Mobile App Product Design by Hillary NMobile App Product Design by Hillary N
Mobile App Product DesignHillary N
Cover image for Mobile App Product Design
I design mobile apps that are built to ship, not just to present. Every screen is thought through, every edge case is covered, and everything is handed off in a way your developers can actually work from.
My background is in health tech, where the stakes of getting design wrong are higher than most. I led design across three platforms for U by Prodia, Indonesia's largest clinical laboratory, serving over one million users. I also designed the Biological Age feature for Elfie, a global health app available in 35 countries, validated through a Maze usability test with 84 testers, scoring 8.3 out of 10 overall and 7.8 out of 10 for motivation to change behaviour.
What makes my work different: I design with developers in mind. Components are structured for reuse, states are complete, and the design system is built to scale, not to impress in a portfolio review.
Phase I: Discovery and Alignment We align on your product, users, goals, and constraints before anything is designed. I ask the questions that surface what your users actually need versus what was assumed. No guesswork, no designing in the dark.
Phase II: Information Architecture and Wireframes Structure, flows, and hierarchy defined before a single pixel is polished. This is where friction gets eliminated before it gets built in. You see exactly how the product works and we agree on it before moving forward.
Phase III: Visual Direction Visual language established. If your brand needs foundational work, we build the essential elements here, typography, colour, and tone, to keep momentum without a full brand project.
Phase IV: High-Fidelity Design Every screen designed to production standard. All states covered: empty, loading, error, success, not just the happy path. This is where clarity, quality, and consistency come together.
Phase V: Design System and Handoff Component library, colour tokens, spacing rules, and documentation. Your developers ship faster and your product stays consistent as it grows. Everything is yours.
What you get:
Figma files for all screens and states
Full design system and component library
Developer handoff-ready documentation
FAQs

Example work
Designing a science-backed Biological Age feature
Leading UX design for Indonesia's largest clinical lab
Starting at$4,000
Duration4 weeks
Tags
Android
Figma
iOS
Mobile Designer
UI Designer
UX Designer
Service provided by
Hillary N Batam, Indonesia
Mobile App Product DesignHillary N
Starting at$4,000
Duration4 weeks
Tags
Android
Figma
iOS
Mobile Designer
UI Designer
UX Designer
Cover image for Mobile App Product Design
I design mobile apps that are built to ship, not just to present. Every screen is thought through, every edge case is covered, and everything is handed off in a way your developers can actually work from.
My background is in health tech, where the stakes of getting design wrong are higher than most. I led design across three platforms for U by Prodia, Indonesia's largest clinical laboratory, serving over one million users. I also designed the Biological Age feature for Elfie, a global health app available in 35 countries, validated through a Maze usability test with 84 testers, scoring 8.3 out of 10 overall and 7.8 out of 10 for motivation to change behaviour.
What makes my work different: I design with developers in mind. Components are structured for reuse, states are complete, and the design system is built to scale, not to impress in a portfolio review.
Phase I: Discovery and Alignment We align on your product, users, goals, and constraints before anything is designed. I ask the questions that surface what your users actually need versus what was assumed. No guesswork, no designing in the dark.
Phase II: Information Architecture and Wireframes Structure, flows, and hierarchy defined before a single pixel is polished. This is where friction gets eliminated before it gets built in. You see exactly how the product works and we agree on it before moving forward.
Phase III: Visual Direction Visual language established. If your brand needs foundational work, we build the essential elements here, typography, colour, and tone, to keep momentum without a full brand project.
Phase IV: High-Fidelity Design Every screen designed to production standard. All states covered: empty, loading, error, success, not just the happy path. This is where clarity, quality, and consistency come together.
Phase V: Design System and Handoff Component library, colour tokens, spacing rules, and documentation. Your developers ship faster and your product stays consistent as it grows. Everything is yours.
What you get:
Figma files for all screens and states
Full design system and component library
Developer handoff-ready documentation
FAQs

Example work
Designing a science-backed Biological Age feature
Leading UX design for Indonesia's largest clinical lab
$4,000