WiFi Calling App Finder
Compare 18+ WiFi calling apps in 2026. Filter by what matters: works without a SIM, free, international, browser-based, or for calling real phone numbers.
Filter — pick what you need
Showing 18 of 18 apps, ranked by editorial score.
BubblyPhone
Our pickExcellent
Pay-as-you-go international PSTN calling from your browser — no SIM, no app, no contract.
Pros
- Pay-as-you-go from $5, no subscription
- STIR/SHAKEN A-attested caller ID
- Calls any phone number in 200+ countries
- No charge for unanswered calls
- Browser-only — no install, no permissions
Cons
- Receiving calls needs a paid US number
- No SMS
- Outbound only when the browser tab is open
Pricing: Pay-as-you-go: UK $0.04/min, India ~$0.10, Mexico $0.015, Brazil $0.019
Best for: Solo callers needing cheap international PSTN dialing without subscription
Very good
Free WhatsApp-to-WhatsApp voice calls over WiFi or mobile data. Requires a SIM-verified account.
Pros
- Free WhatsApp-to-WhatsApp voice + video
- End-to-end encrypted
- Used by 3B+ people globally
Cons
- Can't call regular phone numbers (PSTN)
- Requires SIM card + phone number to register
- Voice BLOCKED in UAE, Qatar, China, often throttled in Egypt
Pricing: Free
Best for: Calling other WhatsApp users in unblocked countries
⚠️ Blocked in: AE, QA, CN
Google Voice (Personal)
Very good
Free US/Canada outbound calling from a Google-issued US number. US accounts only.
Pros
- Free unlimited US/Canada outbound
- Free US inbound number
- Voicemail-to-text, web + iOS + Android
Cons
- US accounts only (requires US phone for verification)
- International calls metered at vendor rates
- No business features without paid Workspace tier
Pricing: Free for US accounts; international ~$0.02-$0.20/min
Best for: US-based users needing a free secondary US number
FaceTime Audio
Very good
Apple-to-Apple voice calls over WiFi. Built into every iPhone, iPad, and Mac.
Pros
- Excellent audio quality (wideband codec)
- End-to-end encrypted
- Free, native to Apple devices
Cons
- Apple devices only on both ends
- Can't call regular phone numbers
- BLOCKED in UAE
Pricing: Free (requires Apple device)
Best for: Apple users calling other Apple users
⚠️ Blocked in: AE
Signal
Very good
Privacy-focused encrypted voice + video calls. Signal-to-Signal only.
Pros
- Best-in-class end-to-end encryption
- Open source, audited protocol
- Free voice + video + messaging
Cons
- Requires SIM-verified phone number to register
- Can't call regular phone numbers
- Smaller user base than WhatsApp/Messenger
Pricing: Free
Best for: Privacy-conscious users calling other Signal users
Telegram
Very good
Cloud-based messenger with free voice + video calls. Telegram-to-Telegram only.
Pros
- Available on every platform (browser, mobile, desktop)
- Multi-device sync (unlike WhatsApp historically)
- Dominant in Russia, Iran, Ethiopia, parts of MENA
Cons
- Requires SIM-verified phone number to register
- Can't call regular phone numbers
- Default chats are NOT end-to-end encrypted (only Secret Chats are)
- BLOCKED in China
Pricing: Free
Best for: Users in Telegram-dominant markets (Russia, Iran, Ethiopia)
⚠️ Blocked in: CN
Quo (formerly OpenPhone)
Very good
US business phone number with SMS, CRM integrations, and team features.
Pros
- Real US/Canada inbound number
- SMS + voicemail-to-email
- HubSpot, Salesforce, Pipedrive integrations
Cons
- $15-$35/user/month — not free
- US-business focus; international metered separately
- Solo plans pay for unused features
Pricing: $15-$35/user/mo annual
Best for: US-based freelancers and small teams needing a business inbound number
iPhone WiFi Calling
Very good
Carrier-native feature that routes regular calls over WiFi when signal is weak.
Pros
- Uses your regular phone number
- Free with most US/UK carrier plans (Verizon, T-Mobile, AT&T, EE, Vodafone)
- Falls back to cellular when WiFi is unavailable
Cons
- Requires SIM + active voice plan
- Carrier must support WiFi Calling
- Roaming abroad over WiFi may still incur fees
Pricing: Free (included in carrier plan)
Best for: Indoor coverage gaps with weak cellular signal
Android WiFi Calling
Very good
Same as iPhone WiFi calling: carrier-native, routes regular calls over WiFi.
Pros
- Uses your regular phone number
- Free with most carrier plans
- Works on most modern Android phones
Cons
- Requires SIM + active voice plan
- Carrier must support WiFi Calling
- Implementation varies by manufacturer (Samsung, Pixel, etc.)
