iPhone has a built-in advantage that Android doesn't: FaceTime. It's the best free calling app on any platform — but it only works with other Apple users. For everyone else, you need alternatives. We tested 9 apps specifically on iPhone to find which ones deliver the best experience on iOS.
Key iPhone advantage: TextNow's free eSIM is only available on iPhone — Android users have to buy a $4.99 SIM card. This makes iPhone the best platform for zero-cost phone service.
App Store Ratings & Sizes
| App | Size | App Store | Calls Real #s? | CallKit? |
|---|
| FaceTime | Pre-installed | Built-in (no rating) | ❌ App-only | Native |
| WhatsApp | ~180 MB | 4.7★ (1.2M+ ratings) | ❌ App-only | ✅ Yes |
| Google Voice | ~130 MB | 2.9★ (42K ratings) | ✅ | ✅ Yes |
| TextNow | ~120 MB | 4.8★ (685K+ ratings) | ✅ | ✅ Yes |
| Signal | ~150 MB | 4.8★ (760K+ ratings) | ❌ App-only | ✅ Yes |
| Telegram | ~100 MB | 4.0★ (250K+ ratings) | ❌ App-only | ⚠️ Limited |
| Dingtone | ~95 MB | 4.5★ (73K+ ratings) | ✅ | ✅ Yes |
| Talkatone | ~75 MB | 4.1★ (28K+ ratings) | ✅ | ✅ Yes |
| Viber | ~200 MB | 4.5★ (410K+ ratings) | ✅ | ✅ Yes |
#1 · Best for Apple Users
FaceTime
Built into every iPhone — crystal-clear calls to all Apple devices, zero setup
Free Built-in
📱 Pre-installed
⭐ Built-in (no rating)
Key Features
✦Free voice + video calls to all Apple devices
✦SharePlay — watch movies/listen to music together on call
✦Spatial Audio for natural conversation feel
✦FaceTime Links — invite Android/Windows users via browser
✦Live Captions during video calls
✦Works over Wi-Fi and cellular
✓ Pros
• Best call quality on any platform — period
• Zero setup — already on your iPhone
• Spatial Audio makes group calls feel natural
• FaceTime Links bridge the Apple/Android gap
• Deep iOS integration (Siri, contacts, CallKit)
✗ Cons
• Full features only between Apple devices
• FaceTime Links for non-Apple users are limited (no audio-only)
• Can't call landlines or regular phone numbers
• No standalone phone number provided
• Useless if your contacts are mostly on Android
Best For
Anyone whose friends and family are on iPhones, iPads, or Macs
Skip If
Your contacts are mostly Android users or you need to call landlines
#2 · Best Cross-Platform
WhatsApp
The one app that works with everyone — Apple, Android, desktop, 3B+ users
Free No ads
📱 ~180 MB
⭐ 4.7★ (1.2M+ ratings)
Key Features
✦Free voice + video calls worldwide
✦E2E encrypted — all calls by default
✦Group video calls up to 32
✦Multi-device: iPhone, iPad, Mac, web
✦~0.5 MB/min voice data usage
✓ Pros
• Works with Android contacts — FaceTime can't
• 3B+ users — everyone has it
• Excellent iOS integration with CallKit
• WhatsApp calls appear on lock screen like real calls
• Backup to iCloud
✗ Cons
• App-to-app only — can't call landlines
• 180 MB — one of the larger apps
• Meta collects call metadata
• Needs phone number to register
• No phone number feature
Best For
iPhone users who need to call both Apple and Android contacts
Skip If
All your contacts are Apple users (just use FaceTime)
#3 · Best Free US Number
Google Voice
Free US number on iPhone with zero ads — Google's answer to a second line
Free US only
📱 ~130 MB
⭐ 2.9★ (42K ratings)
Key Features
✦Free US number + voicemail transcription
✦Unlimited US/Canada calls
✦AI spam filtering
✦Works alongside your main iPhone number
✦Call forwarding to iPhone's native dialer
✓ Pros
• Zero ads — ever
• Permanent number, never recycled
• Higher verification acceptance than VoIP competitors
• Integrates with iPhone contacts
• Web app for calling from Mac/iPad
✗ Cons
• US-only sign-up
• Needs existing US number for verification
• App Store rating is mediocre (2.9★)
