Who brings what
On the “Shared” packing list everyone commits: “I'll bring 2”. Next to each item you see whether it's covered, missing or coming twice. That way the Bluetooth speaker comes once, not three times.
In the crew's group chat every arrangement disappears after three days under photos and voice messages. In Crewsy it sits next to the thing it is about: the meal, the item, the receipt.
On the “Shared” packing list everyone commits: “I'll bring 2”. Next to each item you see whether it's covered, missing or coming twice. That way the Bluetooth speaker comes once, not three times.
Every dinner has a cooking team. The meal plan shows how many meals are still missing; evenings in the restaurant you simply leave out.
The shopping list comes from the meals, grouped by aisle in supermarket order. If you split up in the shop, everyone sees within seconds what the others already have in the trolley, and Crewsy remembers who it was.
Whoever pays adds the expense with a photo of the receipt. Crewsy keeps the balances and shows at the end who transfers what to whom.
Every change to meals, lists, crew and expenses is in the history, with name and time. The question “Who was that?” answers itself.
German or English: everyone on board sets their own language. A mixed crew sees the same list, each in their own language.

The skipper creates the trip and sends the invitations: each crew member gets their own link, valid for 14 days. Whoever opens it comes aboard with their own account or via quick access with a name and password. Invitations, trip info and tracks stay with the skipper; the role appears next to every name and on the sea miles confirmation.
If you're still looking for crew or a berth, you'll find them on a crew-finding site. Crewsy starts afterwards, once the crew is set and the questions begin: who brings the coffee maker, who cooks on Tuesday, who paid the harbour fees.
Create the trip, send the links, and the arrangements land where they belong. Free for 14 days, the crew never pays.