# StarPilot

> Advanced celestial navigation computations and plotting for maritime use. (iPhone/iPad app by Starpath Corp.)

- Source: https://appshunter.io/ios/app/starpilot/id359071446 (this page in markdown: same URL + `.md`)
- Developer: [Starpath Corp](https://appshunter.io/developer/1345556660)
- Category: Navigation, Reference
- Price: $49.99
- Rating: 4.90/5 from 8 App Store ratings · 20 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 4 MB
- Languages: American English
- Released: 2010-03-03
- Data updated: 2026-09-06
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/starpilot/id359071446/reviews.md

## What is StarPilot?

The state-of-the-art solution to navigation computations on your iPhone or iPod touch.

StarPilot does celestial sight reductions of all bodies using high-precision internal almanac, plus mathematical and graphic solutions for position fixes, great circle, rhumb line, traverse and composite sailings, all current problems, piloting solutions, and much more...including lunar distance method of finding GMT from the sky and a unique graphical Sight Planner, and the new Sight Analyzer function that helps you get the most accurate results from a series of sights. 

The StarPilot is the self sufficient state of the art solution to ocean navigation, fully up-gradeable with free upgrades available via Internet download, easy to use operation from logical menu lists, plus illustrated context sensitive help with practice exercises.  The StarPilot requires no external resources to complete its computations.  Internet access is not required to use this program or to access any of its help files.

General program design features... that save time, keystrokes, and minimize errors 
- Easy to use menu-driven interface
- Stored settings of commonly used values
- All bodies and star names stored internally, no need for separate lists
- DR functions integrated with the celestial functions
- Convenient DR updating by log or time
- Input courses as true or magnetic
- Convenient time input, with or without zone description and watch error
- Graphing calculator plots LOPS, Fixes, DR positions, and Star maps
- Program can be easily updated to incorporate latest version and features
- Custom menu bar for quick navigation to often-used functions

Sight Planning
- Sunrise, Sunset, times and bearings (amplitudes)
- LAN, time, Equation of time, Hs max at LAN1
- Nautical and Civil twilight times, and LHA Aries at midpoint between them
- Moonrise, Moonset, Moon phase, and Moon age
- Precompute specific values of Hc and Zn for any body
- Planet and Star ID by observed height and bearing
- SIGHT PLANNER function plots full sky showing moon, stars, and planets in Radar-like display of heights and bearings. Set Hc min/max and max number of stars before computation. Set cursor and click to read the actual height and bearing of a plotted body.
- Special fast almanac mode allows full sky plot 
- Display internal list of 173 stars by name, brightness, and location
- Unique BEST SIGHTS function selects the optimum triads of sights for any sky

Sight Reduction
- Optional modes for sequential sights using repeated settings or unrelated individual sights
- Perpetual almanac accurate to 2100+
- Historically accurate almanac data to 16th century
- Sight reduction of Sun, Moon, Mars, Venus, Jupiter, Saturn... plus Mercury!
- Sight Reduction of 173 stars plus Polaris
- “Assumed positions” read directly from DR section without extra input
- View intercepts (a-values) with or without course and speed corrections
- Full input data displayed with results to check for errors
- Special center-body mode for artificial horizon data
- Dip-short mode for practice at shorelines

Celestial Fixes
- Unique SIGHT ANALYZER fits a sequence of sights to the right slope for optimum sight selection
- All fixes corrected automatically for course and speed as needed
- Fix accuracy independent of DR accuracy in all cases
- Plots LOPS with live cursor position display
- Fix computed by USNO algorithm in the Nautical Almanac
- Zoom in on plot to see where computed fix is located
- Fix can be obtained by graphic selection from the LOP plot
- Automatic display of DR-to-Fix range and bearing
- Optional automatic update of DR after fix
- Display new course and distance to stored destination

## Key features

- Celestial sight reductions
- Position fixes and great circle sailing
- Lunar distance method for GMT
- Graphical Sight Planner
- Sight Analyzer function
- Menu-driven interface
- Perpetual almanac

## Recent user reviews (10 of 20)

All indexed reviews: https://appshunter.io/ios/app/starpilot/id359071446/reviews.md

### 5/5 — iCloud Syncing

*2023-10-27*

Overall great tool. Would be great if you could sync the Sight Archive to the cloud so that sights entered on iPhone could be accessed from iPad or vice versa.

### 5/5 — Best in class

*2018-01-25*

As a professional US navy navigator I've used this app daily for at least 7 years. First on a TI89 calculator, then on iPhones starting with a 4s when that was new. Now on a 7 Plus. 
Makes my work easier and would be lost without it. The U/I may not be as polished as an app from Apple but it certainly does the job. 
Have never had a single crash or malfunction. Paid once for the app years ago and have benefited from regular updates. 
It is the only Nav app I recommend to other officers and cadets.

### 4/5 — Sugerencia

*2015-06-22, version 2.04*

Podría estar disponible en español.

