Best Free Apps for Unlimited International Calls in 2025
Want to stay connected with your family or business clients anywhere in the world at little to no cost? Enter VoIP apps. Thanks to the VoIP (Voice Over Internet Protocol) technology, it has become easier than ever to make international calls completely free – and at affordable rates.
To help you choose the right tool, we have handpicked the best apps for unlimited international calling in 2025. Let's dive in!
Part 1: Free Unlimited Global Calling and Common Limitations
A lot of services and apps advertise free unlimited international calling experience, yet they come with various shortcomings. For instance, let's analyze a few popular services that claim free unlimited calling to international numbers:
1. Slickcall: It offers international calling at competitive rates, but unlimited calling requires a paid subscription. Moreover, its free services are limited to specific countries, making it best for frequent calling to the supported regions.
2. Intermedia Unite: This service is known for its affordable VoIP-based calling solution. However, it's tailored to enterprise use because of its costly premium plan and extensive features. Just like Slickcall, it also applies geographic restrictions to free calling.
3. Rebtel: This online service also claims to provide unlimited calling to international numbers. However, its free version is confined to certain regions with restrictions on call duration.
Thus, almost all free unlimited international call apps impose fair usage policies, restrict free service to specific countries, and also require a paid plan for unlocking all the features.
Part 2: Best VoIP Tools for Unlimited International Call
Millions of people around the world rely on VoIP apps to handle their international calling needs. These apps vary significantly in their cost structure, feature list, and target audiences to meet the diverse users' needs.
2.1 Popular VoIP Services for Enterprises and Individuals
VoIP apps have revolutionized the way individuals and businesses communicate over the internet. Here are several top-ranked services that support calling to international numbers at a low cost.
Tool 1: Zoom Phone
Pricing Structure: Free basic version, while the premium plan starts from $10/month.
Who it's for Primarily targets businesses with remote teams.
Zoom Phone is a highly scalable and friendly VoIP service for free, unlimited international calls. It offers plenty of business-level features like screen recording to live chatting, catering to small and medium enterprises' requirements.
Key Features
- Native integration with Zoom ecosystem
- Provides local numbers on the US and Canada
- Auto-attendant and SMS/MMS business messaging
- Call recording and analytics
- Highly customizable dashboard
Use Cases: It is ideal for businesses already using Zoom software, allowing for seamless integration. However, international calling requires higher premium tiers.
Tool 2: RingCentral
Pricing Structure: Free version with basic features. Starting from $25/month, the Advanced plan offers free unlimited international calling to 25 countries.
Who it's for Enterprises needing a unified communication platform to engage remote teams and international clients.
Ring Central offers cloud-based international calling functionality that allows multiple phone lines and toll-free numbers. It has various pricing tiers based on enterprise needs with a 14-day free trial period.
Key Features
- Unlimited international calling in various plans
- Easy CRM integration with Salesforce and Zendesk
- Toll-free numbers for efficient customer service
- Group calls to up to 500 participants
- Allows companies to purchase international numbers
- AI call transcription
Use Cases: It is particularly useful for medium to large enterprises needing full audio/video calls and messaging facilities.
Tool 3: Dialpad
Pricing Structure: Users can get its premium version for $15/user/month with an option for a custom package.
Who it's for Sales and support teams for seamless collaboration with international customers.
Dialpad is a one-in-all solution for AI-powered telephony solutions, offering unlimited international calling with deep insights. Its scalability, multi-call management
Key Features
- International calling add-ons
- AI call transcription
- Integration with HubSpot, Salesforce, and other tools
- Comes with call center capabilities
- Real-time assist cards and interactive voice response (IVR)
- Customizable dashboard
Use Cases: Because of its comprehensive AI-powered call analytics, it allows sales teams to stay productive. However, it offers limited international calling compared to its peers.
Tool 4: Aircall
Pricing Structure: The paid version starts from Starts at $30/user/month.
Who it's for Ideal for customer service teams and medium enterprises
If your enterprise requires high-intensity inbound or outbound international calls, try Aircall. Besides comprehensive call management functionality, it offers competitive international calling services at an additional cost based on your premium plan.
Key Features
- Call routing and callback options
- Live call monitoring
- Call whispering, warm transfers, and power dialer
- CRM integration with many services
Use Cases: Assists in providing world-class customer service to domestic and international clients. As the price is slightly on the higher side, it's best for medium enterprises.
2.2 Other VoIP Services For App-to-App Calling
App-to-app calling is the best way to make unlimited international calls without paying a single penny. This requires both the caller and the receiver to download the same app for an unlimited calling experience.
Some of the best VoIP apps for international calls include:
App 1: WhatsApp
Cost Structure: Completely free app-to-app calls with around 1MB per minute of data usage.
Limitations: No calls to regular phone or landline numbers, and it requires a phone number to sign up.
