Splitwise makes it really easy to divvy up dinner bills, group trips, and date nights when you go Dutch.

What we love: How the app calculates who owes what—and keeps track of everyone’s payments and IOUs. Private groups make it easy to break down costs after vacations, events, or up-all-night outings. And its ability to scan receipts and convert foreign currencies takes the guesswork out of settling up.

Quick tip: Tap the Balances button to see payments you still need to make—and any payments (hopefully) coming your way.

Meet the creator: Chief technology officer Ryan Laughlin still uses Splitwise to track his everyday expenses with his wife. “Splitwise has the entire 13-year history of our relationship, from our first trip together to our monthly mortgage payment,” he says.