In-call alert

[guigonca]

Help me please I'm desperate looking for an app that let me setup an alert every certain period of time for example 5 minutes during a call.
That's because my first 5 minutes of a call are free.
If I make a call of 6 minutes duration I'm billed with all 6 minutes eventhough my first 5 minutes are free so I need it to warn me when I'm close to 5 minutes

[pluto459]

sorry, cant help with that issue, but makes me think of the olden days when phones used to come with 60 mins free a month and all phones had a setting to beep at 50 seconds so you could end the call b4 the min happened.

Yes, im old lol