International calling apps, and the question that decides which one you need

Almost every “best international calling app” list ranks apps that do fundamentally different things. WhatsApp cannot ring a landline. A carrier add-on is not an app. The useful question is not which app is best — it is whether the app can reach the person you are trying to call, and after that, what the call costs once it does.

Rates below are the live per-minute prices from our rate table, the same figures the dialer quotes. Last checked August 2026.

There are three kinds of international calling app. App-to-app services (WhatsApp, FaceTime, Telegram, Signal) are free but reach only people who installed the same app and are online. App-to-any-number services (Kinvo, Yolla, Rebtel, Skype credit) charge per minute and reach any landline or mobile, with nothing required from the person you call. Carrier add-ons (T-Mobile, Verizon, AT&T) cost $10–$15 a month, work only from the one phone on the plan, and are unlimited within a covered country list. Most people need a free app for the family who have it and a pay-as-you-go service for everyone else.

The three kinds, and what each actually reaches

App-to-app

WhatsApp, FaceTime, Telegram, Signal, MessengerFree

Free because it is not a phone call — it is data between two copies of the same app. It reaches the person only if they installed it, signed in, and have working internet at that moment. It cannot ring a landline, a work switchboard, a hotel, a bank, or a relative on a basic handset.

Reaches any phone number
They need the same app
They need internet

App-to-any-number

Kinvo, Yolla, Rebtel, Skype credit, Viber OutPer minute

Places a real call to a real number over the internet on your side and the normal phone network on theirs. The person you are calling needs nothing — no app, no account, no smartphone, no data. This is the only category that reaches everyone, and the only one you pay per minute for.

Reaches any phone number
They need the same app
They need internet

Carrier add-on

T-Mobile Stateside Talk, Verizon Global Calling, AT&T InternationalFrom $10-15/mo

Not an app at all — a feature bolted to one phone line, billed monthly whether you call or not, and usable only from that handset. Unlimited within a covered list of countries, per-minute outside it.

Reaches any phone number
They need the same app
They need internet

The middle column is the one that catches people out. On an app-to-app call, a tick means a requirement you cannot control — it is on the other person’s phone, in another country, and you find out it failed only when the call does not connect.

The number you dial costs more than the app you dial it from

Here is the part the app rankings leave out. In most of the world a mobile number costs substantially more to call than a landline in the same country, because the mobile network charges to receive the call and the landline network largely does not. On Kinvo’s current rates that gap is at least 1.5× in 46 of 127 destinations, and it runs to nearly 25× at the top. The US and Canada have no such gap at all, which is exactly why it surprises American callers — and why free app-to-app calling, which always lands on a mobile, quietly steers you to the expensive number.

Destination	Landline	Mobile	Mobile costs
Portugal	$0.06	$1.49	24.8× more
Algeria	$0.35	$5.51	15.7× more
Germany	$0.09	$1.13	12.6× more
Spain	$0.06	$0.54	9.0× more
France	$0.06	$0.49	8.2× more
Argentina	$0.19	$1.06	5.6× more
Turkey	$0.22	$0.87	4.0× more
Mexico	$0.05	$0.15	3.0× more
Morocco	$1.60	$3.23	2.0× more
United Kingdom	$0.05	$0.10	2.0× more
Poland	$0.34	$0.67	2.0× more
Philippines	$0.62	$0.89	1.4× more
Egypt	$0.62	$0.63	about the same
India	$0.21	$0.15	29% less
Colombia	$0.21	$0.12	43% less
Peru	$0.50	$0.23	54% less

It is not universal — mobile is actually the cheaper number in 28 destinations, India and Colombia among them, so the rule is worth checking rather than assuming. But where the premium exists it dwarfs the difference between any two calling services. If the person you are calling has a landline at home or at work, asking for that number is a bigger saving than switching apps, and it costs nothing to ask.

