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08/19/2025

Added 'Invoice Creation' Feature to Income Calculator Web App

We have added a new feature to the Income Calculator web app that allows sole proprietors and corporations to easily create professional invoices.

We have added a new 'Invoice Creation' feature to our Income Calculator web app (https://tedorikeisan.com). This feature enables sole proprietors and corporations to easily create professional invoices.


Invoice Creation Features:

•Intuitive operation for easy invoice creation
•Registration and management of company and client information
•Detailed input for product and service items
•Automatic consumption tax calculation
•PDF format output and download
•Template customization functionality
•Automatic invoice numbering
•Invoice history management

With this feature, we can now provide comprehensive support for sole proprietors' business efficiency, combining income calculation with invoice management. From invoice creation to income management, everything can be completed on one platform.


The Income Calculator web app continues to be available free of charge. Mobile app versions are also available on App Store and Google Play.