Built by Students
We stressed over Casper and MMI just like you. Then we built the prep tool we wished existed.
Affordable Pricing
Representative Content
Instant Feedback
So we built Sandbox
OurMission
Give every applicant access to the prep they deserve — regardless of background or budget.
The Problem
- Private coaching costs $2,000–$10,000
- Online tools are fragmented & incomplete
- Most platforms lack real feedback
Sandbox Prep
- AI-powered feedback in seconds
- Only peer feedback system in the space
- Starting at just $29.99
50+
Medical Schools
200+
Casper Programs
All
MMI Station Types
Our principles
Smart preparation that works
Structured, data-driven practice with instant AI feedback. Track your progress across every competency and see exactly where to improve.
Learn together, grow faster
Get expert AI insights in seconds, plus peer feedback from real people. Our unique collaboration system helps you learn from others preparing for the same journey.
Affordable for everyone
Quality prep should be accessible to all students — not just those who can afford private coaching. Fair pricing means everyone gets a fair shot.
Key
AI-Powered Analysis
Powered by Sandbox Intelligence
Our AI analyzes every response across 6 competency dimensions and delivers feedback in seconds—not days.
Expert-curated scenarios
Trained on real responses
6 competency dimensions
50+ schools covered
Empathy
Communication
Ethics
Critical Thinking
Professionalism
Collaboration