10 Best Free WiFi Calling Apps for Android and iPhone

What WiFi Calling Actually Does

WiFi calling routes your voice through an internet connection instead of cell towers. Your words get converted into data packets, sent over a WiFi network (or mobile data), and reconnected to the phone network at the other end.

The practical effect: you can call a regular phone number from anywhere with an internet connection. Basement with no signal? Works. Hotel in a foreign country? Works. The person you call does not need any special app or equipment.

Two kinds of WiFi calling exist, and the distinction matters:

• Carrier WiFi calling is built into your phone by your mobile provider (AT&T, Vodafone, etc.). It uses your existing phone number and plan minutes. Useful when you have poor cell signal at home, but useless for cutting international costs since roaming rates still apply abroad.
• Third-party WiFi calling apps are standalone applications that route calls through their own VoIP infrastructure. These bypass your carrier entirely. International rates are typically 70-95% cheaper than carrier charges.

This guide focuses on third-party apps, since those are what actually save money on international calls.

WiFi Calling Apps Compared

Here is how the most popular WiFi calling apps compare on the factors that matter: whether they call real phone numbers, what they cost, and whether they require registration.

App	Calls regular phones	Free app-to-app	Registration	US rate/min	Minutes expire
Telvio	Yes	No	None needed	$0.02	Never
WhatsApp	No	Yes	Phone number	N/A	N/A
Skype	Yes	Yes	Microsoft account	$0.025	180 days
Google Voice	Yes (US/CA only)	No	Google account	Free (US)	N/A
Viber Out	Yes	Yes	Phone number	$0.019	180 days
FaceTime	No	Yes (Apple only)	Apple ID	N/A	N/A
Signal	No	Yes	Phone number	N/A	N/A
Telegram	No	Yes	Phone number	N/A	N/A

The table reveals a clear split. Apps like WhatsApp, Signal, and Telegram offer free calls between users, but they cannot reach regular phone numbers. If the person you need to call does not have the same app, you need a service that connects to the traditional phone network.

Best Apps for Calling Real Phone Numbers

These apps connect to actual landlines and mobile phones worldwide. The person receiving the call does not need any app installed.

Telvio

Telvio takes a different approach from most calling apps: no registration at all. You download the app, open it, and dial. No email, no password, no phone number verification.

The pricing model is also unusual. Instead of monthly subscriptions or credit that expires, you buy credit packages ($1.99, $4.99, or $9.99) and they stay on your account permanently. Rates start at $0.02/min to the US and $0.02/min to UK landlines.

Every new install gets one free minute to test call quality before committing. The app works identically on iPhone and Android.

Best for: People who need occasional international calls without committing to a subscription or creating yet another account.

Skype

Skype has been around since 2003 and remains one of the most established VoIP services. "Skype Credit" lets you call regular phone numbers, while Skype-to-Skype calls are free.

Rates are competitive (US: $0.025/min) but credits expire after 180 days of inactivity. Skype also offers monthly subscription plans for unlimited calling to specific countries, starting at around $3/month for a single country.

The downside: Skype requires a Microsoft account, the app has become bloated with features over the years, and call quality can be inconsistent on unstable connections.

Best for: People already embedded in the Microsoft ecosystem who want both video and voice calling.

Google Voice

Google Voice provides a free US phone number and free calling within the US and Canada. International rates apply for other countries.

The catch: it is only fully available in the United States. Users outside the US can make calls through the app but with limited functionality. You need a Google account and, originally, a US phone number to set it up.

Best for: US-based users who primarily call within the US and Canada and want a free secondary phone number.

Viber Out

Viber combines free in-app messaging and calling with "Viber Out" for calling regular phone numbers. Rates are competitive ($0.019/min to the US), and the app has a strong presence in Eastern Europe and parts of Asia.

Like Skype, credits expire after 180 days without use. The app also requires your phone number for registration.

Best for: Users who already have contacts on Viber and want calling to regular phones as an add-on.

Best Apps for Free App-to-App Calling

These apps are free but only work when both people have the same app installed.

WhatsApp

With over 2 billion users globally, WhatsApp is the default communication app in much of the world outside the US. Voice calls between WhatsApp users are free and generally high quality.

The limitation is fundamental: you cannot call a landline, an office phone, or anyone who does not have WhatsApp. For many international users, though, this is not a limitation at all since their entire social circle is on WhatsApp.

Signal

Signal uses end-to-end encryption for all calls and messages, making it the strongest option for privacy. Call quality is good, and the app is free with no ads or tracking.

