Marine

Weather on board — with your own API key (BYOK)

Wind, waves and conditions for the leg — live data only if you want. Keys in the iOS keychain, not with us.

Weather apps often want subscriptions

Many weather services tie you to maps and accounts. Sailors need clear parameters for area and watch — without NauticCalc becoming a second subscription.

BYOK — your key, your account

·Stormglass and OpenWeather optional
·API keys stored securely in the iOS keychain
·No NauticCalc subscription for live weather
·Combined with ETA and passage planning
·Offline core calculators stay independent

Offline vs. live

Course, variation, ETA and conversions run offline. Weather is deliberately live — only with your own key.

Keys stay on the device

We do not forward your API keys through our servers.

Frequently asked questions

For live weather yes — free tiers at providers are often enough. All core calculators work without a key.

Stormglass (marine) or OpenWeather — enter the key once.

Weather for the leg

BYOK optional