ChatTime AT&T/Verizon Skype Calling Cards Viber
ChatTime AT&T/Verizon Skype Calling Cards Viber
Summary Save money yes no yes yes yes
Free calling between users without Wi-Fi or 3G1 yes no no no no
Call any phone2 yes yes yes no no
Call without Wi-Fi or 3G data service from anywhere3 yes yes no yes no
As easy to use as making a regular call4 yes yes no no no
High quality calls, everytime (cellular network based)5 yes yes no no no
Dial with any number format6 yes no no no no
Use iPhone contacts without manual import or editing yes yes yes no yes
Purchase credits In-App using your iTunes account yes no no no no
Request support In-App with a 24 hour response guarantee yes no no no no
Key Features Incoming calls do not interrupt an existing call7 yes yes no yes no
Destination time check8 yes no no no no
Edit numbers from the Dial-Pad9 yes no no no no
Speed dial and Favorites yes yes no yes yes
Display or hide your caller ID from the dial pad10 yes no no no no
No hidden fees and no monthly subscriptions11 yes yes no no yes

ChatTime is the only solution to offer FREE international calls between ChatTime users in 53 countries over the cellular network without requiring Wi-Fi or 3G data.
Calling cards are typically only useful to call a single country. Viber can only call other Viber users
Call from any country without looking for a Wi-Fi hotspot.
Calling cards are inconvenient to use and top-up, Wi-Fi apps require looking for a hotspot.
It is impossible to control the quality of Wi-Fi calls (ChatTime uses the cellular network). Calling cards are often poor in call quality.
ChatTime recognizes any prefix (011, 001, +, 00x, etc) and recognizes local vs international numbers - there is no need to reformat your contact numbers. Skype recognizes some prefixes but not all and does not recognize local numbers.
If you receive an incoming while using a Wi-Fi app then your call will be disconnected or placed on hold without warning. With ChatTime you can place your call on hold or merge calls.
Avoid calling someone in the middle of the night by easily checking the time at any destination you want to call.
Received a phone number in email or SMS but it's missing the country code? You can easily paste the number into ChatTime and edit it before dialing.
ChatTime let's you turn the display of your phone number ON or OFF for each call you place without having to dial any special codes like AT&T and Verizon.
Skype charges a $.079 connection fee (for USD accounts) for each international call. Calling cards often have connection fees, hang-up fees or play tricks like rounding calls in 3-5 minute increments. Line 2 requires a monthly subscription.