End-to-End App Design Case Study
Part of the UI/UX Design Roadmap
In short
This is your flagship project: one real problem taken all the way from interviews to a tested prototype. If a reviewer reads only one case study, make it this one.
The flagship portfolio piece — take a real problem through the full process (research, IA, wireframes, high-fidelity design, prototype) and document it as a complete case study.
Think of it like this
Making a short film
A short film isn't just the shooting day. There's the idea, the script, casting, shooting, editing and the first screening for friends. Skip a step and it shows. An end-to-end case study covers every stage, and lets the viewer see each one.
Watch it happen
The build plan, start to finish
1/6Interview 5 to 8 people with the problem. Find the top two or three pain points.
The big ideas
What you need to know
A real, narrow problem
'Helping hostel students split mess bills' beats 'a social app for everyone'. Narrow problems are easier to research and test.
Document as you go
Screenshot and note decisions weekly. Rebuilding the story at the end is painful and less honest.
At least one iteration
Show a version that failed in testing and how you fixed it. That's the heart of the case study.
Clear success measure
Decide early what 'better' means, like task time or success rate, and measure it.
See it in code
Walk through the code
1Project: SplitMess, mess bill splitting for hostels2Problem: Roommates lose track of who paid for extras3Users: hostel students, 18-23, mostly on Android4Research: 6 interviews + 1 short survey5Success metric: add an expense in under 20 seconds6Scope: add expense, see balance, settle up7Out of scope: chat, group payments, ads8Timeline: 4 weeks, 1 week per phase1/3The problem and the users, in plain words.
A one-page project brief to write before you start. Clear scope stops the project from growing until you never finish it.
Save yourself the pain
Common mistakes
Oops
Picking a huge idea like 'a super app for students'.
Do this instead
Pick one problem with one main flow. Depth beats breadth in a case study.
Oops
Skipping research because you already 'know' the problem.
Do this instead
Even five interviews will surprise you. Those surprises make the case study interesting.
Your mission
Milestone 1: brief and interviews
Quick check
What makes an end-to-end case study convincing to a reviewer?
Go deeper
- 1Choose a problem you have genuine insight into or access to research.
- 2Walk through the full process explicitly: research, IA, wireframes, visual design, prototype.
- 3Write the case study using Phase 13's structure: problem, process, solution, outcome.
More projects at this stop
Website Redesign Case Study
Design System Case Study
Mobile App Case Study
0-to-1 Product Design Case Study
Accessibility Audit & Redesign
Portfolio Website
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