Banana Split works out who owes what in a group: trips, flatmates, couples, dinners. Its individual mode keeps only your share of each expense, so you see what the weekend cost you, not just the group total. Log an expense in seconds, split it equally, by amount, percentage or shares, or scan the receipt and assign each line. Balances update live and the app suggests the fewest transfers to settle up. No sign-up, works offline. Free on iPhone, iPad and Android.