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 341–360 of 1,000 ranked alternatives.

  1. Madrid Travel Guide & AI app icon

    Madrid Travel Guide & AI

    TicketLens GmbH

    Plan trips, compare tours, build itineraries

    Plan trips by asking questions and receiving step-by-step guidance. Explore attractions like royal palaces and stadiums. Compare and book tickets and tours directly. Save favorite locations and activities to create a personalized itinerary.

    ★ 4.843 ratingsTravelFreeData updated 2026-09-08
  2. NAUTICAL CHART SYMBOLS & ABBREVIATIONS app icon

    NAUTICAL CHART SYMBOLS & ABBREVIATIONS

    The Other Hat

    Symbols for nautical charts reference

    The app provides reference to symbols used on nautical charts specified by the International Hydrographic Organization. It includes international abbreviations and supplementary national symbols used by the U.S.

    ★ 3.52 ratingsNavigation$1.99Data updated 2026-10-18
  3. Aero App app icon

    Aero App

    National Geospatial-Intelligence Agency

    Navigate flights with real-time data

    Access aeronautical data and flight publications for navigation. View Digital Aeronautical Flight Information File (DAFIF) and flight charts. Retrieve weather information and navigation aids. Manage flight plans and check aircraft status.

    ★ 3.340 ratingsNavigationFreeData updated 2026-09-12
  4. Sun Metro app icon

    Sun Metro

    City of El Paso

    Plan trips with real-time bus info

    Plan trips using current location, landmarks, stop numbers, or addresses. Set departure or arrival times and preferences for shortest walking distance or fewest transfers. Find nearby bus stops with GPS. View real-time bus schedules.

    ★ 2.031 ratingsTravelFreeData updated 2026-09-12
  5. Sunset Rides app icon

    Sunset Rides

    Magnushub Ltd

    Rent electric scooters and explore

    Rent electric scooters to explore Southwest Florida. Locate and unlock scooters in real-time. Pay for rentals and track usage. View maps with scooter availability. Receive notifications about scooter status and location.

    ★ 4.745 ratingsTravelFreeData updated 2026-09-06
  6. GPS Field Area Measurement app icon

    GPS Field Area Measurement

    Stephen Kuyper

    Measure land , distance, and perimeter

    Measure land , distance, and perimeter using real-time GPS. Mark points on a map to calculate fields, plots, and paths. Switch between and distance modes. Supports units like acres, hectares, and square feet. Save and export data.

    ★ 4.134 ratingsProductivityFreeData updated 2026-09-06
  7. Marine Navigation-USA Lake Map app icon

    Marine Navigation-USA Lake Map

    Bist LLC

    Navigate with voice prompts and route manager

    Access vector charts, freshwater maps, and USACE river maps. Create or import routes using GPX/KML. Receive voice prompts for navigation. View tide and current predictions. Rotate charts with text remaining upright.

    ★ 4.221 ratingsNavigation$29.99Data updated 2026-10-21

How we rank alternatives

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