Whatsapp - Broadcast to multiple groups - repost

We need a way to send a single message in Whatsapp to multiple groups (i.e. the same functionality as broadcasting but instead of just sending to different individuals, it must send to multiple groups). This should preferably work for Android anf iPhone. Each group will contain up to 30 members. We will need to send 5-50 messages to the groups each day. If you are able to do this please email us back with a quote as well a system spec of the approach you plan on taking. Specifications: -------------------- Members of our team will set up multiple normal Whatsapp groups. They will be sending the same regular updates to each group. The reason we need this tool is to get to many groups as possible with the latest updates and without sending the update indvidually. All members of the groups were asked to get these updates. The groups we will need to send messages to are groups which we are members in but but we did not create these groups. We need a simple interface to send new messages. You will be working for developers, so please be technical in describing your bid.