Next thing we want to compare is the message delivery notification system used by the two IM services.
BBM has four indication levels to convey the status of a message. The four way notification system indicates the following:
Three signal bars: Message is being sent.
Tick Mark: Message is successfully sent to the server.
D: Message has been delivered to the receiver.
R: Message has been read by the receiver.
WhatsApp on the other hand only has three indication levels:
Timer symbol: Message is being sent.
Single Tick Mark: Message is successfully sent to the server.
Double Tick Mark: Message has been delivered to the receiver.
Note that WhatsApp doesn’t notify whether a particular message is actually read by the receiver whereas BBM actually does. BBM clearly takes the upper hand here.
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