #18Down 7 places
PROmote - Army Study GuideForceReadiness.com - #19Up 4 places
TLC Practice exam 2.0Los Gatos Taxi Innovators - #20Up 14 places
Elmo CallsSesame Workshop (Apps) - #21Up 1 place
California Firearms TestAlphaSquare Technologies Inc.
Screenshots
More from Digital Apprentice LLC
| App | Best rank now | Released | App Store |
|---|---|---|---|
 Lineman's Reference - URDEducation · | Paid · EducationUnited States#30 |
As of 10 Nov 2026, Lineman's Reference - XFMR LAB is #14 in Paid · Education in the United States, the one tracked chart it's in. Over the last 7 days its biggest climb was 23 places, to #14 in Paid · Education in the United States. Its best rank in the last 7 days was #9 in Paid · Education in the United States. Appulse Index first saw Lineman's Reference - XFMR LAB in a tracked chart on 8 Oct 2026. Since then it has charted on 34 days in 3 countries, with a best rank of #8 in Paid · Education in the United States on 16 Oct 2026.
Store listing
How the app presents itself on the App Store. Select a screenshot to open it full size.
App facts
What Apple publishes about this app. Ratings are from one country's App Store.
- Price
- $19.99
- Rating
- 4.7 / 5 stars427 ratings United States
- Released
- 12 Sep 2021
- Last update
- Version 2.0.8
- Requires
- iOS 16.0or later
- Size
- 68.4 MB
- Languages
- 1
Chart record
Every tracked chart, country and day since Appulse Index first saw this app in a chart.
Rank history
Higher on the chart is better: #1 is at the top.
Sign in to see 30 days, 90 days and all history.
United States · Paid · Education: best #9, latest #14, over 7 snapshots since 4 Nov.
Current rankings
Every chart this app is in right now, best position first.
| Chart | Rank | 24 h | 7 days | Best | Days on chart |
|---|---|---|---|---|---|
| United States· Paid · Education · best #5 · 34 days · 7 days Up 23 places | #14 | Up 4 places | Up 23 places | #5 | 34 |
Ranking events
Entries, big moves, #1s and new versions we've recorded, by day.
- Dropped #30 → #67 in Paid · EducationCanada
- Entered the Paid · Education chart at #30Canada
- Climbed #37 → #11 in Paid · EducationUnited States
- New version 2.0.8 (was 2.0.7)
- Dropped #29 → #70 in Paid · EducationAustralia
- Entered the Paid · Education chart at #29Australia
- Dropped #30 → #77 in Paid · EducationCanada
- Dropped #17 → #46 in Paid · EducationCanada
- New version 2.0.7 (was 2.0.6)
- Entered the Paid · Education chart at #17Canada
- Entered the Paid · Education chart at #17Canada
- Dropped #46 → #81 in Paid · EducationCanada
- Entered the Paid · Education chart at #21Canada
Competitors
Compare with the top 3Full chartTop of Paid · Education in United States. Lineman's Reference - XFMR LAB is #14 there. Changes are over 7 days.
- #1 (number one)No changeAnkiMobile FlashcardsAnki Software, LLC
- #2Up 1 placeSkyView®Terminal Eleven LLC
- #3Down 1 placeHamStudy.orgSignal Stuff
- #4No change
- #5Up 1 placeTeach Your Monster to ReadTeach Your Monster
- #6Down 1 placeStack the States®Freecloud Design, Inc.
- #7Up 3 placesWagotabi: Learn JapaneseWAGOTABI LIMITED
- #8Up 28 placesStack the Countries®Freecloud Design, Inc.
- #9Down 1 place608 PracticeAfter Hours Data Systems LLC
- #10Up 8 placesABA WizardTYSM Technologies, LLC
- #11Up 3 placesPDG PROmote 2026+ForceReadiness.com
- #12Up 7 places
- #13Up 59 placesTX Real Estate Exam FlashcardsChampions School of Real Estate
- #14Up 23 places
Lineman's Reference - XFMR LABThis app - #15Up 38 placesSpelling ShedEducation Shed Ltd
- #16Up 1 placePrivate Pilot Test PrepSporty's Pilot Shop
- #17Up 4 places
- #18Down 7 placesPROmote - Army Study GuideForceReadiness.com
- #19Up 4 placesTLC Practice exam 2.0Los Gatos Taxi Innovators
- #20Up 14 placesElmo CallsSesame Workshop (Apps)
- #21Up 1 placeCalifornia Firearms TestAlphaSquare Technologies Inc.
About
From the app's App Store listing.
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
What's new
Version 2.0.8 · 31 Oct 2026 ·
Maintenance update.
- Delta Wye Closed: a long ground strap now clears when the coils are paralleled back.
- Live classes: a queue edit or catch-up from your instructor reaches your phone even if it was asleep.
More from Digital Apprentice LLC
Their other apps that Appulse has seen in the charts, charting ones first.
| App | Best rank now | Released | App Store |
|---|---|---|---|
Lineman's Reference - URDEducation · | Paid · EducationUnited States#30 |
Ranks come from Apple's public App Store charts, checked once a day. Appulse Index isn't affiliated with Apple.