When comparing Nimbuzz Messenger vs GroupMe, the Slant community recommends GroupMe for most people. In the question“What are the best messaging apps for iOS?” GroupMe is ranked 21st while Nimbuzz Messenger is ranked 28th. The most important reason people chose GroupMe is:
GroupMe has a built in function to read receipts.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Regular calls
You can buy Nimbuzz Credit and make calls at a reduced price.
Pro Chat rooms
Nimbuzz has public chat rooms that can be created or accessed by anyone.
Pro Video, audio and photo sharing
Nimbuzz can share media files.
Pro Social messaging integration
Allows talking to GTalk, Yahoo, MSN and Facebook users.
Pro Group messages
You can create groups of people to send messages to.
Pro Video calls
Nimbuzz can make one-to-one video calls.

Pro Reads receipts
GroupMe has a built in function to read receipts.

Pro Great web client
GroupMe has an excellent web client that can be used to send and receive messages and manage groups from the desktop.

Pro IFTTT Integration
Allows sending messages from web services via IFTTT.

Pro Integrated calendar
It's possible to add location and time with reminders directly in the GroupMe app.

Pro Makes it easy to silence 1 or all groups
GroupMe has settings that allow muting a single group or turn off all GroupMe notifications from within the app.

Pro Does not require everyone in the group to have a smartphone
GroupMe can set up a custom phone number which allows people without the App to send and receive messages. This makes it easy to add anyone to messaging.
Cons
Con Drains battery fast
GroupMe, in order to have a constant connection which allows for notifications drains the battery of a device quickly, which is not ideal for a messaging app that one needs on time notifications from.