• 130 MB is larger than expected
• No eSIM or cellular fallback
Best For
US iPhone users who want a free, ad-free second number
Skip If
You're outside the US or need cellular calling without Wi-Fi
#4 · Best Phone Replacement
TextNow
Free eSIM on iPhone — turns any iPhone into a fully working phone for $0/month
Free Ad-supported + free eSIM
📱 ~120 MB
⭐ 4.8★ (685K+ ratings)
Key Features
✦Free US/Canada number — no carrier needed
✦Free eSIM on iPhone (no SIM card purchase needed)
✦Unlimited calling + texting over Wi-Fi and 5G
✦International calling to 230+ countries
✦CallKit integration — calls appear natively
✓ Pros
• FREE eSIM on iPhone — unique advantage over Android
• 4.8★ highest-rated free calling app on App Store
• No existing phone number required to sign up
• Full phone replacement — works without a carrier
• CallKit makes it feel like a native phone app
✗ Cons
• Constant ads — removal $6.99/week
• Number recycled after 30 days idle
• Poor verification acceptance
• 120 MB app size
• Ads drain battery faster than ad-free apps
Best For
iPhone users without a carrier plan — the free eSIM makes this the best zero-cost phone option on iOS
Skip If
You already have a carrier plan and hate ads
#5 · Most Private
Signal
Zero-metadata encrypted calls — the most private app you can install on iPhone
Free Non-profit
📱 ~150 MB
⭐ 4.8★ (760K+ ratings)
Key Features
✦Free encrypted voice + video calls
✦Zero metadata collection — proven in court
✦Self-destructing messages
✦Group calls up to 40
✦CallKit integration on iOS
✓ Pros
• Most private calling app available on any platform
• 4.8★ on App Store — matches TextNow
• CallKit — calls ring like normal phone calls
• Non-profit, no ads, no tracking
• Regular iOS updates and security patches
✗ Cons
• Only 40M users — limited contact base
• Can't call regular phone numbers
• 150 MB is relatively large
• Requires phone number to register
• No phone number feature
Best For
Privacy-focused iPhone users who want the gold standard of encrypted calling
Skip If
Your contacts don't use Signal or you need to call real phone numbers
#6 · Best for Groups
Telegram
Powerful calling + massive communities — the lightest major app on iPhone
Free Premium optional
📱 ~100 MB
⭐ 4.0★ (250K+ ratings)
Key Features
✦Free voice + video calls
✦Video calls up to 1,000 viewers
✦Screen sharing + noise suppression
✦Groups up to 200K members
✦True multi-device (no phone dependency)
✓ Pros
• 100 MB — lighter than WhatsApp or Signal on iOS
• True multi-device — works on iPad independently
• 1,000-person video calls
• 2 GB file sharing
• Cloud-based message sync
✗ Cons
• E2E encryption not on by default for calls
• 4.0★ lower than competing apps
• Can't call real phone numbers
• Requires phone number initially
• Less reliable call quality than WhatsApp/FaceTime
Best For
Community managers and creators who need large group calls on iPhone
Skip If
You want maximum call quality/reliability or privacy by default
#7 · Cheapest International
Dingtone
Call any phone number worldwide from your iPhone — from $0.01/minute
Free + Credits Earn or buy
📱 ~95 MB
⭐ 4.5★ (73K+ ratings)
Key Features
✦Free US/Canada/UK number
✦Call any landline or mobile globally
✦Earn credits via ads/check-ins
✦Group calling + fax
✦CallKit integration on iOS
✓ Pros
• Cheapest international landline rates
• 4.5★ — well-rated on App Store
• CallKit makes calls feel native
• Fax feature included
• Multiple country numbers
✗ Cons
• Credit-earning is slow
• Ads are frequent
• Interface needs modernization
• Call quality varies by destination
• Heavy callers must buy credits
Best For
iPhone users calling landlines in India, Philippines, Nigeria, etc.
