* New user  LIMITED offers *: Get  500 credits after registration! 
DuoVoice is a free calling app that offers full  Free International calling  and quality of phone call locally and abroad. Use this Wifi calling app and enjoy FREE calls worldwide with any real phone number without worrying about expensive bills! Call for free and get in touch with people around the world! 
(1)  100% FREE international phone call  more than 230+ countries or regions.
(2)  New user bonus +500 credits  Multiple ways to earn app credits to make FREE phone calls. (watch videos, complete work, invite friends and more.) 
(3) Duo Voice uses an Internet call (aka WiFi call, IP call, or VoIP call). Call your friends WHERE you are  while you are under WiFi, 3G, 4G or 5G .
(4)  Server worldwide  to ensure the best voice quality. 
(5) Unlike international calling cards,  Duo Voice does not use your cell minutes . 
You can call your loved ones without worrying about expensive bills. Download VOIP Wi-Fi calling online app and enjoy FREE calls worldwide around any mobile and landline! Call any cell phone, local or overseas today! 
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 WHY USE DUO VOICE: 
 Free International Calling 
Duo Voice is a 100% Completely FREE international phone call app with no extra charge at all! Duo Voice can reach any mobile or landline number in more than 230+ countries or regions! If you want to make FREE calls to India,  either FREE or at low cost. 
 Clear & Stable Calling 
Duo Voice uses real telephone lines, which means we can guarantee a good crystal clear voice call quality, such as telephone calls from a landline! Duo Voice automatically detects and adjusts your connection speed to make sure more stable calls. 
 Earn credit  
There are millions of ways to earn credits in our app, for example: daily check-in, friends invitations, watching ads, etc. To enjoy the best service calling for FREE, simplest just need a tap to earn FREE credits. 
 High Quality Voice Call  
Voice calls are sent to high quality Duo Voice's dedicated VOIP network so that you do not need to worry about bad reception, volatile calls or drops. Our system always finds the best telephone line (the best voice quality) in your neighboring region when you make the call.
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Duo Voice - Connecting you to your international friends and family anywhere. Start your FREE or low cost or cheap calls today. Enjoy FREE Wi-Fi calls!

Don't forget to rate us a 5-Star(★ ★ ★ ★ ★), if you like us. 
Don't forget to share it with your friends, if you would like to help us. 
If you have any suggestions, please feel free to contact us via:

Email: [email protected]
Facebook: @duovoiceapp

Thank you for choosing Duo Voice. This update includes:
Fix login failure issue.