Best 4 assistant apps for android like cortana and siri

In windows phone cortana is the assistant .In apple siri is the assistant. But in android google now is not like an assistant only used to  search on the web. So I post  this third party app helps you to act as an assistant in your android device. By using this apps you can ask questions then get answers. also use driving mode,  conversation mode and can be  set to read incoming messages.  Click the below link  to download the assistant apps you like.

 
1. Indigo 

            1. Can ask questions

            2. Open Apllication by ask "open [App name]"

            3. Conversation Mode

            4. Check weather               

                         DOWNLOAD

    
2. Skyvi

             1. Can ask questions

            2. Open Apllication by ask "open [App name]"

            3. Conversation Mode

             

            4.Song next play prev

                           [ DOWNLOAD]

3. Robin

                            1. Can ask questions

                            2. Open Apllication by ask "open [App name]"

                            3. Conversation Mode

                              

                             4.Can use at home page

                            [DOWNLOAD]

4. Assistant

             1. Can ask questions

            2. Open Apllication by ask "open [App name]"

            3. Conversation Mode

             4.Picture mode

                              [DOWNLOAD]