With close to 3 billion monthly users, WhatsApp is the most popular VoIP app for unlimited free calls worldwide. It also supports video conferencing and file transferring, making it ideal for personal use. Just like most VoIP apps, WhatsApp works seamlessly on both mobile data and Wi-Fi.
App 2: Skype
Cost Structure: Free Skype-to-Skype international calls, and paid credits for calls to regular numbers. It consumes around 1.5MB of data/minute of audio calls.
Limitations: Some features require a Microsoft account.
Skype is another popular VoIP service for unlimited calls worldwide to both Skype and non-Skype users. It supports video conferencing, SMS messages, and file sharing for a diverse communication experience. The cost of international calls varies by country.
App 3: Viber
Cost Structure: Free messages and calls to Viber users while calling regular numbers require prepaid credits. The internet usage is almost similar to that of Skype.
Limitations: No native desktop app
Viber is another remarkable service to make unlimited calls worldwide at little to no cost. It allows group calls of up to 20 people. But overall. It's more suited to personal communication with clients and friends anywhere in the world.
App 4: AirDroid Remote Support
Cost Structure: Free plan with basic features, along with multiple premium subscriptions. It is primarily used for real-time remote assistance to customers or family/friends.
Limitations: Unlocking all the features requires a premium subscription.
AirDroid Remote Support offers a VoIP calling feature to provide remote instructions to clients anywhere in the world. Its multi-device remote assistance makes it a reliable option for tech teams and customer service centers.
On the management side, it allows enterprises to streamline their remote processes through features like multi-device VoIP calling, screen sharing, and file transferring.
Notable Features
- Free remote calls and messages to other AirDroid users
- High-quality two-way audio
- All-in-one remote device control and management
- Unattended access to remote devices
Part 3: VoIP Providers for Businesses and Families
This section covers the 5 prominent VoIP service providers for both small businesses and families.
1. Voipfone
Pricing: pay-as-you-go pricing model, with basic plan starting from £5/user/month for small businesses.
Voipfone is a go-to VoIP service provider for UK-based small businesses needing a low-cost telephony solution. It is ideal for businesses in the UK or with limited global outreach.
Service Offerings
- Free UK number
- Call forwarding, auto-attendant, and call recording
- SMS and fax support
- Call conferencing
Limitations
- Focuses on the UK-based market with limited international support
- Basic call analytics
2. bOnline
Pricing: Start from £9.99 with 1000 UK minutes
Another UK-based service provider for free unlimited international calls online. bOnline is specifically designed to simplify business communication for small businesses in the UK and elsewhere. Unlike Voipfone, it offers bundled packages for businesses.
Service Offerings
- Advanced call routing
- Free UK numbers
- Integration with Microsoft Teams
- Free 24/7 customer support
Limitations
- No international call bundles
- Limited third-party integrations
3. Slickcall
Pricing: Works on a pay-as-you-go model, and offers various credit-based options.
If you want a versatile VoIP service provider with competitive international calling rates, give Slickcall a try. This tool is specifically designed for cross-border calling at a low cost, though unlimited plans are region-specific, mainly for the EU/UK.
Service Offerings
- Provides local numbers from various countries
- Affordable international calls
- Call forwarding
- Click-to-call browser extension
Limitations
- No video conferencing
- Basic call management features
4. Intermedia Unite
Pricing: Offers subscription-based pricing plans starting from $27.99.
It is a comprehensive unified communication platform that offers messaging, voice, and video functions. Intermedia Unite focuses on streamlining collaboration and communication through audio-video calling and file transferring. However, it has limited European coverage.
Service Offerings
- Complete UCaaS suite
- Video conferencing and team messaging
- HIPAA/GDPR compliance
- Tons of collaboration tools
Limitations
- Expensive premium plans
- Steep learning curve
4: Recommendations for Users
Based on the key features, use cases, and cost structure of these apps, here's the editor's official recommendations:
- For Individual Use: WhatsApp, Viber, and Skype
- For Families: AirDroid Remote Support, WhatsApp, Viber
- For International Landline Calls: Slickcall, Skype
- For Travelling: WhatsApp
- For UK-based SMEs: Voipfone and bOnline
- For US-based Enterprise: Intermedia unite
- For Global SMEs: Zoom Phone, RingCentral, Dialpad, Aircall, Slickcall
- For Enterprise Remote Assistance: AirDroid Remote Support
Conclusion
To sum up, unlimited international free calling has become easier than ever, thanks to VoIP services. Most of the VoIP apps that support calls to regular international numbers come with basic free versions and regional restrictions, while unlimited calling requires prepaid plans.
The apps mentioned in this article caters to divers users' needs, from personal use to travelling and business purposes. For instance, AirDroid Remote Support offers uninterrupted remote assistance for family and business clients. When choosing the unlimited calling app, always consider your calling patterns, budget, and geographic needs. Thanks you!
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