EZ Celestial Navigation
An offline celestial-navigation calculation and study tool with almanac tables, sight-reduction steps and observation reports.
Consider primarily for trained users reviewing calculations
Displayed intermediate values and printable tables can help relate automated work to a manual learning method.
Keep in mind: This capture does not validate navigation accuracy. Release notes and description name different magnetic-model editions, so the active model and date range must be checked before consequential use.
Inside the app
Official product images
What you can do
- Browse generated almanac and reduction tables
- Record and archive observations
- Inspect plotted lines of position and calculation steps
- Print supported observation or compass-check reports
Good for
- Navigation students and trained mariners who can independently cross-check results and maintain approved backups.
Consider alternatives for
- People expecting automatic position safety, a sextant included or a substitute for qualified navigation practice.
Limitations & considerations
- Captured minimum: iOS 13.0.
- This capture does not validate navigation accuracy. Release notes and description name different magnetic-model editions, so the active model and date range must be checked before consequential use.
Privacy & permissions
Saved observations and positions can reveal journeys. Offline calculations do not establish every storage or collection practice.
Sources & review notes Updated Nov 11, 2026
Reviewed by iApp4Me Editorial Team. Recommendations use the linked documentation and attributed accounts; device observations are identified separately.
- US App Store developer description
Complete description, download price and compatibility metadata captured 2026-11-02.
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