If you read the article then it's clear they don't just use a .txt file, but also a calendar.
So maybe there's an app that combines the two?
My OBTF (one big text file) is in org syntax. I can attach timestamps to items and have them show up in an agenda view for the week or day.
My OBTF (one big text file) is in org syntax. I can attach timestamps to items and have them show up in an agenda view for the week or day.