Split costs, not friendships

Track shared expenses with friends, family, or colleagues. See who owes whom and settle up with one click.

  • Create groups for trips, flatmates, events, and more
  • Log shared expenses with one tap
  • See who owes whom at a glance
  • Settle debts and track payments
  • Works on any device — no app install needed
  • Sign in once for both Cost Split and DevInbox