Instrument Rating · INRAT · Aeroplane · Canada
INRAT Prep
The INRAT asks you to read things: en-route charts, approach plates, area forecasts, weather maps, the flight plan of a simulated IFR flight. INRAT Prep draws a new fictional one of each, every run, and asks the questions on it. Try it free on iPhone, iPad or Mac.
Get INRAT Prep on the App Store →
Six chart readers
Each run draws a chart nobody has seen before and asks ten questions on it, each answer explained with its reference. Pinch or drag to zoom and pan, and open the legend when a symbol is unfamiliar.
- En-route Chart Reader (Low): MEA, MOCA and AMA, tracks and distances, airspace, frequencies and the cruising altitude for your direction.
- En-route Chart Reader (High): flight levels with and without RVSM, Q-routes, FIR boundaries, sector frequencies and high-level holds.
- Approach Plate Reader: plan and profile, MSA, feeder and segment altitudes, straight-in and circling minima, the approach ban, the missed approach.
- Reference Table Reader: the TC AIM's alternate minima, cold-temperature correction, holding speed and aircraft category tables, typeset anew. The same tables sit free in the Library.
- GFA Reader: a whole graphic area forecast issue, three times of two panels each: clouds and weather, icing, turbulence, the freezing level, heights above sea level or ground, the outlook.
- Weather Map Reader: a surface analysis, an upper-level chart and a significant weather prog: fronts, highs and lows, winds, the freezing level.
Every chart, plate and aerodrome is invented and marked fictional. They teach how to read the real products; they are not for navigation.
The flight package
The real paper works a group of questions off one simulated IFR flight. Every INRAT Prep mock exam does too: one fictional trip with a destination and an alternate, and an appendix of six documents that agree with each other — the flight plan and log, a weather folder of METARs, TAFs and FB winds, the en-route chart with your route drawn on it, a GFA over the same ground, the destination's RNAV (GNSS) approach plate and the reference tables. Six questions are worked from them. The Flight Package tile in Practice runs one on its own.
Simulator trainers
The Holding Trainer draws the fix, racetrack and aircraft top-down and asks the entry, the outbound heading, wind correction, timing, speed limits and DME turns; after an entry answer it adds the 70-degree line and the path to fly. The Navaid Trainer sets a VOR indicator, an HSI, a fixed-card ADF or an RMI for quadrant, intercept and bearing questions, then plots a position that fits. The Approach Plate Trainer builds a text plate for an invented aerodrome and asks minima for your category, DA or MDA, the approach ban and the alternate minima it supports. All three are written-exam practice, not a flight simulator or flight training.
The paper, timed
50 questions in 3 hours, 70% to pass: 40 drawn from across the syllabus, the 6 flight-package questions and 4 calculations. Flag questions, move with the question map and see nothing until you submit; results break down by area, with every question open for review.
Plan to an exam date
Enter the day you write and Home counts down, setting today's question target from what you have not yet learned. It says Ahead of plan, On track or Catching up, recalculates as you study and can remind you once a day at a time you pick. No streaks.
Questions, cards and drills
682 questions in 60 topics across ten areas, from regulations and airspace to human factors and airmanship; every one is explained and cites its source, usually a CAR or the TC AIM. Missed ones return on a spaced schedule. A weather folder trainer and calculation drills show their working, and each topic has a card of must-know figures. Spot an error? Report a problem under any explanation drafts an email for you to check and send.
On all your devices
With iCloud Sync on (the switch is in the Library), your answers, mock exam history and exam date follow you between iPhone, iPad and Mac. Apple keeps that copy under your Apple Account, and the developer never receives it.
What is free
50 practice answers, 2 complete mock exams with their flight package, one Holding Trainer run, one chart run and every study card. Pay once for Full Access (no subscription) and every limit lifts, whichever device you bought it on. The purchase belongs to your Apple Account, so Restore brings it back on another device.
Nothing to sign up for, no advertising, nothing sent to the developer, and studying needs no connection.