International calls are no longer limited to traditional mobile operators. Many users now prefer international calling app solutions, including VoIP-based apps, online calling platforms, and even global eSIM providers. These options stand out for offering affordable rates and easier access while traveling abroad. In this guide, you'll find the best international calling apps, how they work, their cost-performance balance, and key usage tips.

What Is an International Calling App?

An international calling app is a tool that lets you make voice calls over the internet using Wi-Fi or mobile data, instead of relying on a traditional cellular line. Most of these apps use VoIP (Voice over Internet Protocol) technology, which transmits voice data over the internet. Compared to standard mobile calls, these apps offer more flexible pricing and often allow app-to-app calls for free. They’re available across multiple platforms, including iOS and Android, and typically require only an internet connection to operate.

How Do These Apps Work?

International calling apps use VoIP to convert voice into digital signals and transmit them via the internet. They do not require a SIM card, and calls can be made through Wi-Fi or mobile data. However, the call quality depends on your internet speed, latency, and the app’s own optimization.

Best International Phone Call Apps

Choosing the right app for international phone calls depends on your needs. Some apps provide free app-to-app calling, while others are better for low-cost calls to landlines and mobile numbers. The table below shows how some of the most popular apps compare:

Table: Comparison of top international calling apps by cost, features, and device support.

For more information, you can check out our post on the Best Travel Apps in 2025.

Disclaimer: The rates listed above are based on publicly available pricing as of June 2025. Actual costs may vary depending on the destination, service provider updates, promotions, or user location. Always check the official website or app for the most up-to-date pricing before making international calls.

Which App Offers the Cheapest International Calls?

Apps like Rebtel, Localphone, and Roamless offer some of the most affordable international calling options, depending on your location and usage needs. The growing demand for internet-based communication is reflected in global trends, as the mobile VoIP market is projected to grow from USD 49.2 billion in 2021 to USD 327.5 billion by 2031 [1]. This growth has led to a wide range of apps offering different solutions based on user needs and regional availability.

Here are some of the most notable options:

• Rebtel and Localphone offer flat rates that are ideal for frequent calls.

• Apps like TextNow provide low-cost options for U.S. users with limited international coverage.

• Roamless, while not a traditional VoIP app, can be a practical alternative when traveling, offering in-app calls over mobile data without needing a separate SIM or additional calling app.

Each of these options serves different needs, so the best choice depends on how often you call, where you're calling from, and whether you prioritize app-based features or flexibility while traveling.

What to Consider Before Choosing an International Calling App

Choosing an international calling app can be challenging, especially with the wide range of features and pricing models available today. When evaluating options, consider the following:

• Always check if the app supports calls to landlines, not just app-to-app.

• Review the cost per minute for the country you plan to call.

• Verify whether the app requires a local phone number or SIM card.

• Consider apps that offer offline credits or subscriptions.

• Evaluate privacy and data encryption options.

Considering these factors can help you select an app that aligns with both your technical requirements and cost expectations.

For more information, you can also check out our post on the Best Travel Apps for Planning.

Are International Calling Apps Safe?

Yes, but it depends on the app’s infrastructure and data handling practices. Most international calling apps rely on VoIP encryption to protect calls and messages. However, security can vary across platforms. For example, the FCC highlights that VoIP services are not subject to the same regulations as traditional phone networks, which can impact reliability and privacy [2].

• Apps like WhatsApp and Telegram offer end-to-end encryption.

• Services using mobile numbers or web-based logins may have different levels of security.

• Use apps that clearly disclose how your data is protected.

Disclaimer: The security of international calling apps varies by provider. While many use encryption technologies, not all offer the same level of protection. Users should carefully review each app’s privacy policy, data handling practices, and security features before placing calls or sharing personal information.

How to Set Up an International Calling App

Most international calling apps are easy to set up and follow a similar installation process across devices. Follow these steps to get started:

1. Download the app from the App Store or Google Play.

2. Register using your phone number or email address.

3. Add credits or connect to a Wi-Fi or mobile data network.

4. Check call rates for your destination.

5. Start calling directly from the app.

While the process is simple, checking the call rates in advance helps prevent unexpected costs and ensures better control over your budget.

Roamless for International Calls: Features and Advantages

Roamless is more than a travel eSIM. It is a mobile connectivity solution for international travel.

Its key features include:

• Works in over 200 destinations worldwide

• In-app calls from $0.01 per minute with no hidden plans or subscriptions

• Avoids roaming charges by making calls over Wi‑Fi or mobile data

• Integrated with your device’s contacts list (remember to include country code)

• No physical SIM change needed

These capabilities make Roamless a practical choice for international communication without the need for third-party VoIP apps. Roamless also delivers one of the best mobile plan experiences for international calls, with a simple pay-as-you-go model that requires no separate calling plan or extra SIM.

For more information, you can check out our page on Cheap International Calling.

How to Make International Calls with Roamless

Making international calls with Roamless is simple. You don’t need to swap SIM cards, install additional apps, or change your phone’s settings. Just make sure you have internet access and the Roamless app installed.

Follow these steps to get started:

1. Open the Roamless app on your phone.

2. Tap the “Calls” tab from the main navigation menu.

3. Dial the international number, including the country code.

4. Connect to Wi-Fi or mobile data. The app works with both.

5. Place your call. Roamless connects you directly through its network.

6. Pay per minute. Rates vary by country and are charged as you go.

This makes Roamless a reliable choice for making international calls easily, without extra configurations or hardware.

FAQ

What is the best app to use for international calls?

- For free calls, WhatsApp and Telegram are popular. For low-cost global calls, Roamless and Localphone offer affordable per-minute rates.

What is the best free international calling app?
- WhatsApp, Telegram, and Viber offer free app-to-app calls with the internet.

Does Roamless allow international calling without a SIM switch?
- Yes. Roamless uses a global eSIM and supports in-app international calls over mobile data.

Can I make international calls over Wi-Fi only?
- Yes, most VoIP apps allow calls using Wi-Fi without mobile data.

Which app is best for Android and iPhone international calls?
- Most apps work on both platforms. Roamless, Skype, and WhatsApp are compatible with both.

Are there international calling apps that work without a phone number?
- Yes. Apps like Telegram or Roamless don't require a local SIM or number to call.

What’s the cheapest way to call overseas from mobile?
- Apps like Localphone or Roamless offer low per-minute rates and no roaming fees.

Sources

[1] Allied Market Research. Global Mobile VoIP Market Size, Share & Trends, 2023 - https://www.alliedmarketresearch.com/mobile-voip-market-A47284

[2] FCC Consumer Guide. Voice over Internet Protocol (VoIP), 2019 - https://www.fcc.gov/sites/default/files/voice_over_internet_protocol_voip.pdf