Yahoo has introduced Hub which a messaging app for Android that allows you to send text messages and have group conversations for free. Hub allows you to add participants to any conversation thread and you can switch from private messaging to a group conversation.
Basically the app works like Whatsapp, there is no text messaging fees as messages are sent over Wi-Fi or using your data connection. You can communicate with anyone through Hub on any mobile device as long as you have their mobile phone numbers.
Key features of Hub include:
- Group Messaging: Enjoy group conversations with several friends at once
- Local and international SMS messages: Send text messages to other Hub users or any mobile phone for free
- Privacy: Easily view and add participants to any conversation thread
- Message any phone: Your friends can reply with any SMS enabled mobile phone
- Instant notifications: Get push notifications for incoming messages so you never have to miss a conversation
Hub is currently in beta and is available for download for Android, and will probably be launched on iOS as well.