Cosum: Split Expenses is a productivity app designed for Android that simplifies expense management among groups. It allows users to easily track shared expenses without requiring all participants to install the app. By simply adding names, one person can manage the expenses for the group, while others can view their individual balances through an invite link. This feature enhances accessibility and convenience, making it ideal for trips, shared living situations, or group dinners.

The app streamlines the process of recording expenses, allowing users to input data quickly with default settings filled in. It provides a clear overview of financial obligations in plain language, eliminating the need for complicated spreadsheets. Cosum automatically simplifies multiple debts into fewer transfers and can function offline for added usability. The free version supports basic features, with a premium option available for larger groups and additional functionality, making it a versatile choice for anyone needing to manage shared finances.