Easy, professional, and ready to use.
Kantan Seikyu is an all-in-one invoicing app that anyone can use to create beautiful business documents with ease.
Whether you’re a freelancer, small business owner, or side-business operator, you can create professional invoices, quotations, receipts, purchase orders, and delivery notes within minutes — no registration required.
Key Features
Create and manage quotations, invoices, receipts, purchase orders, and delivery notes.
Multi-language and multi-currency support for international business.
Fully compliant with Japan’s Qualified Invoice System (Invoice制度) and Electronic Bookkeeping Law.
NEW: Invoice report – instantly view statistics and export data.
NEW: Custom email templates for smooth client communication.
NEW: Keyboard shortcuts for faster desktop operations.
Manage multiple bank accounts and optimize transfer fees (supports international transfers).
Sync data securely via Google Drive or work fully offline.
No account or sign-up required — start using it immediately.
Ideal For
Freelancers and self-employed professionals.
Small businesses, startups, and international traders.
Users who need invoice compliance (Invoice制度対応).
Those managing side businesses (副業).
Entrepreneurs who value simplicity, privacy, and speed.
Ratings & Reviews
This app has not received enough ratings or reviews to display an overview.
support for eu and qrcode
Version 1.10.0
The developer, 瑜 邹, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary based, for example, on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
