Postman

Postman is a free messaging app that makes communications cheap, quick, fun and easy. You can easily chat with anyone for free even if the person does not have the app or even internet connection. You can also send messages with custom sender id which is available at very cheap price, this feature is good for bulk sms advertising and campaigns. These custom messages can be scheduled and sent to bulk contacts. The app also works as a text messaging app and easily synchronizes your chats and text messages so you can do all your messaging in one app and read all messages together with easy search feature and spam blocker to block unwanted messages. It’s been designed from the bottom up with the newest Android guidelines in mind to look beautiful and just plain work. Feel completely immersed in the app with a design that flows freely between, you, all your friends, and Android.
Main features:
- Send message to anyone, anywhere free of charge
- Send and manage phone text messages easily.
- Read all messages in one place: sms, chat, mms etc
- Real time message stat and notification: if message has delivered or read
- Send customized bulk sms at cheap rates to any number.
- Easily add numbers to send custom sms to from contacts, file or simply type them.
- Messages are sent at one unit per message to any network, no hidden charge.
- See numbers that received your bulk sms and those that failed.
- Easily schedule and managed customized sms.
- Easily buy credit with various payment method: ATM card, Google wallet or bank payment.
- Full multimedia support including sending pictures, videos, audio, contacts, and GIFs
- Fully customizable notifications
- Full emoji support (850+ emojis, Android or iOS 7 style)
- Personalized mass messages
- Easily filter of spam messages and mute contacts
N.B - If you use android version less than kitkat you have to turn of notification in other sms app to avoid double notifications