when should i consider my period over?

i’m having trouble understanding my period duration days because i don’t know when i should consider it over. i have a light to moderate period, usually with 2 days of moderate flow then on the third day i wake up with a brown blood pad and its light throughout the day. day 4 & 5 are incredibly light brown blood spotting that sometimes is only visible on a tissue, and there’s no need for me to wear a pad (most of the times).

so my question is what is my period duration is it 5 days? 3 days? i don’t know how to log it on my period app, because i don’t know if i should consider those last 2 days as apart of my period due to them being very light.