lvlUpSysDesign
System design mocks, graded
About
Practice system design interviews with timed, paper-based mock exams. Receive instant feedback and scores on your drawings, identifying key areas for improvement. Track your progress over time to build confidence for real interviews.
What's New in lvlUpSysDesign
1.0.1
September 16, 2026
Corrected app icon and small fixes.
Developer apps
FAQ
How does lvlUpSysDesign simulate a real system design interview?
lvlUpSysDesign simulates a real interview by providing a timed, paper-based mock exam. You work through the problem with a pen and paper, mirroring the actual interview environment without digital aids.
What kind of feedback does lvlUpSysDesign provide?
After you submit your drawing, lvlUpSysDesign provides a debrief with a score out of 100 across six dimensions. It highlights your biggest gap, explains the score for each design axis with evidence from your page, and suggests a drill for your next attempt.
Why is practicing on paper important for system design interviews?
Practicing on paper is crucial because real interviews use pen and page, without editors or autocomplete. This method helps you develop reflexes and problem-solving skills that translate directly to the pressure of a live interview.
How does lvlUpSysDesign help track progress?
Every attempt you make is saved and ordered chronologically with its score. This allows you to visually track your improvement over time, making your progress tangible rather than abstract.
What are the four steps of the system design ritual in lvlUpSysDesign?
The four steps are Framing (5 mins) to restate the problem and agree on scope, Estimates (10 mins) for key metrics, Design (15 mins) with boxes and arrows after numbers, and Parking lot (5 mins) for open questions.
What is the age rating for lvlUpSysDesign?
lvlUpSysDesign has an age rating of 4+ and is suitable for a wide range of users.
On which devices can I use lvlUpSysDesign?
Currently, lvlUpSysDesign is supported on iPhone devices.
Does lvlUpSysDesign have ads?
No, lvlUpSysDesign does not contain advertisements.