### 1/5 — WORTHLESS

*2014-09-11*

It constantly closes itself, wiping out all readings. When I reopen the app, everything is back to zero. All entered shots gone. My DR position gone. My course gone. My speed gone. I go through the whole process again, make it plot, and BOOM, back to my home screen, and it’s all gone again. Repeat. Repeat. Repeat. For some ridiculous reason, I kept at it and it finally plotted my position on the fifth attempt, for only for a minute, then BOOM, all gone. Tried again, and it wouldn’t plot. Absolutely worthless! I’ll be pursuing a refund.

### 1/5 — Many Glitches Poor Support

*2014-04-24*

The problem here is that when you run into a software glitch, GMN will not only blow you off, but will absolutely refuse to even admit the most obvious and easily fixable problems. It very much seems that the software writer is tired of maintaining the product and is unwilling to address any new or old problems.

As you can see, the one star bar is rapidly catching up with the five star bar and will very soon pass it by.

If you can tolerate the small problems, the program is still fun. However don't even dream of staking your safety on this tool. Bring your sight reduction tables with you.

Ron DiGiovanni
Easton, PA

### 5/5 — Only navigation app you need

*2013-08-20, version 1.20*

With this app and a sextant you can go anywhere.  Learning how to use it takes some time but there are helpfull utube videos. Even if you flunked your astro course you can become an ace navigator with this app.

### 4/5 — Bueno, segun el Ronald

*2013-06-03, version 1.20*

Lo vamos a probar.

### 5/5 — Awesone

*2013-01-04, version 1.20*

Very usefull!!

### 3/5 — Good app with room for improvement

*2012-12-04*

After making the decision to purchase this rather expensive application I appreciate many of its abilities, True Wind, Sunrise/Sunset, Body ID, etc. but  it doesn't have an apparently easy Azimuth/Amplitude function which is one of my most frequent practices in celestial navigation. If this is added in a later version I will amend this comment. 

One bug for iPhone 5 are the buttons at the bottom don't work. Tried removing the app from recent app memory and then rebooting. Did not help. Hopefully next update corrects the issue.

### 5/5 — Just AMAZING!!

*2012-07-06*

This is the app that I've recommend for all mariners! No more manual methods!! Just easy way... Thanks.!!

## Frequently asked questions about StarPilot

### What is StarPilot?

StarPilot is a state-of-the-art navigation computation app for iPhone and iPod touch. It offers advanced features for celestial sight reductions, position fixes, and planning, requiring no external resources.

### How accurate is StarPilot's almanac data?

StarPilot features a perpetual almanac accurate to 2100+, with historically accurate data available back to the 16th century. This ensures reliable computations for a wide range of historical and future dates.

### Can StarPilot be used offline?

Yes, StarPilot does not require internet access to use its program or access any of its help files. All computations and data are stored internally, making it fully self-sufficient for offline use.

### What devices does StarPilot support?

StarPilot is supported on iPhone, iPad, and iPod touch devices. It is designed to provide advanced navigation solutions across Apple's mobile platform.

### How often is StarPilot updated?

The latest version is 3.0.7, last updated on March 16, 2025. The app is fully upgradeable with free upgrades available via internet download, ensuring you always have the latest features.

### What is the age rating for StarPilot?

StarPilot has an age rating of 4+, making it suitable for a wide range of users. This indicates it contains no mature content and is appropriate for younger audiences as well.

### Does StarPilot have ads?

No, StarPilot does not contain advertisements. As a paid application, it provides an uninterrupted user experience focused solely on navigation computations.

### What kind of navigation problems can StarPilot solve?

StarPilot can solve a wide array of navigation problems, including celestial sight reductions of all bodies, position fixes, great circle and rhumb line sailing, traverse and composite sailings, and piloting solutions.

## Version history (last 5 releases)

### 3.0.7 — 2025-03-16

We've fixed a mistake that caused the user-entered settings to fail to save.

### 3.0.6 — 2025-02-28

We've fixed a bug that got past us in the last build. Now the sight planner again shows you the names of the objects in the sky!

### 3.0.5 — 2025-02-23

We've updated the magnetic deviation model for 2025, and fixed some minor typos and bugs in the app.

### 3.0.4 — 2021-07-12

We've been busy fixing bugs and making the app better!

### 3.0.3 — 2021-03-13

We've found that in Dark mode the app does not display properly. While we are fixing this problem, we have this build which is always in Light mode.

## Apps similar to StarPilot

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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## More apps by Starpath Corp

- [Marine Barometer](https://appshunter.io/ios/app/marine-barometer/id1370744934)
- [Marine Barograph](https://appshunter.io/ios/app/marine-barograph/id1393761744)
- [WindCalc](https://appshunter.io/ios/app/windcalc/id6455129265)

All apps by Starpath Corp: https://appshunter.io/developer/1345556660

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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 2026-09-06.*