Katerina Stoilova
Zephyra AI Assistant
Concept Mobile App Design
End-to-End UX Case Study
An assistant that feels less like an app and more like a thoughtful companion
Zephyra is an intelligent AI assistant app designed to simplify daily tasks, enhance productivity and deliver contextual, proactive support.
{Research Phase}
User Interviews
A total of 11 users were interviewed for the purposes of this project.
Industry Analysis
The competitive analysis was conducted based on readily available research information for 4 other similar AI services: Siri, Google Assistant, Replika & ChatGPT.
Key Insights
We saw the opportunity to merge productivity with personality in a sleek, mobile-first design, and help users who are overwhelmed by multitasking but don’t trust assistants to “fully take over.”
{User Interviews}
79%
Lack of trust
Users are overwhelmed by multitasking but don’t trust assistants to “fully take over.”
99%
Privacy
They want control, customization, and trust in data usage.
85%
AI Voice
A default assistant voice or tone doesn’t resonate with everyone.
55%
Accessibility
Voice-only interaction feels limiting in public spaces.
{Industry Analysis}
Siri
Siri has the strength of the deep OS integration and a fully optimized mobile experience, but it’s relatively passive and lacks customization.
It’s only available for IOS.
Google Assistant
Strong contextual awareness and multi-device sync, but the user experience can feel transactional and cluttered.
Replika
Provides the user with a certain level of emotional connection through a conversational AI model. Less utility-focused, more social / emotional.
ChatGPT
Deep knowledge base, natural conversation, high flexibility. Not inherently proactive, lacks native OS and task integrations.
{Problem Definition}
Mechanical, impersonal, overly limited
Users find it hard to engage with AI platforms on a deeper level
Lack of personalization
Interactions feel one-size-fits-all, with little adaptability to user preferences, tone, or daily habits.
Personal data protection
Users often don’t trust assistants to help with meaningful tasks, or abandon them after basic use because of personal data protection concerns.
{Lean UX Canvas}
The one-page visual that helps us zero in on the most important aspects of the project.
{Design}
The welcome screen sets the tone for the user’s experience with Zephyra. It’s clean, minimal and designed to immediately convey the app’s purpose: a smart assistant that simplifies daily tasks.
Let's create something that matters!
If you're interested in collaborating on a project or discussing potential opportunities, I'd be happy to connect. Reach out and let’s explore how we can work together to create impactful solutions.