# Power Grid Operator Exam Prep — For NERC Certification Tests

> NERC System Operator Certification exam preparation and simulator. (iPhone/iPad app by PATRICK ANTHONY RODRIGUES.)

- Source: https://appshunter.io/ios/app/power-grid-operator-exam-prep/id6814519820 (this page in markdown: same URL + `.md`)
- Developer: [PATRICK ANTHONY RODRIGUES](https://appshunter.io/developer/6806796087)
- Category: Education, Reference
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 26.0 · 7 MB
- Languages: American English
- Released: 2026-09-22
- Data updated: 2026-10-11
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/power-grid-operator-exam-prep/id6814519820/reviews.md

## What is Power Grid Operator Exam Prep?

Power Grid Operator Exam Prep is an independent trainer for the four System
Operator Certification examinations of the North American Electric Reliability
Corporation (NERC): Reliability Coordinator (RC); Balancing, Interchange and
Transmission (BT); Transmission Operator (TO); and Balancing and Interchange (BI).

ONE BANK, FOUR CREDENTIALS
All four examinations are drawn from the same six content domains and 31
knowledge areas; only the number of scored questions per area changes, and that
table is published. Pick your credential and the whole app re-weights: your
readiness estimate, your weak areas and how a mock paper is sampled. Every
answer counts towards all four.

SCORED THE WAY THE EXAMINATION IS
NERC passes candidates on an absolute cut score, not a percentage: 92 of 120 for
RC and BT, 76 of 100 for TO and BI. So the headline figure is a projected score
out of the paper, and weak areas are ranked by how many scored questions they
are costing you.

MOCK PAPERS SAMPLED TO THE OUTLINE
A mock paper draws exactly the number of questions the content outline lists
for each of the 31 knowledge areas. Three hours, flag and return freely, no
feedback until you submit, then a full review with an explanation and a
reference on every question.

NEW: THE CONTROL-ROOM SIMULATOR
Take a shift at the BA, TOP or RC desk in nine scenarios, from a unit trip at
the evening peak and an IROL exceedance against its Tv to EEA 3, a lost EMS,
voice paths down and an evacuated control room. One model runs the system and
the clock stops at each decision: read the live displays, choose what to do or
answer a three-part communication, then watch it play out. The debrief counts,
never as a percentage, the obligations you met or missed against the
standards' own clocks, and explains every decision. Every number is tagged as a
NERC figure, a value your company or RC sets, or a model assumption. New
numbers every run.

GENERATED DISPLAYS, NEW EVERY TIME
• a six-bus one-line with flows, ratings and an N-1 contingency analysis
  report: find the worst contingency and decide what it obliges you to do;
• a Balancing Authority AGC control board, with the ACE left for you to
  calculate.
Plus twenty calculation drills with worked solutions.

1,224 ORIGINAL QUESTIONS
Written from the freely published sources (the content outlines, the NERC
Glossary of Terms and the enforceable Reliability Standards) and checked again
by a separate pass. Each carries NERC's cognitive level: recall,
application or analysis.

FREE TO START, ONE PRICE FOR EVERYTHING
Try it free: 50 practice questions in any mode, one full mock paper, one
simulator run of any scenario, and every Library card. Full Access is a single
in-app purchase that unlocks every question, unlimited mock papers on all four
credentials, every trainer and all nine scenarios. One-time, no subscription,
on your iPhone, iPad and Mac.

ALSO INSIDE
• 31 Library reference cards: seven must-know numbers and a short essay each
• Choose an answer, then confirm it to see the explanation and its reference;
  A–D, 1–4 and Return work on a keyboard
• Spaced repetition brings back what you miss
• Works offline, and syncs through your own iCloud. No account, no data collected.
• Light and dark, with a manual override for a night shift

NOT AFFILIATED
Power Grid Operator Exam Prep is an independent study aid. It is not affiliated
with, endorsed by, or connected to the North American Electric Reliability
Corporation, its Regional Entities, or Pearson VUE. NERC, the credential names
and the examination codes are used only to identify the examinations this app
prepares for. All content is original work. The simulator is a study aid: it is
not approved by NERC and grants no continuing-education hours.

Reliability Standards are revised regularly. Verify any requirement against the
currently enforceable standard at nerc.com, and against your own entity's
operating procedures, before operational use.

## Key features

- Four NERC certification exams covered
- Adaptive readiness estimation
- Mock papers sampled to outline
- Control-room simulator with scenarios
- Generated displays and calculation drills
- 1,224 original practice questions


## Frequently asked questions about Power Grid Operator Exam Prep

### What NERC certifications does Power Grid Operator Exam Prep cover?

Power Grid Operator Exam Prep covers the four System Operator Certification examinations of the North American Electric Reliability Corporation (NERC): Reliability Coordinator (RC), Balancing, Interchange and Transmission (BT), Transmission Operator (TO), and Balancing and Interchange (BI).

