The irumo app is a utility tool designed for iPhone users, particularly those subscribed to the irumo service. This application allows users to monitor their data usage and remaining capacity, providing detailed graphs for daily and monthly consumption over the past three months. Users can easily add more data directly within the app, and a widget feature enables quick access to current data status.

In addition to data management, the irumo app offers features for checking contract details and billing information. Users can view their current charges, breakdowns, and even modify their service plans. The app also supports checking d-point balances and receiving important notifications about promotions and updates via push notifications, ensuring users stay informed about relevant information.