Perpetual Nautical Almanac app icon

Apps Like Perpetual Nautical Almanac for iPhone and iPad

Calculate celestial positions in real-time

Calculate precise celestial positions using real-time data from 1900 to 2050. Input date and time to instantly recalculate GHA and declination for the Sun and Aries.

by RPA TECHNOLOGIES SL★ 5.01 ratingsNavigation$6.99Data updated 2026-09-20

Perpetual Nautical Almanac screenshots

Ranked alternatives

Showing 181–200 of 1,000 ranked alternatives.

  1. Mars Info app icon

    Mars Info

    Viktor Goltvyanytsya

    Explore with gesture controls

    Explore by rotating, tilting, and zooming a 3D globe. Select locations to view topographic and gravity data. Pinpoint key features like volcanoes, craters, and spacecraft landing sites.

    ★ 4.3159 ratingsEducation$6.99Data updated 2026-09-10
  2. HUD Widgets app icon

    HUD Widgets

    HUDWAY LLC.

    Track speed, distance, and weather

    Display speedometer in digital or HUD mode with compass, odometer, and distance traveled. Show trip information including driving score based on acceleration. Track eco-driving metrics and weather data.

    ★ 3.5109 ratingsNavigationFreeData updated 2026-09-10
  3. Star Map Tracker: Sky Journey app icon

    Star Map Tracker: Sky Journey

    Yuriy Kvasha

    Track stars and constellations in real time

    Track celestial objects with augmented reality. Identify stars, constellations, nebulae, galaxies, and solar system bodies. View right ascension, declination, azimuth, and elevation data.

    ★ 0.00 ratingsEducationFreeData updated 2026-09-12
  1. ParkUsher: Find Parking Easily app icon

    ParkUsher: Find Parking Easily

    9493-0971 Quebec Inc

    Street instantly

    Legal street with real-time maps showing available spots. Scan signs to confirm legality. Avoid tickets by identifying restricted areas. Navigate to open spaces using location-based guidance. Receive alerts for nearby changes.

    ★ 4.6750 ratingsNavigationFreeData updated 2026-09-17
  2. Theodolite for Watch app icon

    Theodolite for Watch

    Craig Hunter

    Navigate with AR and map your path

    Measure direction and elevation with a digital compass and inclinometer. Access real-time GPS and map data. Navigate using location-based routes. Share coordinates and track movement history.

    ★ 4.220 ratingsNavigation$1.99Data updated 2026-10-23
  3. The Navigator app icon

    The Navigator

    The Nautical Institute

    Navigate with professional guidance

    Access previous editions of the publication. Read articles on topics like radar, ECDIS, positioning, and passage planning. Subscribe for updates. Contact The Nautical Institute for more information.

    ★ 4.02 ratingsNavigationFreeData updated 2026-09-09
  4. Ireland Tides: Times & Chart app icon

    Ireland Tides: Times & Chart

    Changrong Yao

    Offline tide times for Ireland.

    The app provides tide times for 74 Irish locations, functioning offline without a signal or data. It includes an interactive tide graph, location search, and selected.

    ★ 4.76 ratingsWeatherFreeData updated 2026-09-20
  5. Compass - Coordinates Locator app icon

    Compass - Coordinates Locator

    Rychard Matskevich

    Navigate with precision and explore trails efficiently

    Navigate with multiple styles, including analog and digital interfaces. Set and track waypoints, view elevation data, and receive turn-by-turn guidance. Sync with GPS devices and share route maps.

    ★ 4.1202 ratingsNavigationFreeData updated 2026-09-06
  6. Marinus: maritime rules app icon

    Marinus: maritime rules

    Alejandro Martinez de Carvajal

    Search navigation instantly anywhere

    COLREGs offers flag identification, weather scales, cloud recognition, sound signal guidance, and vessel light details. Users can access navigation , interpret flags, and understand sound and light signals for safe boating.

    ★ 4.4214 ratingsEducationFreeData updated 2026-09-08
  7. Dashometer app icon

    Dashometer

    Ian Ray

    Track trips, share routes, and monitor location

    Monitor location, heading, pressure, temperature, altitude, speed, distance, and elapsed time in real-time. Track trips, share routes, and receive comprehensive built-in instructions. Customize settings and view data on a large, easy-to-read display.

    ★ 4.818 ratingsNavigation$1.99Data updated 2026-09-08
  8. UK Tides: Tide Times & Chart app icon

    UK Tides: Tide Times & Chart

    Changrong Yao

    Offline tide times for UK locations.

    The app provides tide times for over 500 UK locations, functioning offline without a data connection. It includes tide graphs, location search, selected, and sunrise/sunset times.

    ★ 5.04 ratingsWeatherFreeData updated 2026-09-19

How we rank alternatives

Apps are ranked by functional similarity, category fit, rating confidence, and popularity.