# NaviStar

> Celestial navigation calculator for determining true position. (iPhone/iPad app by David Ventura soler.)

- Source: https://appshunter.io/ios/app/navistar/id1387942793 (this page in markdown: same URL + `.md`)
- Developer: [David Ventura soler](https://appshunter.io/developer/1387942792)
- Category: Navigation, Utilities
- Price: $4.99
- Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 3 MB
- Languages: English, Spanish
- Released: 2018-08-31
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/navistar/id1387942793/reviews.md

## What is NaviStar?

The NaviStar App allows you to perform astronomical navigation calculations in a few easy steps. Enter the required observation data and NaviStar will calculate your truth position. The results obtained are shown in a PDF document.

The NaviStar App could be a very useful tool for seafarers. Note that in case of “Black Out” or GPS offline, celestial Navigation would be their only possibility to safely proceed to port. NaviStar App would help seafarers providing the calculation of its truth position and reducing the time to do so. Also, the print option of NaviStar results would provide evidence of their observations to authority surveyors.

Available algorithms:
-Simultaneous observation  (*)
-Almost simultaneous observation  (*)
-Non simultaneous observation  (*)
-Meridian observation
-Latitude by pole star
-Star recognition
-Total correction by Pole Star

(*)Graphical representation results on plotting chart.

## Key features

- Astronomical navigation calculations
- True position calculation
- PDF result export
- Simultaneous observation algorithms
- Meridian observation
- Latitude by pole star
- Star recognition

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/navistar/id1387942793/reviews.md

### 1/5 — Needs basic layout updated

*2019-01-07, version 1.2*

I’m asked for time during a sight, but the inputs are set for degrees. Slick interface, but developer needs to use it in the real world.

**Developer response:** The concepts that you are referring to, are the Greenwich Hour Angle (GHA), the Local Hour Angle (LHA) and Sidereal Hour Angle (SHA). These angles have to be measured in degrees. Understanding that the (hh) and (hh + 1) angles are referred to the previous and subsequent values at the UTC of each observation.

NaviStar has been presented at the IAMU 2018 congress and has been tested by captains in real exercises. NaviStar would help seafarers providing the calculation of its truth position and reducing the time to do so (not more than three minutes). Also, the print option of NaviStar results would provide evidence of their observations to authority surveyors.

Note that in case of “Black Out” or GPS offline, celestial Navigation would be their only possibility to safely proceed to port, in such cases, I think that you would like to have a tool that could help you to calculate your truth position. 

For any other observation I remain at your disposal at info@irukandji.co

## Frequently asked questions about NaviStar

### What is NaviStar used for?

NaviStar is used to perform astronomical navigation calculations to determine your true position. It's particularly helpful for seafarers when GPS is unavailable.

### How does NaviStar present its results?

NaviStar presents the results of your calculations in a PDF document. Some results also include a graphical representation on a plotting chart.

### What observation methods does NaviStar support?

NaviStar supports several observation methods including simultaneous, almost simultaneous, non-simultaneous, and meridian observations. It also offers latitude by pole star and star recognition.

### Is NaviStar suitable for emergency situations?

Yes, NaviStar is designed to be a useful tool for seafarers, especially in 'Black Out' or GPS offline scenarios where celestial navigation is the only possibility to proceed safely.

### What devices is NaviStar compatible with?

NaviStar is available for iPhone, iPad, and iPod devices. It was last updated on September 29, 2021, with version 1.7.

### What is the price of NaviStar?

NaviStar is a paid application, priced at $4.99. There are no in-app purchases mentioned.

### What is the age rating for NaviStar?

NaviStar has an age rating of 4+, making it suitable for a wide range of users. The app was first released on August 31, 2018.

### How often is NaviStar updated?

The latest version of NaviStar, 1.7, was released on September 29, 2021. While specific update frequency isn't detailed, this indicates it receives periodic maintenance.

## Version history (last 5 releases)

### 1.7 — 2021-09-29

This update fixes a bug in multitasking full screen mode on the new iPad mini.

### 1.6 — 2021-04-03

This update includes the "observation date" field and a more detailed results document.

### 1.5 — 2021-03-28

App design and layout fixes and improvements have been made.
The functionality of text fields has been improved.
Document design improvements have been made.

### 1.4 — 2020-06-18

This update includes a renovated layout adapted to iOS 13 that includes "dark mode", very useful for twilight observations.
"Total Correction algorithm" by observation of the Pole Star azimuth has been added.
The system checks that the data entered in the text fields is correct.
The positioning report has been updated to pdf format.
The "Share" functionality has been added for the positioning report.

### 1.3 — 2019-01-30

This version includes the next features:
-A more detailed design for the representation of the plotting chart.

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## More apps by David Ventura soler

- [Binnacle Calibrator](https://appshunter.io/ios/app/binnacle-calibrator/id1455023329)
- [Anchoring Watch](https://appshunter.io/ios/app/anchoring-watch/id1455023964)
- [Magnetic Deviation](https://appshunter.io/ios/app/magnetic-deviation/id1458223717)

All apps by David Ventura soler: https://appshunter.io/developer/1387942792

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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 2026-06-10.*