Contas a Pagar: Shared Expense Finance App Design
Vinicius Soares
Contas a Pagar is a personal finance mobile app built around one real problem: splitting household bills with the people you live with.
The challenge: most finance apps treat money as individual, but rent, power and internet are shared. People end up tracking who owes what in spreadsheets and group chats.
What I did: user research, user flows, a design system and high fidelity UI for iOS and Android. The key feature is "Agregados": connect the people you live with, split a bill in one tap and see what each person pays.
The result is a clean dashboard with the month's balance, upcoming bills, goals and shared expenses, designed to make paying on time effortless.
Role: UX/UI designer (research, flows, design system, UI). Built during a UX mentorship program.
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Posted Oct 29, 2026
Designed a personal finance app for splitting shared household bills.
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