Installing a calling app without an app store

Kinvo has no download. It is a web application that places real calls over WebRTC, so it runs in whatever browser you already have — including on a work laptop where you cannot install software, on a borrowed phone, or on a desktop that has no app store at all. Nothing to update, nothing to sideload, no account with Apple or Google in the middle.

If you want it to behave like an installed app anyway, every modern browser will do that for you. On iPhone, open Kinvo in Safari, tap Share, then Add to Home Screen. On Android, open it in Chrome and tap Install app from the menu. On desktop Chrome or Edge, use the install icon in the address bar. You get a home-screen icon that opens full screen with no browser chrome — the same result as an app store install, with no app store, no download size, and no install-time permission requests beyond the microphone.

That last part is the practical difference. An installed app asks for contacts, location, and notifications at setup because it can. A browser tab is limited to what you grant it, and to place a call it only needs the microphone.

Five things to check before you install any calling app

Does it dial a number, or only other users?

The single question that decides whether the app is useful for the call you actually need to make. An app that only reaches other users of the same app is a messenger, not a calling app, and it will fail at exactly the wrong moment — a hospital, a landlord, a consulate, a grandparent.

Does the credit expire?

Several services void unused balance after a period of inactivity — Viber Out expires credit after 180 days idle, and prepaid calling cards commonly carry both expiry dates and per-call maintenance fees. International calling is lumpy by nature, so a balance that dies during a quiet stretch is a real cost. Kinvo credits do not expire.

What shows up on their phone?

Some apps present an unfamiliar or withheld number, which is a good way to be sent to voicemail by someone who was waiting for your call. Check whether you can verify your own number as caller ID before you rely on it.

Is there a per-call fee on top of the per-minute rate?

Connection fees, service fees, and rounding rules are where advertised headline rates stop matching the receipt. Kinvo charges $0.05 on answered calls only and rounds to the minute; whatever service you pick, find that number before you compare per-minute prices.

What does it want access to?

A calling app needs a microphone. It does not need your full contact list, your location, or your photo library to place a call, and an app store install is where those permissions get requested. Anything running in a browser tab is limited to what the tab is granted.

No download, no app store, no subscription

Kinvo calls landlines and mobiles in 220+ countries from a browser tab. The person you call needs nothing — no app, no smartphone, no internet. Pay per minute, and credits never expire.

Start Calling See per-country rates

Common questions

What is the best app for international calls?

It depends entirely on whether the person you are calling has the same app. If they do, and they have reliable internet, WhatsApp or FaceTime is free and nothing beats free. If they do not — or you are calling a landline, an office, a clinic, or someone on a basic handset — you need a service that dials real numbers, and then the comparison is per-minute rate, connection fee, and whether the credit expires. Most people need both and use the free app for family who have it, and a pay-as-you-go service for everyone else.

Is there a free app for international calls to any number?

Not sustainably. Calls to real phone numbers terminate on someone else's network, and that network charges for it — that termination cost is why every service that dials real numbers charges per minute, and why the ones advertising free calls fund it with ads, a short trial, or app-to-app-only calling. Apps that are genuinely free are app-to-app: both sides install the same thing and no phone network is involved.

Do I need to install anything to call internationally?

No. Kinvo runs in a browser tab over WebRTC, so a laptop, a work machine, or a borrowed phone can place the call with nothing installed and no app store account. If you want it to behave like an installed app, your browser can add it to your home screen — see the section above — but that is optional and there is no download either way.

Why does calling a mobile cost more than calling a landline?

Because in most of the world the mobile network charges to terminate an incoming call, and the landline network largely does not. The US and Canada are unusual in having no such difference, which is why the gap surprises American callers. On Kinvo's current rates it applies to a majority of destinations and the size of it is not small — a Portuguese mobile costs about 25 times a Portuguese landline. Ask for the landline where one exists.

Are calling apps safe to use?

The call audio itself is encrypted in transit on any reputable service, Kinvo included. The more practical risk is what an installed app collects around the call — contact lists, location, and identifiers are commonly requested at install and are not needed to place a call. A browser-based service can only access what the tab is granted, which for calling is the microphone.