# E6B Aviation Calculator - FLT9

> Flight Computer and EFB

Canonical page: [https://chrome-stats.com/d/id6475892430](https://chrome-stats.com/d/id6475892430)

## Overview

- **ID:** `id6475892430`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Raj Jeshang
- **Category:** Utilities
- **Rating:** 4.40 / 5 (38 ratings)
- **Version:** 2.3.1
- **Last updated:** 2026-01-28
- **First published:** 2024-01-24
- **Size:** 10 MB
- **Data as of:** 2026-09-19
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/e6b-aviation-calculator-flt9/id6475892430)
- **Privacy policy:** [https://rajjeshang.github.io/E6B/](https://rajjeshang.github.io/E6B/)

## Description

Try it for free - upgrade to unlock all flight calculators. You get full access to all 47 aviation functions:

E6B

- Pressure and density altitudes
- True Airspeed, calibrated airspeed, and mach number
- Wind correction angle
- True heading and compass heading
- Crosswind, headwind, and tailwind
- Ground speed and flight time
- Fuel burn
- Cloud base, cloud temperature, and freezing point / altitude

Ascent and descent planner

Calculate:

- Required climb and descent rate in feet / nm
- Required vertical speed in feet / minutes
- Slope and gradient
- Distance to top of climb / from top of descent
- Time to climb or descend

Fuel Calculator

- Convert between imperial and metric units of volume and weight for Avgas and Jet-A:
  	Gallons ↔ Liters ↔ Pounds ↔ Kilograms

- Calculate the total endurance given the useable fuel and fuel burn rate.
- Calculate total fuel burnt for flight-time

Weight & Balance

- Quickly and accurately calculate aircraft's CG at ramp, takeoff, landing, and zero-fuel situation

Holding Pattern

- Visualize entry patterns and calculate wind correction to maintain holding pattern

Interpolate

- Interpolate up to three columns of performance data tables

Convert

-14 conversions between imperial and metric units:

- Feet ↔ Meters
- Inches of mercury ↔ Millibars
- Nautical miles ↔ Statute miles ↔ Kilometers
- Fahrenheit ↔ Celsius ↔ Kelvins
- Gallons ↔ Liters
- Pounds ↔ Kilograms

Time Calculator

- Add (or subtract) time in HH:MM:SS formats.
- Convert time between HH:MM:SS and decimal hours, minutes, and seconds.

Change default units for international users

- Altitude in feet or meters
- Barometric pressure in inches of mercury (inHG) or millibars / hectopascals (mb / hPa)
- Distances in nautical miles, statute miles, and kilometers
- Speed in knots, miles per hour, and kilometers per hour
- Temperature in Fahrenheit and celsius 
- Volume in US gallons and liters
- Weight in pounds and kilograms
- Center of gravity / arm in inches and meters

Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Rankings

- #197,564 — Overall

## Review summary

The app is notably easy to use with a clean, single-page interface that shows all calculations, updates results in real time, and displays both local and Zulu times—making preflight planning fast and efficient. The main drawback mentioned across multiple reviews is the pricing model, which users feel is deceptive since the app isn’t actually free.

### Pros

- Very user-friendly / easy to use
- All calculations on a single page
- Real-time / instant results as data is entered
- Local and Zulu times shown at the top
- Strong preflight planning/nav log capabilities and speed

### Cons

- Pricing concerns: marketed as free but requires payment (subscription or one-time purchase), seen as deceptive

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6475892430)