Picture Ngozi, the admissions lead at a private tutorial college in Lagos, with five counsellors calling parents who filled in an enquiry form. In admission season each counsellor makes about 80 calls a day, so the desk holds roughly 400 conversations.
Before the app, remarks went into exercise books and were typed into a shared sheet after the desk closed, when perhaps half of them made it. With the after-call sheet, each counsellor files the outcome in the seconds after hanging up, so all 400 are on record by evening.
Ngozi notices the difference first at the callback. When a parent rings back three days later, the counsellor who answers already sees "wants weekend classes, asked about fees" on the incoming screen and does not ask the parent to start from the beginning.
A worked illustration with round numbers, not a customer record.