Secretly bail on plans, together.
Drop in your number and your friend's. If they do the same before midnight, you both get a text. If they don't, they'll never know.
How it works
1
You drop in both numbers. Nothing happens yet.
2
Your friend does the same — without you asking.
3
Both of you wanted out? You both get a text. Plans dead.
day-of only
numbers hashed
wiped at midnight