"I walked into the gym, feeling lost. The machines looked complicated, and I had no idea where to begin. With no plan, I just hopped on a treadmill, but it didn’t feel like progress. I left feeling defeated—ended up ordering junk food again. Another wasted workout, another frustrating day."


Mike C. - International Student, SFSU

"I walked into the gym, feeling lost. The machines looked complicated, and I had no idea where to begin. With no plan, I just hopped on a treadmill, but it didn’t feel like progress. I left feeling defeated—ended up ordering junk food again. Another wasted workout, another frustrating day."


Mike C. - International Student, SFSU

"I walked into the gym, feeling lost. The machines looked complicated, and I had no idea where to begin. With no plan, I just hopped on a treadmill, but it didn’t feel like progress. I left feeling defeated—ended up ordering junk food again. Another wasted workout, another frustrating day."


Mike C. - International Student, SFSU

"I walked into the gym, feeling lost. The machines looked complicated, and I had no idea where to begin. With no plan, I just hopped on a treadmill, but it didn’t feel like progress. I left feeling defeated—ended up ordering junk food again. Another wasted workout, another frustrating day."


Mike C. - International Student, SFSU

"I walked into the gym, feeling lost. The machines looked complicated, and I had no idea where to begin. With no plan, I just hopped on a treadmill, but it didn’t feel like progress. I left feeling defeated—ended up ordering junk food again. Another wasted workout, another frustrating day."


Mike C. - International Student, SFSU

VitruFit: AI Trainer, One Tap Away

VitruFit: AI Trainer, One Tap Away

VitruFit: AI Trainer, One Tap Away

What's VirtuFit?

The App Store is filled with fitness apps, yet many face a recurring issue: inconsistent results. Most workouts are pre-recorded and lack true personalization.


VirtuFit is a mobile app that redefines fitness with an AI trainer, offering personalized guidance, professional support, and consistent results to help users achieve their goals.

Client

VirtuFit

DELIVERABLES

Mobile App

Design System

UX Research

Visual Design

Year

2024

Role

Lead Visual Designer

Lead Product Designer

Product manager
(freelance)

Context

The fitness app market is overflowing — Health Works Collective reports there are more than 97,000 apps competing for users' attention. Whether it’s virtual trainers or live classes, each one claims to have the secret to better results. But with so many options and performance stats, the experience can quickly become overwhelming. Most fitness apps create workout and meal plans based on generic metrics like BMI or preset body types, which often leaves users without guidance that's truly tailored to their individual goals and lifestyle.


VirtuFit's team aims to develop a user-centric application that emphasizes customization and real-time responsiveness through AI technology. As the visual/product design lead and one of the product managers, I was expected to improve the overall user experience, refine the design system and redesign the interfaces.

My Roles

Improved VitruFit’s core user flows, restructured the app’s information architecture, and enhanced interface consistency and scalability by building out a unified design system.

Led end-to-end design efforts — from identifying user pain points and defining problem areas to prioritizing features, designing solutions, running usability tests, and collaborating with the team through implementation.

Target Users

At VitruFit, we typically use usertesting.com for research, but I secured approval to conduct in-person interviews for deeper insights. I visited gyms using free trials, speaking with members to understand their pain points and experiences with fitness apps.

Key Takeaways

Lack of personalization

Poor exercise demos

Inflexible workout adjustments

Delayed responses

Key Takeaways

Lack of personalization

Poor exercise demos

Inflexible workout adjustments

Delayed responses

Solution 1

Individual Body Assessment


Smart Fitness Onboarding


VitruFit streamlines the onboarding process by allowing users to input key details about their body composition, fitness level, and personal goals. Using this data, the AI intelligently analyzes individual needs and generates customized workout and nutrition plans tailored to each user.



AI-Powered Guidance


Beyond plan creation, this information serves as a foundational profile for the AI trainer, enabling it to provide context-aware guidance. When users seek advice on their physical condition, exercise techniques, progress tracking, or weight management strategies, the AI leverages their initial assessment to deliver more relevant and personalized responses.

Solution 2

Adjust Workout + Demo


Workout Plan Adjustment


VitruFit streamlines the onboarding process by allowing users to input key details about their body composition, fitness level, and personal goals. Using this data, the AI intelligently analyzes individual needs and generates customized workout and nutrition plans tailored to each user.



Real Time Demo


Beyond plan creation, this information serves as a foundational profile for the AI trainer, enabling it to provide context-aware guidance. When users seek advice on their physical condition, exercise techniques, progress tracking, or weight management strategies, the AI leverages their initial assessment to deliver more relevant and personalized responses.

Solution 3

AI Trainer 24/7


Personalized Workout & Nutrition Planning


Introduce to our AI trainer: Coach Vitru, who can tailor workout and diet plans based on each user’s body condition, fitness level, and exercise habits. Using AI-driven insights, it generates customized training routines and diet recommendations that align with individual goals. Users can seamlessly access their personalized plans within the chat interface and start their workouts immediately.



24/7 Real-Time Coaching & Adjustments


Users can interact with Coach Vitru anytime for instant support during their workouts. Whether they need to modify an exercise, update their diet plan, or request an exercise demo, Coach Vitru provides real-time guidance on demand. With its always-available chat functionality, users receive expert-level adjustments and recommendations anytime, anywhere.

Dashboard Screen

Plan Selection


Workout + Diet Plan Selection


After signing up, users land on the dashboard, which serves as their home screen. Here, they can easily select their workout of the day, curated by the Vitru AI trainer. These recommendations are personalized based on each user’s health conditions and exercise history, ensuring a tailored fitness experience. Users can also access their customized diet plans directly from the dashboard to align their nutrition with their training goals.



Navigation with Quick-Access Menu


A blue circular button in the lower-left corner of the screen provides quick access to a navigation menu. This pop-up menu allows users to seamlessly switch between different screens, ensuring they can effortlessly explore workouts, meal plans, progress tracking, and other features—all within a few taps.

Visual Design Showcase

Scroll down to view more visual design images!

2025 ® CHUOFAN ZHENG

2025 ® CHUOFAN ZHENG

2025 ® CHUOFAN ZHENG

2025 ® CHUOFAN ZHENG

2025 ® CHUOFAN ZHENG