Sirena Seafarer

Your personal navigation at sea.

Sirena Seafarer puts everything a skipper checks on one screen: where you are, where you are heading, who is around you and what the wind will do next. It keeps working when the signal goes, and it wakes you if the anchor drags. For iPhone, iPhone Duo and iPad, with a companion app for Apple Watch.

WHY SAILORS KEEP IT ABOARD
- Know where you are, always: live position, speed and course, even with no signal
- See who is around you: ships on AIS and your friends' boats on the same chart
- Sleep at anchor: an alarm the moment the boat leaves its circle
- Plan the day: routes, and wind and sea hour by hour
- Race sharper: a start clock synced to the committee, on your wrist
- Ready for the worst: your position, ready to read out on VHF

FREE, FOR EVERY SAILOR
- The Sirena Seafarer chart: the world's coastline, detailed about 40 km around your boat and saved for no signal
- Satellite Sirena: our own Sentinel-2 imagery of the coast, and the Play chart
- Live helm: SOG, COG, heading, position and GPS accuracy
- iPhone Duo: opened, a chartplotter with instruments, AIS and fleet
- Live AIS traffic: ships and small craft around you, with name, type and speed
- Wind and sea forecast, hour by hour
- Routes and waypoints, saved without limit
- Track log of every voyage, exportable as GPX
- Regatta: draw a course, share it with your fleet, and race to a 5-4-1-0 start clock synced to the committee
- Anchor watch with an alarm loud enough to wake you, even when the app is closed
- Distress assist: your position, ready to read out on VHF
- Fleet: your crew and friends live on your chart, invited by link or QR code
- Captain: achievements in Game Center, a days-on-the-water streak and seasonal challenges
- Live Activities, the Dynamic Island and Siri: "Start anchor watch", "Where am I"
- Apple Watch: helm, the regatta start clock with Sync, the anchor alarm on your wrist and your position for VHF

WORLD CHART OFFLINE
The whole world's Sirena Seafarer chart (about 1.1 GB) on your device, for sailing anywhere with no signal. A one-time purchase of USD 49.99; it never renews. Requires iOS 26.4 or later.

PREMIUM
On top of the free tier, with a 7-day free trial on the monthly plan for new subscribers:
- Satellite chart in high resolution (Mapbox, Maxar)
- Light chart, OSM Day and Night
- TSS charts: the shipping lanes and separation zones that decide which side of a strait a vessel may cross, by day and by night
- NOAA chart data for United States waters (not the official charts)

SUBSCRIPTION
Sirena Seafarer Premium: pay once for Lifetime, or choose an auto-renewing subscription.
- Lifetime (Founding Seat): USD 249.99 once, one account, never renews.
- Monthly: USD 14.99 per month, one account, with a 7-day free trial for new subscribers; it converts to monthly unless cancelled 24 hours before it ends.
- Annual: USD 149.99 per year, shared with your Apple Family group, currently offered at USD 69.99 for the first year.
Prices are for the United States; the App Store shows your local price before you buy. Payment is charged to your Apple Account at confirmation of purchase. A subscription renews automatically unless auto-renew is turned off at least 24 hours before the current period ends, and your account is charged for the renewal within the 24 hours before it does. Manage or cancel in Settings, Apple Account, Subscriptions.

Invite a friend: a free month of Premium for every friend whose first paid period goes through.

Terms of Use (EULA): https://sirenaclub.io/terms
Privacy Policy: https://sirenaclub.io/privacy
Support: support@sirenaclub.io

IMPORTANT
Sirena Seafarer is a personal navigation companion. It does not replace official charts, publications, a DSC radio or good seamanship. Always cross-check with official sources.

Map data (c) OpenStreetMap contributors (ODbL). Satellite (c) Mapbox (c) Maxar. AIS data: AISHub, aisstream.io.