Oosh is a financial and social app designed to make sharing costs simpler. It helps people track shared expenses, see clearly who owes whom across friends, groups and payment requests, and settle balances without exchanging bank details. Users can add friends, invite others through a link and manage expenses in one place, with flexible options for splitting costs. There is no stated daily limit on adding, editing or removing group expenses.

Oosh supports payments through linked UK bank accounts, using open banking to send money directly between accounts. Users can link multiple banks and request or send money through the app. For people who do not use Oosh, PayMe links and external payment requests can be shared through messaging services, with payment progress tracked in the app. Automatic reminders help prompt people who owe money, while QR codes offer another way to pay. The app also supports expenses in different currencies, converting balances to GBP using real-time rates.