Pricing: Free (included in carrier plan)
Best for: Android users with weak indoor cellular signal
Microsoft Teams Free
Decent
Microsoft's positioned successor to consumer Skype. Voice + video over the internet.
Pros
- Free Teams-to-Teams voice + video
- Skype contacts/credits migration path
- Browser, desktop, mobile apps
Cons
- Designed for enterprise collaboration, not solo calling
- PSTN calling requires paid Teams Phone licence ($8/user/mo + base)
- UX is buried inside the meetings app
Pricing: Free for Teams-to-Teams; Teams Phone Standard $8/user/mo + base
Best for: Former Skype users staying in the Microsoft ecosystem
Facebook Messenger
Decent
Free Messenger-to-Messenger voice + video calls. Requires Facebook account.
Pros
- No phone number required (uses Facebook account)
- Works in browser, mobile, desktop
- End-to-end encryption (rolled out 2024)
Cons
- Requires Facebook account
- Can't call regular phone numbers
- Privacy/data concerns with Meta
Pricing: Free
Best for: Calling other Facebook users without a phone number
Viber
Decent
Free Viber-to-Viber calls + paid Viber Out for international PSTN.
Pros
- Free Viber-to-Viber voice + video
- Viber Out lets you call regular phone numbers
- Dominant in Eastern Europe and parts of SE Asia
Cons
- Requires SIM-verified phone number
- Viber Out rates often higher than dedicated VoIP services
- BLOCKED in UAE, parts of MENA
Pricing: Free Viber-to-Viber; Viber Out from $0.01-$0.50/min
Best for: Users in Eastern Europe, Philippines, Greece
⚠️ Blocked in: AE
TextNow
Decent
Free US/Canada calls + texting with a free US number. Ad-supported.
Pros
- Free US/Canada number + outbound minutes
- Free SMS to US/Canada
- Browser, iOS, Android, even works on second-hand devices without SIM
Cons
- Ads (paid tier removes them)
- US/Canada only
- Inactivity can lose your number
Pricing: Free with ads; ad-free $4.99/mo
Best for: US/Canada users needing a free second phone number
Rebtel
Decent
International calling with smart routing — works even when data is poor.
Pros
- Reliable international PSTN calling
- Smart routing falls back to local-call shortcut
- Subscription packages for heavy callers
Cons
- Requires app install
- Per-minute rates often higher than BubblyPhone
- Some destinations on subscription only
Pricing: Subscriptions from ~$10/mo or per-minute rates
Best for: Calling specific country corridors with subscription packages
KeepCalling
Decent
Prepaid international calling cards via app or browser. Established voice route.
Pros
- Reliable PSTN voice quality
- Long-standing operator (since 2002)
- Both browser and app
Cons
- Per-minute rates similar to or higher than BubblyPhone
- Older UX
- Requires prepaid balance
Pricing: Prepaid credit; per-minute rates vary by destination
Best for: Users familiar with traditional calling cards who want a modern interface
PopTox
Limited
Browser-based free international calling with a daily limit and ads.
Pros
- Free without registration
- Browser-based, works anywhere
- No app install
Cons
- Daily minute cap
- Heavy ads
- Call quality variable
- No caller ID — calls show "Unknown"
Pricing: Free with ads + daily cap
Best for: One-off short test calls
Globfone
Limited
Browser-based free calling tool with limited daily minutes and ad support.
Pros
- Free, no registration
- Browser-based
Cons
- Daily limit
- Ads
- Restricted destinations
Pricing: Free with ads + daily cap
Best for: Occasional quick calls when no other option
Call2Friends
Limited
Free browser-based PC-to-phone calls with daily limits.
Pros
- Free without registration
- Browser-based
Cons
- Strict daily limits
- Ad-heavy
- Lower call quality
Pricing: Free with limits
Best for: One-off calls when free is the only requirement
Three flavours of “WiFi calling”
The phrase “WiFi calling” covers three very different things in 2026. Knowing which one you actually need saves a lot of time.
1. Carrier-native WiFi Calling (iPhone / Android)
Built into your phone OS. Routes regular voice calls over WiFi when cellular signal is weak. Uses your existing phone number and minutes. Requires a SIM and a participating carrier. Free with most US/UK plans.
2. App-to-app voice (WhatsApp, FaceTime, Signal)
Free calls between users of the SAME app. Can't reach regular phone numbers. Most apps require a SIM-verified phone number to register. WhatsApp voice is blocked in UAE, Qatar, China.
3. VoIP outbound to real phone numbers (BubblyPhone, Google Voice, Quo)
Calls any phone number over the internet — landlines, mobiles, abroad. Free options are limited to US/Canada (Google Voice, TextNow). For international PSTN, pay-as-you-go is the safest fit (BubblyPhone). For US business inbound + CRM integration, paid per-seat (Quo, RingCentral, Aircall).
