Invoice Maker is an application designed to facilitate the creation and exchange of invoices with a variety of convenient features. Users can create invoices and estimates easily from various locations, whether they are with a client, working between projects, or at home. The app allows invoices to be generated automatically from estimates with minimal interaction, using customizable templates. Regularly used items, clients, and settings can be saved for quicker invoicing in the future. Client information can be efficiently set up using contacts from the user’s phone. Receipts can be generated using a pre-built template, with options to apply taxes either per item or on the total amount, and to choose whether they are inclusive or exclusive of tax. The invoices and estimates can be delivered via multiple channels such as email, text, printed document, or PDF format. Additional features include the ability to add custom notes, receive onboarding support, and manage push notifications. The user base is experiencing organic growth, primarily from regions like the USA, Canada, Australia, Great Britain, France, and Germany, with the main revenue model relying on subscriptions. The app is integrated with a comprehensive analytics system to track user data and subscriptions effectively. Despite not utilizing promotional tools, the app's customer acquisition has been successful due to effective App Store Optimization (ASO). Support for the app's full code base is available to new owners to facilitate understanding and management of processes, along with a strategy for future development.