# Sight Calc vs Celestial Navigator

The clearest difference is price: Celestial Navigator at Free against Sight Calc's $1.99. Celestial Navigator also leads on iOS requirement (11.0 vs 16.0). Sight Calc's advantage is rating (5.0 vs 2.0) and review sentiment (82% vs 43%). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Celestial Navigator is free to download; Sight Calc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sight Calc holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 7 and 3 respectively. Written reviews point the same way: 82% of Sight Calc's written reviews are positive against 43% of Celestial Navigator's.

Sight Calc ships an update every 11 months, Celestial Navigator every 9 months. The most recent releases landed on September 10, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | Sight Calc | Celestial Navigator |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/sight-calc/id497809138/reviews)** | [2.0 (3 ratings)](https://appshunter.io/ios/app/celestial-navigator/id696927722/reviews) |
| Number of ratings | **7** | 3 |
| Positive reviews | **82.4% of reviews** | 42.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 9 months** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 32 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [NUVOCOM INCORPORATED](https://appshunter.io/developer/497809141) | [Omar reis](https://appshunter.io/developer/687921629) |

## What reviewers say

### Sight Calc

[App page](https://appshunter.io/ios/app/sight-calc/id497809138)

This app is a specialized calculator for sight reductions using the Law of Cosines method. It's designed for students learning celestial navigation and requires manual input of LHA, declination, and approximate latitude.

**Highlights:** Law of Cosines sight reduction, Manual LHA, declination, and latitude input, Input as degrees/minutes or decimal degrees, Continuous computation of Hc, Z, and Zn, Supports North/South latitude and declination conventions, Clear and clear entry functions, Convert minutes to decimal degrees

**Features:** macOS Compatibility

**In-app purchases:** none


### Celestial Navigator

[App page](https://appshunter.io/ios/app/celestial-navigator/id696927722)

This app assists with celestial navigation training by providing a perpetual almanac, star finder chart with animation, and tools for calculating lines of position and meridian passages. It can utilize device sensors for real-time chart positioning, though a marine sextant is still required for actual navigation.

**Highlights:** Perpetual almanac, Animated star finder chart, Line of position calculation, Meridian passage calculation, Real-time sensor integration, Celestial object data

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sight Calc free?

Sight Calc costs $1.99, with no in-app purchases.

### Is Celestial Navigator free?

Celestial Navigator is free to download, with no in-app purchases.

### Which has better reviews, Sight Calc or Celestial Navigator?

Sight Calc is rated higher. Sight Calc averages 5.0 out of 5 from 7 ratings, while Celestial Navigator averages 2.0 from 3 ratings.

### Do Sight Calc or Celestial Navigator have ads?

Neither Sight Calc nor Celestial Navigator shows ads.

### Which is updated more often, Sight Calc or Celestial Navigator?

Sight Calc ships an update every 11 months, and Celestial Navigator every 9 months. Most recently, Sight Calc was updated on September 10, 2026 and Celestial Navigator on August 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*