Frequently Asked Questions
What is a WiFi calling app?
A WiFi calling app lets you make phone calls over an internet connection (WiFi or mobile data) instead of using your cellular voice plan. There are two distinct categories: (1) carrier-native WiFi calling — built into iPhone and Android, routes regular phone calls over WiFi when cellular signal is weak (requires a SIM and a participating carrier); (2) third-party VoIP apps — independent apps that work without a SIM, often for free or pay-as-you-go, including BubblyPhone, WhatsApp, Google Voice, Signal, Telegram, FaceTime, TextNow, and others.
Which WiFi calling apps work without a SIM card?
Apps that work without any SIM card include BubblyPhone (browser-based), Google Voice (US only, requires Google account), TextNow (US/Canada free with ads), Skype Out replacements like Rebtel and KeepCalling (pay-per-minute international), and browser-only tools like PopTox, Globfone, and Call2Friends. Apps that REQUIRE a phone-number SIM for initial registration but then work over WiFi include WhatsApp, Signal, Telegram, and Viber.
What is the best free WiFi calling app in 2026?
It depends on your use case. For app-to-app voice with friends and family who use the same app: WhatsApp (dominant globally), FaceTime (Apple users), Signal (privacy-focused), or Telegram. For free US/Canada outbound calls to any phone number: Google Voice (requires US account) or TextNow (with ads). For international PSTN outbound: BubblyPhone (pay-as-you-go), Rebtel, or KeepCalling. There is no single free app that handles all three workflows.
Can I make international calls with a free WiFi calling app?
Yes, with caveats. WhatsApp, FaceTime, Signal, Telegram, and Viber make free internet voice calls — but only when BOTH parties are using the same app, and several apps are blocked in some countries (UAE, Saudi Arabia, Qatar block WhatsApp voice; China blocks WhatsApp entirely). For calling actual phone numbers internationally (PSTN), you need a paid VoIP service. BubblyPhone is pay-as-you-go with rates like UK $0.31/min, India $0.31/min, Mexico $0.31/min — no monthly fee.
Does WhatsApp count as a WiFi calling app?
Yes, WhatsApp voice calls work over WiFi or mobile data and don't use your cellular voice minutes. But WhatsApp can only call OTHER WhatsApp users — it cannot reach a regular phone number. WhatsApp also requires a SIM card and a real phone number to register the account initially. WhatsApp voice is BLOCKED in the UAE, Saudi Arabia (lifted in 2017), Qatar, and several other countries with state-controlled telecoms. Check our WhatsApp Voice Blocked by Country article for the current status.
Is iPhone WiFi calling the same as a WiFi calling app?
No. iPhone WiFi Calling (Settings > Cellular > Wi-Fi Calling) is a CARRIER feature — it routes your regular voice calls over WiFi when cellular signal is weak. It requires a SIM card, an active voice plan, and a participating carrier (Verizon, T-Mobile, AT&T, EE, Vodafone, etc. all support it). The call still uses your cellular phone number and counts against your minutes. It is NOT a free or independent calling app.
Are browser-based calling tools real WiFi calling?
Yes — and they have one big advantage over app-based tools: no installation, no permissions, no app-store gatekeeping. Browser-based tools like BubblyPhone, PopTox, Globfone, and Call2Friends work in any modern browser using WebRTC. The trade-off: browser tools cannot run in the background to receive inbound calls — they are outbound-only when the tab is open.
Why is Skype not on the list anymore?
Microsoft retired consumer Skype on 5 May 2025. Skype Credit pay-as-you-go ended in January 2025; the final calling-subscription wind-down completes 1 May 2026. Microsoft positioned Teams Free as the migration path, but Teams is designed for enterprise collaboration, not for solo international voice calling. Many former Skype users have migrated to BubblyPhone (pay-as-you-go international), Quo (formerly OpenPhone, for US business numbers), or carrier-native WiFi calling.
Can I use a calling app without an internet connection?
No. Every WiFi calling app, by definition, requires an active internet connection (WiFi or mobile data). The carrier-native iPhone/Android WiFi Calling falls back to cellular when WiFi is unavailable; third-party apps simply do not work without internet.
How is BubblyPhone different from WhatsApp or Google Voice?
WhatsApp is app-to-app only (can't call a regular phone number); requires SIM-based registration; blocked in several countries. Google Voice is US-only personal accounts; free US/Canada outbound; requires a Google account and a US phone for verification. BubblyPhone is browser-based, calls any regular phone number worldwide, has no SIM requirement, no app install, and works pay-as-you-go with no subscription. The three tools cover different workflows — many international callers use all three.
Need international PSTN calling without a SIM?
BubblyPhone is pay-as-you-go, browser-based, no SIM, no app, no contract. UK $0.04/min, India ~$0.10, Mexico $0.015, Brazil $0.019 and 190+ more countries.