Calculator for app development cost estimation focusing on Voice User Interface (VUI) Designers in Canada, the US, and Japan for creating Voice-Activated Assistant Skill applications (e.g., custom skills for Amazon Alexa or actions for Google Assistant). Designing intuitive and effective voice interactions requires specialized skills beyond traditional GUI design. VUI designers in Canada (e.g., Toronto, Montreal), the US (e.g., Seattle, Bay Area), and Japan (Tokyo) who understand conversational patterns and platform-specific guidelines are key. The main cost drivers include defining user intents and sample utterances, designing conversation flows and dialogue management strategies, handling errors and ambiguous inputs gracefully, and crafting the persona and tone of the voice skill. The calculator will consider the complexity of the skill's functionality, integration with backend APIs to fetch information or perform actions, and the need for multi-turn conversations. Thorough testing of voice interactions across different accents and phrasings is crucial. Ongoing costs may involve refining VUI based on user feedback, adding new intents and features, and updating the skill for changes in Alexa or Google Assistant platforms.