How CruiseChattr Works
Messaging that reaches every corner of the ship — powered by the phones around you. Free for crew and their families at home.
Where a connection runs out
A cruise ship is a floating city of steel. Buy the best connection aboard and there are still places, and moments, where a message simply will not go.
Steel decks and bulkheads. Interior cabins, stairwells, engine-side corridors and lift lobbies are where any signal struggles first.
Off the ship entirely. Tender boats, the beach in port, an excursion coach — well past the reach of anything you bought aboard.
Eighteen decks, twenty venues, three pools. Finding your family shouldn't mean walking the whole ship twice.
Where CruiseChattr still works
It works alongside whatever connection you choose to buy — and carries on where that connection stops.
The Mesh Solution
CruiseChattr uses Bluetooth Low Energy to create a mesh network across the entire ship. Your message hops from phone to phone until it reaches the recipient — all without internet.
A message travels from Dad through 3 relay phones and arrives at Daughter, without using the internet.
Dad sends a message
Dad types "Meet at the pool deck!" and hits send. The message is encrypted and broadcast via Bluetooth.
Nearby phones relay
Other CruiseChattr users' phones automatically pick up the encrypted packet and pass it forward — they can't read it.
Daughter receives it
The message reaches Daughter's phone, is decrypted with her private key, and appears in the chat. Done!
Store-and-Forward
If there is no direct path to the recipient, relay phones store the encrypted message and forward it whenever they come near another CruiseChattr user. Think of it like a digital game of telephone — except the message stays perfectly encrypted the entire time.
- 1
You send. It is sealed on your phone.
- 2
Nobody is between you. It does not fail — it waits.
- 3
A passing phone takes the sealed copy. It cannot open it.
- 4
That passenger walks aft. Delivered.
A message with no available route is held by a passing passenger's phone, still encrypted, and delivered when that passenger moves within range of the recipient.
Security & Privacy
Your messages are private. Period.
End-to-End Encrypted
Messages are encrypted on your device before transmission. Only the intended recipient can decrypt and read them.
Relay Phones Can't Read
Phones that relay your messages only see encrypted data. They have no way to access the content of your conversations.
Sealed Between Phones
Messages between phones are locked on your device with keys only you and the recipient hold — we carry a parcel we cannot open. Messages typed into the web portals are the exception: a browser has no such key, so those reach us readable. We never profile you, and nothing is sold.
The Network Effect
CruiseChattr gets better with every user. Each phone on the ship becomes a relay node, creating more paths for messages to travel.
- 10users
Enough for your own group. Anyone in Bluetooth range gets it straight away; further afield, it waits for someone to walk.
- 100users
Coverage across several decks. Most of the busy public spaces have someone in them, so there is usually a path.
- 500+users
Ship-wide. Paths exist in most directions at most hours, and a message rarely has to wait long for a carrier.
Frequently Asked Questions
Everything you need to know about CruiseChattr.
Yes! CruiseChattr uses Bluetooth Low Energy (BLE), which is built into every modern smartphone. Messages hop from phone to phone through our mesh network. No internet connection, no ship WiFi, and no cellular signal required.
If the person you are messaging is within Bluetooth range — roughly 30 meters, so the same venue or the deck below — it arrives in seconds. Further than that, the message waits for someone to carry it, and how long that takes depends on how many people aboard are running the app and how much they move around. Busy public decks are quick. A quiet corridor at 3am is not.
No. A message sent from the app is encrypted on your device before it goes anywhere, using a key only you and the person you are writing to hold. Relay phones carry a sealed packet and have no way to open it — and neither do we. The one exception is a message typed into the family or crew portal on the web: a browser has no mesh key to seal it with, so that message reaches our server readable before it enters the mesh. If that matters to you, send it from the app.
Bluetooth Low Energy is built for exactly this — it is the same radio your watch and your headphones sit on all day. CruiseChattr uses it in short bursts rather than holding a connection open, which is far lighter than keeping WiFi or cellular hunting for a signal. We would rather not print a percentage we have not measured across a real sailing; if it turns out to cost you more than you expected, tell us and we will publish the real figure.
No — CruiseChattr works with no internet connection at all. It also works perfectly well alongside a ship WiFi package: keep your plan for browsing and video calls, and let CruiseChattr carry family messages in the places a signal cannot reach. Crew, and the families waiting for them at home, use it free.
CruiseChattr works even with a small number of users. If your family members are nearby (within Bluetooth range of about 30 meters), messages are delivered directly. As more passengers install the app, the mesh network grows stronger and messages travel faster across the entire ship.
Ready to Try It?
Download CruiseChattr before your next cruise and stay connected with your family. Free to download, and free for the life of a crew member's contract.