### How does Power Grid Operator Exam Prep simulate the actual exam scoring?

The app projects your score out of the total paper and ranks weak areas by how many scored questions they are costing you, mirroring NERC's absolute cut score system rather than a percentage.

### What is included in the Control-Room Simulator feature?

The simulator offers nine scenarios where you can take a shift at the BA, TOP, or RC desk. It presents realistic system models and decision points, followed by a debrief that counts your met obligations against standards.

### How many practice questions are available in Power Grid Operator Exam Prep?

The app contains 1,224 original practice questions, all written from freely published NERC sources and checked for accuracy. These questions are tagged with NERC's cognitive levels: recall, application, or analysis.

### What is the pricing model for Power Grid Operator Exam Prep?

The app is free to start, offering 50 practice questions, one mock paper, one simulator run, and all library cards. Full Access is a one-time in-app purchase that unlocks all content without a subscription.

### On which devices can I use Power Grid Operator Exam Prep?

Power Grid Operator Exam Prep is available on Mac, iPhone, and iPad, allowing you to study across multiple Apple devices.

### How often is Power Grid Operator Exam Prep updated?

The app was last updated on October 4, 2026, indicating a commitment to maintaining and improving the training content. The latest version is 1.4.

### What is the user sentiment for Power Grid Operator Exam Prep?

Based on the provided data, the app has a perfect rating of 5.0 stars from 2 ratings, suggesting a very positive user experience among its current users.

## Version history (last 5 releases)

### 1.4 — 2026-10-04

New: your progress follows you across iPhone, iPad and Mac.

• Answers, your review schedule, mock papers and simulator runs come together on every device signed in to your iCloud account. Nothing to set up: the switch is in Library › Sync.
• It runs on your own iCloud. There is no account, and the developer cannot see your progress.
• Each device keeps its own copy, so studying offline works as before and catches up when you are back online.
• With sync on, "Reset all progress" clears every device.
• The free questions, free mock paper and free simulator run are shared by your synced devices.

### 1.3 — 2026-10-02

New: the Control-Room Simulator, on the Practice tab.

• Take a simulated shift at the BA, TOP or RC desk in nine scenarios: the largest unit trips at the evening peak; ACE beyond BAAL; a line trip loads the parallel path; an IROL exceedance against its Tv; short of capacity, EEA 1 to EEA 3; the EMS goes dark; interchange requests against the clock; voice paths down; and evacuating the control room.
• One model runs the system, and the clock stops at each decision. Read the live displays, choose what to do or answer a three-part communication (confirm, reissue or take another action), then watch your choice play out.
• Every shift ends in a debrief, in counts rather than percentages: which obligations you met or missed against the standards' own clocks and with how much time to spare, every decision explained, and your shift charted against the reference play on the same draw.
• Every number on screen is tagged: a NERC figure with its requirement, a value your company or RC sets, or an assumption of the model.
• New numbers every run. Try one run of any scenario free; Full Access opens all nine on all four credentials. If you already have Full Access, the simulator is included.
• Keyboard: A–D, 1–4 and Return for decisions; C, I and X for three-part communication.

Also in this version:
• One wrong answer on a knowledge area you had not tried could raise your readiness estimate. It no longer does.
• Questions left blank on a mock paper no longer go into your study record. The paper's own score still counts them as wrong.
• The session verdict and the Home readiness chip are judged on exact counts against the cut score, without rounding.
• A post-contingency margin question that named two different circuits now names one.

### 1.2 — 2026-09-28

• Full Access: Grid Prep is now free to try, with 50 practice questions, a full mock paper on any credential and the whole Library. A single one-time purchase unlocks everything else, with no subscription, on iPhone, iPad and Mac.
• Already using Grid Prep? Nothing changes for you. Everyone who downloaded it before this update keeps full access for free.
• Confirm your answer: tap an option to choose it, change your mind if you like, then Confirm answer to see the explanation. A–D, 1–4 and Return work on a keyboard.
• The one-line's contingency analysis is now solved on a power-flow model and judged against Emergency Ratings, as FAC-011-4 sets out, with the distribution factor printed for every outage.
• The one-line and AGC control board now size themselves to fit the sheet on iPad and Mac, and open from the review after a mock paper.
• Clearer VoiceOver labels throughout, and smaller fixes.

### 1.1 — 2026-09-24

New name, same trainer: System Operator Prep is now Power Grid Operator Exam Prep, shown as Grid Prep on your Home Screen, so candidates searching for the NERC exams can find it.

• Now on Mac, as a native app.
• Runs on iOS 26 and iPadOS 26 as well as 27.
• On iPad, the generated one-line and AGC control board open as a full page, so the whole contingency analysis report fits on one sheet.
• Available in more countries and regions.

### 1.0 — 2026-09-23

No release notes.

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All apps by PATRICK ANTHONY RODRIGUES: https://appshunter.io/developer/6806796087

## Related topics

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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 2026-10-11.*