EZ Sextant

EZ Sextant

By Third Reef Software

EZ Sextant is a celestial navigation tool that enables users to determine their position in open waters without GPS. By utilizing the device's camera to sight celestial bodies like the sun, moon, and planets, the app generates lines of position and running fixes on a lat/lon grid. It serves as both a learning aid for traditional sextant use and a redundant navigation backup for mariners.

Overview · Full Intel report in progress

The App DNA

What makes this app unique?

For Professional mariners, passage makers, and sailing enthusiasts interested in celestial navigation.

What does it look like?

Key features

Celestial Sightingsstandard

Uses the device camera to capture sightings of the sun, moon, Venus, or Mars.

Plotting Toolsstandard

Calculates lines of position and combines multiple sightings into a running fix.

Built-in Almanacstandard

Provides integrated data to support celestial calculations without external references.

Position Displaystandard

Visualizes estimated coordinates on a lat/lon grid.

How much does it cost?

paid

Velocity

Active developmentShow more...

5 versions in history. Development pace: active.

See all version history

Who built it?

Third Reef Software

1 app tracked · Navigation

Explore the full publisher profile

User Sentiment

What do users think recently?

How are ratings & reviews evolving?

App Store
5.00 · 4

Not enough recent reviews to extract reliable themes yet.

Read the full review analysis

Competition

Competitive landscape for EZ Sextant

How's the Navigation market?

The rivals identified

The Analyst's Read

Key takeaways for EZ Sextant

Where is it heading?

Bottom line

This app provides a digital, high-accuracy alternative to traditional manual celestial navigation methods for maritime redundancy.

Report last updated

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by EZ Sextant, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Cite this report

Marlvel.ai. “EZ Sextant Intelligence Report.” Updated May 5, 2026. https://marlvel.ai/apps/thirdreefsw-ezsextant

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