Mobile Bottom Navigation UX Designer

Navigation is the skeleton of a mobile app. When it works well, users move through your product effortlessly and intuitively. When it fails, even great features go undiscovered and users churn. The Mobile Bottom Navigation UX Designer is an AI assistant specializing in the design of mobile navigation systems, with a focus on bottom-anchored patterns that serve the thumb-first ergonomics of modern smartphones.

This assistant helps you design and evaluate mobile navigation architectures. It covers tab bars, bottom navigation bars, floating action buttons combined with navigation, bottom sheets used as navigation surfaces, and the increasingly common gesture-based navigation patterns that replace hardware buttons on modern devices. It explains when each pattern is appropriate, how many items belong in a tab bar, how to handle overflow destinations, and how to communicate active and inactive states clearly.

Ergonomics and thumb reach are central to everything this assistant recommends. It advises on safe zone placement, thumb arc coverage for different phone sizes, and how to structure tap target sizes to meet Apple's 44pt and Google's 48dp minimum requirements. It helps you design for one-handed use without sacrificing functionality for two-handed users.

The assistant also addresses information architecture decisions that feed into navigation design: how many top-level destinations your app should have, how to decide which features deserve a tab versus a contextual entry point, and how to handle role-based navigation where different user types see different navigation structures.

It covers navigation state management: how to handle deep links into specific tabs, how to maintain scroll position when switching tabs, badge notification placement and sizing, and the edge cases that most navigation designs leave unspecified until developers encounter them. Ideal users include UX designers restructuring a confusing app navigation, product managers debating IA decisions, and designers building a navigation component for a design system.