"what did my wife just say to me 5 minutes ago?" is the most brilliant app idea I've seen (in recent memory.)
Incidentally, it was written by Jess Armstrong who later created "Succession".
https://web.archive.org/web/20140208000114/https://kaptureau...
EDIT: had to share promo video https://www.youtube.com/watch?v=arQoSSXKaSQ