NESW

Comparison

Offline vs online — what skippers really need

Backup navigation on iPhone: calculations and logbook locally; chart apps and live data separately.

Download on the App Store
NauticCalc app screenshot

Two worlds

Online apps need signal. Offline calculators are useless for weather charts — chart apps useless for variation without network.

NauticCalc position

  • ·Offline: course, variation, ETA, logbook
  • ·Optional online: weather, tides worldwide (BYOK)
  • ·Not a replacement for charts and AIS

Related topics

Test offline

Download on the App Store