Two designs. Can you spot which one is better?
Most design skills are taught through theory. SpotTheUI teaches through practice. Fast A/B challenges that train your eye to see what great designers see.
Try it! Which design has better Contrast?
Click on a design to see if you're right
challenges
principles
levels
Simple. Fast. Surprisingly addictive.
Each challenge takes about 30 seconds. Before you know it, you'll have trained your eye on dozens of real design decisions.
See Two Designs
Every challenge presents two UI mockups. Both look professional, but one follows the design principle better.
Spot the Better One
Trust your instinct. Tap the design you think is stronger. Easy at first, then deceptively tricky.
Learn Why
Get a clear, concise explanation of what makes the better design work. This is where real learning happens.
Not just another design course
No videos to watch. No articles to read. SpotTheUI is pure practice, the part most learning tools skip.
Spot the Difference
Two designs. One follows the principle, one doesn't. Train yourself to see what most people miss.
Instant Feedback
Every answer comes with a clear explanation of why one design works better, so the lesson sticks.
4 Difficulty Levels
Start with obvious differences. As you improve, the challenges get subtler. Just like real design work.
Track Your Growth
Earn XP, level up, and unlock badges. Watch your accuracy climb across all 12 design principles.
12 principles that separate good design from great
These aren't abstract theories. They're the specific skills that make interfaces feel intuitive, polished, and professional.
Contrast
Make important things stand out
Alignment
Create order and connection
Balance
Distribute visual weight evenly
Hierarchy
Guide the eye to what matters
White Space
Give elements room to breathe
Repetition
Build consistency through patterns
Proximity
Group related things together
Unity
Make it all feel connected
Rhythm
Create flow and movement
Typography
Choose and pair fonts with intent
Color Theory
Use color with purpose
Consistency
Build trust through uniformity
Built for anyone who wants better design taste
Whether you're just starting out or leveling up, a trained eye is the most valuable design skill you can build.
Design Students
Build the visual intuition that separates classroom knowledge from real-world skill.
Developers
Ship better-looking UIs without waiting for a designer. Learn what makes interfaces feel polished.
Self-Taught Designers
Fill the gaps in your knowledge with structured practice across every core design principle.
Junior Designers
Fast-track your growth. Build the trained eye that senior designers develop over years.
Start free. Unlock everything for $9.99
Try 60 challenges across all 12 principles, completely free, no credit card. Love it? Unlock all 480 challenges with a one-time payment. Yours forever.