Rules of Thumb

Why Rules of Thumb

Built for the Cockpit

Real aviation mental methods. The way professional pilots actually calculate.

✈️

Real Aviation Formulas

Every calculation reflects actual cockpit mental methods — crosswind, TAS, descent planning, pressure altitude, ISA deviation.

🧠

Type Your Answer

Master mode requires typing your answer within tolerance — just like a real checkride. No multiple choice at the highest levels.

📈

Progress Tracking

Accuracy per game, per level, per session. See exactly where you struggle and when you're ready to advance.

⚡

Challenge Mode

Master Plus Challenge delivers questions via notifications over 10 hours — simulating real in-flight decision pressure.

🏆

30 Badges

Speed, streaks, accuracy, daily consistency, challenge completions. Earn bronze, silver, and gold banner status.

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Rule Book

Full formula reference always available. Every rule explained with examples — works offline, opens from any quiz screen.

Six Games

Every Formula You Need

Six aviation calculation categories covering the formulas student pilots use daily.

CONVERSIONS

Use conversions to switch between units like feet, meters, and nautical miles. Accurate conversions help ensure safe and efficient flights.

NM ↔ Km/h ↔ M/s
KG ↔ LBS · Fuel units
SM ↔ NM ↔ KM

CROSSWIND COMPONENT

Calculate the crosswind component during landing to determine how much wind is affecting the aircraft from the side. This helps them choose the correct landing technique and maintain safe control of the aircraft.

CW = WS × angle factor
0–15° → ×0.25
61°+ → ×1.0

DRIFT CORRECTION ANGLE

Applying the proper correction helps ensure accurate navigation and efficient flight.

SF = IAS ÷ 60
DCA = CW ÷ SF
Minimum 2°

TRUE AIRSPEED

Accurate true airspeed calculations improve flight planning, navigation, and fuel management.

TAS = IAS + (IAS × 2% × alt÷1000)
Always ≥ IAS

SPEED, DISTANCE & ALTITUDE

Accurate calculations help ensure proper navigation, fuel management, and compliance with flight procedures.

SF = GS ÷ 60
Distance = Time × SF
ROD = AltDiff ÷ Time

PRESSURE ALTITUDE

use pressure altitude to determine aircraft performance

PA = (1013−QNH)×30 + Elev
ISA = 15−(2×elev÷1000)
DA = PA+120×(OAT−ISA)

Four Levels

Your Path to Mastery

Progress at your own pace. All levels always available.

Learning

No timer. Formula hints shown. Unlimited questions. Perfect starting point.

Training

30 seconds. Multiple choice. Overtime extends with penalty. Builds speed.

Master

30s. Type your answer. Must be within ±15%. Tests real mental recall.

Master+

Master Plus

30s. ±8% tolerance. Random mix of all 6 games. Unlocks Challenge mode.

In Action

See the App

Replace placeholders with your actual screenshots — just swap the div for an img tag.

Home

Quiz in Action

Progress Tracking

Badges

Beta Testing

Join the Beta

Help shape the final version. Your feedback directly influences what ships.

Install TestFlight — Apple's free beta testing app, available on the App Store.

Tap the button below to send email for invitation

Start in Learning mode — play through all 6 game types to get a feel for the app.

Share feedback — what works, what's confusing, what's missing.

Send request

Focus Areas

What to Test

🎯

Formula Accuracy

Are the mental calculation rules correct for real flying? Report any formula that feels wrong or impractical.

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Timer Feel

Does 30 seconds feel right at each level? Too easy, too tight, or just right for each game type?

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UI & Navigation

Anything confusing, hard to tap, or missing? Any crashes or unexpected behaviour during sessions?

📊

Difficulty Curve

Does Learning → Training → Master feel natural? Where does it get frustrating or too easy?

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Badges & Progress

Do badge requirements feel fair and motivating? Is the progress screen useful and accurate?

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Missing Content

Any aviation calculations you use regularly that aren't covered? Anything that should be added or changed?

Rulesof Thumb