The user base is smaller than WhatsApp, so you may need to convince your contacts to install it.

FaceTime Audio

If both parties use Apple devices, FaceTime Audio provides excellent call quality with zero setup. It is built into every iPhone, iPad, and Mac.

The obvious limitation: it does not work with Android or Windows devices.

How to Set Up WiFi Calling

Setting Up Carrier WiFi Calling

If you want to use your carrier's built-in WiFi calling (useful for poor signal areas, not for international savings):

On iPhone:

1. Open Settings
2. Tap Phone
3. Tap WiFi Calling
4. Toggle "WiFi Calling on This iPhone" to on
5. Confirm your emergency address when prompted

On Android (varies by manufacturer):

1. Open Settings
2. Go to Connections (Samsung) or Network & Internet (stock Android)
3. Tap WiFi Calling
4. Toggle it on

Your carrier must support WiFi calling and your plan must include it. Contact your provider if you do not see the option.

Setting Up a Third-Party App

For apps like Telvio that call regular phone numbers:

1. Download the app from the App Store or Google Play
2. Open the app (some require account creation, Telvio does not)
3. If calling regular phones, add credit or buy a minute package
4. Dial the number with country code (e.g., +1 for US, +44 for UK)
5. Make sure you are on WiFi or have a stable data connection

Minimum connection requirements: 1 Mbps upload and download for clear voice. Most home WiFi and 4G/5G connections easily exceed this. Hotel WiFi and airport hotspots can be unreliable, so test before making important calls.

What Affects WiFi Call Quality

Call quality on WiFi calling apps depends on three things:

1. Your internet connection. This is the biggest factor by far. A stable 4G or home WiFi connection produces calls that sound as good as regular phone calls. An overloaded public hotspot will cause echo, delay, and dropped audio.

2. The app's codec. Modern codecs like Opus (used by most current apps) adapt to your connection speed in real time. If bandwidth drops, the codec compresses audio more aggressively rather than dropping the call. Older apps using legacy codecs handle this worse.

3. Network routing. The distance between you and the VoIP provider's server matters. Apps with servers in multiple regions (not just the US) generally perform better for calls from Europe, Asia, or Africa.

Practical tips for better call quality:

• Use 5 GHz WiFi instead of 2.4 GHz when available (less interference)
• Stay within reasonable range of the WiFi router
• Close bandwidth-heavy apps (video streaming, large downloads) during calls
• If WiFi is unstable, switch to mobile data (4G/5G is often more reliable than weak WiFi)

Costs: What You Actually Pay

The real cost of WiFi calling depends entirely on how you use it.

If both people have the same app: Completely free. WhatsApp, Signal, FaceTime, and Telegram charge nothing for voice calls between users.

If you need to call a regular phone number abroad: Expect to pay between $0.01 and $0.50 per minute depending on the destination country. For reference:

Destination	Typical VoIP rate	Typical carrier roaming rate
United States	$0.01-0.03/min	$1.50-3.00/min
United Kingdom	$0.01-0.02/min	$1.00-2.50/min
Germany	$0.01-0.02/min	$1.00-2.50/min
India	$0.04-0.10/min	$2.00-5.00/min
Brazil	$0.05-0.15/min	$2.00-4.00/min
Nigeria	$0.10-0.25/min	$3.00-5.00/min

The savings compared to carrier roaming are consistently 90%+ across all destinations. Even compared to international calling cards, VoIP apps are typically 30-50% cheaper.

Watch for hidden costs: some apps charge connection fees per call, others charge per-minute in 60-second increments (so a 61-second call costs for 2 minutes). Telvio rounds to the nearest second with no connection fee.

Choosing the Right App

The decision comes down to one question: do you need to call regular phone numbers, or just other app users?

If everyone you call already uses WhatsApp or another messaging app, you do not need anything else. Free app-to-app calling works well.

If you need to reach landlines, office phones, or people who do not use messaging apps, you need a VoIP service that connects to the phone network. Among those, the choice depends on:

• How often you call: Occasional callers benefit from pay-as-you-go (Telvio, Skype Credit). Regular callers might save with a monthly plan (Skype subscription).
• Whether you want to register: Telvio requires no registration. Most others require at least an email.
• Credit expiration: Telvio minutes never expire. Skype and Viber credits expire after 180 days of inactivity.
• Where you call: Rates vary by destination. Check the specific rate for your most-called country before committing.

For travelers and expats who need a simple, reliable way to call real phone numbers abroad without setting up accounts or worrying about expiring credit, Telvio covers the basics well. Download it from the App Store or Google Play and test with the included free minute.