There are several ways that a loved one can check in each day:

Respond to the daily Call
Loved one is called by Iamfine  and they respond by pressing "1" on their telephone keypad, then hang up.

Call in to Iamfine

Loved one dials in to the Iamfine number (From the USA: (731) 506 1000  From the UK: 01887 451000) from their registered phone. Waits for the system to recognize the caller ID. It will then say "thank you for checking in" and you can then hang up.

Send an SMS/Text message to Iamfine

Loved one sends and SMS/text message with the word "OK" to the Iamfine checkin number (see above) from their registered phone.

Via the website

Loved one logs into the website and is immediately checked in for the day.