# Helmwright Nautical Calculator

> Speed, time, distance, course to steer, compass, horizon and tides. Offline.

Canonical page: [https://chrome-stats.com/d/app.wrightcalc.helmwright](https://chrome-stats.com/d/app.wrightcalc.helmwright)

## Overview

- **ID:** `app.wrightcalc.helmwright`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** OID4Pay B.V.
- **Category:** TOOLS
- **Version:** 0.1.6
- **Last updated:** 2026-10-29
- **First published:** 2026-10-10
- **Publisher country:** NL
- **Size:** 20 MB
- **Data as of:** 2026-11-09
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=app.wrightcalc.helmwright)
- **Website:** [https://wrightcalc.app/helmwright/](https://wrightcalc.app/helmwright/)
- **Privacy policy:** [https://wrightcalc.app/helmwright/privacy/](https://wrightcalc.app/helmwright/privacy/)

## Description

Helmwright is a navigation calculator for sailors, skippers, delivery crews and navigation students. It works like a hardware calculator: a sea-green chassis, real keys and a clear LCD, with each answer labelled so you know what you are reading.<br><br>SPEED, TIME AND DISTANCE<br>• Any two of speed, time and distance give the third, in knots and nautical miles<br>• ETA from a departure time<br>• Hull speed and speed-length ratio from waterline length<br><br>CURRENT<br>• Course to steer and speed made good against a known set and drift<br>• Course and speed made good from course, speed and current<br>• Set and drift from your dead-reckoning position and a fix<br><br>COMPASS<br>• True to compass and back: variation and deviation, east or west<br><br>HORIZON AND LIGHTS<br>• Distance to the horizon from height of eye<br>• Geographic range of a light<br>• Distance off by vertical sextant angle<br><br>TIDES AND FUEL<br>• Height of tide by the rule of twelfths, for any range and duration<br>• Endurance, range and fuel for a trip from burn rate<br><br>WORKS THE WAY YOU DO<br>• Feet or metres for heights, gallons or litres for fuel<br>• A results strip shows every solved value at once<br>• 10 memories, a tape of your calculations, reference tables and a key guide<br>• Export a job strip: the tape with inputs, stamped and ready to attach to a passage plan or logbook, as text or PDF<br><br>TRY PRO FREE FOR 7 DAYS<br>Try every feature free for 7 days, then keep Pro with a yearly subscription. Cancel anytime in Google Play. No ads, works offline.<br><br>PRIVATE BY DESIGN<br>Works offline, no account, no data collected.<br><br>How it&#39;s calculated: the formulas and tables behind every result, at https://wrightcalc.app/helmwright/<br><br>Questions or feedback: support@wrightcalc.app<br><br>For passage planning and training. Not a substitute for official charts, tide tables, notices to mariners or proper watchkeeping. Verify every result. The developer accepts no liability for loss or damage arising from use.

## Rankings

- #3,384,262 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.INTERNET`
- `app.wrightcalc.helmwright.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`
- `com.android.vending.BILLING`
- `com.android.vending.CHECK_LICENSE`

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