How many connections are used if a client is connected to a channel over a 24 hour period?

Each client connection to a given channel is only counted once during a 24 hour period. Note that a client switching to a different IP address during the respective sampling period (24 hours) will be counted as a new connection.

If your mobile devices frequently change IP addresses, you can switch to UUID billing but you must set a UUID for each device and reuse that UUID every time that device connects to PubNub for more accurate mobile enabled device counting. You must discuss this with your Customer Success Manager if you believe you need to change to UUID based billing.