Saily: eSIM Data for Travel

Review by eFreeware

Saily is a travel connectivity app from Nord Security, the company behind NordVPN. It sells prepaid eSIM data plans for more than 200 destinations, and the pitch is simple: buy a plan in the app, install the digital SIM, and have mobile data when you land instead of hunting for a local SIM card or paying roaming charges.

The free download has a 4.6 average from over 98,000 ratings, and the install count sits above five million, which puts it in the small group of travel eSIM apps with real traction. What makes it worth a closer look is the combination of breadth and simplicity: one app covers local, regional and global plans, and the whole transaction happens before you leave home.

I'll go through what the app actually does, where the practical friction sits, and which travelers will get the most out of it.

Data that works the moment you land

The core job is straightforward. You pick a destination or region, buy a prepaid data plan, install the eSIM, and activate it when you arrive. The developer says the app connects your device to leading local networks, so your phone behaves roughly like a local one for data purposes. That is the promise, and it is the reason most people would install this.

What I like about the framing is that it is sold as prepaid data rather than a phone plan. You are not signing a contract or committing to a monthly bill; you buy a block of data for a trip and use it. The app also lets you top up in a few taps if you run through your allowance, which is the kind of thing that matters when you are mid-trip and need more data before the end of the day.

There is no roaming fee attached to these plans, which is the headline benefit. For anyone used to paying per-megabyte charges abroad, the appeal is obvious: a fixed, transparent price agreed before you travel.

Keeping your regular number alive

One detail that stands out is how the eSIM coexists with your existing SIM. Saily works as a second data profile in your phone's settings, the developer says, leaving your main SIM free for calls and texts. That means you can keep your usual number reachable for messages and calls while your data runs through the travel plan.

This matters more than it sounds. Many travelers want to stay contactable on their normal number — for banking codes, family messages, work — without paying data rates on it. Having the two profiles side by side in your phone settings is the practical answer, and it is one of the clearer reasons to choose an eSIM over swapping physical cards.

The app also lets you track usage and check the validity period of your plan, so you can see how much data is left and when it expires. If your itinerary changes, you can buy a new plan for the next country or region without leaving the app.

Local, regional and global plans

Saily's digital store covers three shapes of plan: local, regional and global. A local plan fits a single destination; a regional one suits a multi-country trip within the same area; a global option is for itineraries that cross continents. The idea is that you match the plan to the route rather than buying one blanket package.

That flexibility is the strongest argument for the app over a single-country eSIM bought at the airport. If you are doing a two-week trip through several countries, a regional plan saves you from buying and installing a new eSIM at every border. The ability to top up and buy new plans as your route changes means the app can follow a trip rather than being locked to the first destination.

Coverage is listed at more than 200 destinations, which is broad enough that most common travel routes should be included. The app checks availability for your destination during setup, so you can confirm before buying.

Getting set up before you fly

The setup flow is guided, which is the part that matters for anyone who has never touched an eSIM. You download the app, check availability for where you are going, choose a plan, install the eSIM by following the in-app instructions, and activate it on arrival. Setup takes only minutes per the developer, and help is offered in the app while you install, activate or change plans across countries.

The one requirement to check before buying is device support. The app notes that most recent Android devices support eSIM technology, but not all do, and an eSIM is a hardware feature rather than something the app can add. If your phone does not support it, the app cannot help, so it is worth confirming compatibility before you purchase a plan.

The other sensible step is timing. Because the eSIM is installed digitally, you can set it up before departure and activate it when you land. Doing the installation at home on reliable Wi-Fi is easier than trying to complete it in an airport with patchy signal, and the guided flow is designed to be followed in that order.

Optional security while you browse

Beyond connectivity, the app includes optional security features: a virtual location, ad blocking and web protection against risky domains. These are extras rather than the core product, but they make sense given the developer's background in security software.

I would treat them as a bonus rather than the reason to install. If you are already using a VPN or a secure browser, you may not need them. If you are not, having a few protective options inside the same app you use for travel data is a convenience, particularly on public networks where you might otherwise be cautious about what you open.

The security tools are described as optional, so they do not get in the way of the main job of buying and managing data plans.

Who gets the most from Saily

This app fits travelers who want data sorted before they leave and do not want to deal with a shop on arrival. If you take one or two international trips a year, value transparent pricing and prefer to keep your regular number active, the combination of prepaid plans and a guided install is a good match. It also suits people doing multi-country trips, where a regional plan is simpler than buying a new eSIM at each stop.

It is less obviously aimed at anyone who needs a local phone number for calls, since the eSIM is a data profile and your primary SIM handles calls and SMS. Travelers who rarely leave home, or who are happy with their carrier's roaming package, will not find much here they need. And anyone whose phone does not support eSIM technology cannot use it at all, regardless of how good the plans look.

The free download keeps the entry point low. The cost is in the data plans themselves, which you buy inside the app.

A practical pick for connected travel

Saily does one job well: it gets you prepaid mobile data abroad without a physical SIM or a roaming bill. The security extras are a reasonable bonus from a developer with a track record in that space.

The caveats are the ones you would expect. You need a phone that supports eSIM, and you need to buy a plan before you can use the service. The download is free, but the data itself is a purchase. For travelers who plan ahead and want predictable costs, that trade is easy to accept.

If you take international trips and want data ready the moment you land, this is worth installing. If you rarely travel or your phone lacks eSIM support, there is little reason to bother.

What's new in version 3.58.0

A few behind-the-scenes tweaks were made for a quicker, more seamless ride.