eSIM On on a cruise — the honest answer
Bought by plenty of cruise passengers, and right for only some of them. This review sets out where eSIM On genuinely helps and where it leaves you looking at an SOS icon.
Does eSIM On work at sea?
eSIM-On is a prepaid travel eSIM brand run by SIHEL PTE LTD, sold through its own iOS and Android apps and at esim-on.com. The catalogue covers 180 countries on 4G and 5G. You install by QR code, with no plastic SIM to swap, and the company’s own listing puts activation at about two minutes. On a cruise it works on land only, inside a country on that list.
Prices last confirmed
Who eSIM On is for
eSIM-On sells prepaid data-only profiles and owns no network, distributing plans through apps published under SIHEL PTE LTD and through esim-on.com. The catalogue spans 180 countries on 4G and 5G. Each profile arrives as a QR code that can be installed before travelling or after landing.
Setup happens inside the app: pick a bundle, pay by card through Stripe, and the profile is ready to scan. Usage is tracked in the app rather than through a carrier account. On Trustpilot the site holds 306 reviews at an average of 4.8, and reviewers return again and again to the WhatsApp support as the reason. One detailed complaint describes an eSIM that failed to activate at an airport.
What happens when the ship leaves port
eSIM-On runs on ordinary shore networks, the same signal a phone finds landing in any of its 180 countries. No plan has a maritime or satellite layer. A profile bought for a cruise connects once the ship is docked and the phone finds a local tower, then drops as the ship pulls away. Roughly 12 nautical miles out there is nothing left. On a multi-port cruise that means a separate bundle per stop, switched on at each port rather than one left running for the whole voyage.
What eSIM On costs, and what that buys
Pricing is by place rather than one global tier, with each of the 180 countries carrying its own data-and-validity bundles chosen and paid for in the app. The company calls the model fully prepaid: no subscription, no activation fee and no surprise roaming charge once a bundle is bought, according to its own listing checked in September 2026.
Prices shift with promotions, so neither app-store listing publishes a fixed rate card, and the storefront does not gather every country’s validity periods in one place. Pricing a specific port means opening that country’s page in the app. There is no single headline figure to check instead, which is normal for a catalogue this size.
The details that matter on a ship
| Coverage | 180 countries on 4G and 5G networks |
|---|---|
| Hotspot / tethering | Not stated in the public app-store listing |
| Data / calls / SMS | Data only; calls and SMS are not part of the listed feature set |
| Activation | QR code scan; listed as live within about two minutes |
| App | eSIM-On for iOS and Android, developer SIHEL PTE LTD |
| Payment | Card checkout via Stripe inside the app |
| Support | WhatsApp-based live chat, praised across Trustpilot reviews |
| Refunds | Not published in the app-store listings |
| Device compatibility | eSIM-capable iOS and Android handsets |
| Ratings | 4.8 out of 5 on Trustpilot from 306 reviews |
Getting it working before you sail
Buying happens entirely inside the app. Pick a country, pay by card through Stripe, and the QR code is ready at once. The listing puts activation at about two minutes after installing. Before a cruise, install and scan while still on home or hotel wi-fi, because setup needs a data connection. Then leave it switched off until the ship reaches its first port.
Where eSIM On shines, and where it does not
- Its catalogue covers 180 countries on 4G and 5G networks.
- It's fully prepaid, with no subscription, activation fee or hidden roaming charge.
- WhatsApp support draws repeated praise across 306 Trustpilot reviews.
- You buy and activate everything inside one app.
- There's no published rate card, so per-country prices sit only inside the app.
- The app-store listings don't state a refund policy.
- Hotspot or tethering support isn't mentioned in the public listing.
- One Trustpilot reviewer says their eSIM failed to activate at an airport and was never fixed.
Cruise and ferry plans
The plans database on this site holds cruise, ferry and maritime products only. eSIM On publishes none, so there is no plan table on this page. Its regional data plans remain the relevant purchase for port days.
The verdict for cruise passengers
This suits a passenger who wants one app covering every port on the itinerary and has no need for calls or texts alongside data. The 4.8-star Trustpilot score rests on WhatsApp support, which suggests problems get sorted quickly when they arise. Two gaps are worth weighing. No refund policy and no rate card are published, which leaves both pricing and worst-case outcomes vague before you pay. And it works on land only, so sea days still need a maritime eSIM or the ship’s wi-fi.
What to pair this with for sea days
For the hours between ports you need one of the three maritime providers:
Frequently asked questions
01Does eSIM On work on a cruise ship?+
No, not once you are out of sight of land. eSIM On has no maritime product at all, which means its coverage tracks the coastline: excellent in port, absent on a sea day. Treat it as a shore excursion plan.
02What company operates eSIM-On?+
SIHEL PTE LTD runs eSIM-On. It's the entity listed on the app's Apple App Store page. The public listings don't say when the company was founded, or where it's based. Those details simply aren't published alongside the app.
03Does eSIM-On charge extra fees beyond the price of a bundle?+
No, according to the app's own description. It says the service has no subscription, no activation fee and no hidden roaming charge. That applies once you buy a country bundle. The listed price of each bundle is the full price, checked September 2026.
04How is data usage tracked on an eSIM-On plan?+
Your usage is tracked inside the eSIM-On app. It's not a carrier text alert or a separate web dashboard. Push notifications are built in too, flagging your account and balance updates. Monitoring stays tied to the same app you used to buy the bundle.
05What do eSIM-On's Trustpilot reviews say about support?+
Across 306 reviews averaging 4.8 out of 5, WhatsApp support is the most repeated praise. Several named staff get credit for fast replies. One review in the same set describes an eSIM that failed to activate at an airport. That customer felt the company never took responsibility.
Compare eSIM On with
- Saily — Nord Security's travel eSIM brand, which added a dedicated Cruise tab in June 2026 covering 28 cruise and ferry operators (only one of which, P&O Ferries, is a ferry line). Its at-sea pricing is the keenest per gigabyte we track, but the plans activate only beyond 12 nautical miles — they do nothing in port, so pair one with a regular regional eSIM.
- Maya.net — Maya sells a "Global + Cruise" unlimited plan in 3, 7, 14 and 30-day windows that bundles worldwide land coverage with at-sea data on Carnival, Celebrity, Disney, NCL, Princess, Royal Caribbean and Virgin Voyages ships. It is the simplest option for anyone who refuses to think about data allowances.
- OneRoam — Unlimited data on one eSIM that covers both the ship at sea and 140+ countries on land, across 200+ vessels. Priced by duration rather than gigabytes, and the only provider we list that quotes in GBP, EUR and CAD as well as dollars.
- eSIM.dog — Sells both a huge land catalog at keen per-GB rates and — unusually — a genuine Telenor Maritime satellite plan that works at sea on 150+ named ships and ferries. The cheapest way onto a ship network at $14.49 for 100MB, and the most expensive per gigabyte beyond that.