Skip If
You only call within the US or don't want to deal with credits
#8 · Best for Travel
Talkatone
Lightweight free calling that works on hotel Wi-Fi — perfect iPhone travel companion
Free Ad-supported
📱 ~75 MB
⭐ 4.1★ (28K+ ratings)
Key Features
✦Free US/Canada calling + texting
✦Voicemail, caller ID, call blocking
✦Low-cost international credits
✦CallKit integration
✦Works on old iPhones (iOS 13+)
✓ Pros
• 75 MB — lightest full-featured calling app
• Works well on slow hotel Wi-Fi
• Less aggressive ads than TextNow
• Supports older iPhones
• Simple, no-frills interface
✗ Cons
• No iPad or Mac app
• International calling costs credits
• Occasional call drops
• Fewer features than competitors
• Smaller user community
Best For
Travelers who want a lightweight free US number on their iPhone
Skip If
You want multi-device support or a permanent number
#9 · Best for Eastern Europe
Viber
Free Viber calls + cheap Viber Out to real phones — dominant in 40+ countries
Free + Viber Out From $0.01/min
📱 ~200 MB
⭐ 4.5★ (410K+ ratings)
Key Features
✦Free Viber-to-Viber calls worldwide
✦Viber Out — call real phones at low rates
✦Group calls up to 50
✦E2E encryption on private chats
✦CallKit on iOS
✓ Pros
• 4.5★ on App Store — well-reviewed
• Viber Out rates are very competitive
• Huge in Eastern Europe and Philippines
• Encrypted messaging
• CallKit integration
✗ Cons
• 200 MB — largest app on this list
• Ads in chat list
• Not widely used in US/UK
• Owned by Rakuten — data concerns
• Desktop app is bloated
Best For
iPhone users communicating with contacts in Eastern Europe, Philippines, or SE Asia
Skip If
Your contacts are in the US/UK/Latin America where Viber adoption is low
4 iPhone-Specific Mistakes to Avoid
⚠️ Not enabling TextNow's free eSIM
Many iPhone users don't realize TextNow offers a free eSIM — no $4.99 SIM purchase needed like on Android. Go to TextNow Settings → Activate eSIM → follow iPhone prompts. This gives you 5G access without any carrier plan.
⚠️ Using FaceTime to call Android users
FaceTime Links let Android users join video calls via browser, but the experience is limited — no audio-only calls, poor quality on older browsers, and the Android user can't initiate calls. For Apple-to-Android calling, use WhatsApp instead.
⚠️ Not checking App Privacy Labels before downloading
iPhone shows Privacy Labels on every App Store listing. Check 'Data Linked to You' before downloading any calling app. Signal and FaceTime collect the least data. WhatsApp and Viber collect the most.
⚠️ Forgetting to allow notifications for calling apps
If you denied notification permissions, you won't receive incoming calls. Go to Settings → Notifications → [app name] → Allow Notifications → enable Sounds and Lock Screen. Critical for apps like TextNow and Talkatone where you receive calls from unknown numbers.
Frequently Asked Questions
What is the best free calling app for iPhone?
+Can I make free calls on iPhone without a carrier plan?
+Does TextNow's free eSIM really work on iPhone?
+Which calling app has the best quality on iPhone?
+Can free iPhone calling apps call landlines?
+Do these apps support CallKit on iPhone?
+Our Recommendation
Apple-only contacts? FaceTime. Best call quality on any platform. Already on your iPhone.
Mixed Apple + Android? WhatsApp. 3B+ users, works everywhere, encrypted.
Need a free phone number? TextNow with free eSIM — the only truly free phone plan on iPhone.
Maximum privacy? Signal — zero metadata, non-profit, 4.8★ on App Store.
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