SubTotal: Invoice Maker is a free iPhone application developed by Timo Partl, designed for small business owners to efficiently generate PDF invoices. This tool offers seamless integration across various platforms, including Cloud Sync with OneDrive, Google Drive, Dropbox, iCloud, and WebDAV. Users can effortlessly create professional PDF invoices, quotes, or estimates and promptly send them to clients. Additionally, SubTotal allows for the creation of invoices from WorkingHours data with a single click, simplifying the invoicing process.

Moreover, users can easily monitor the status of invoices, marking them as paid upon receiving payment. The application provides a selection of beautiful PDF templates for users to personalize their invoices with company logos, colors, and fonts. Notably, SubTotal ensures a straightforward invoicing experience without any advertisements, subscriptions, or sign-ups.