preppartnr

AI-Powered Case Interview Preparation

Master McKinsey, BCG, and Bain case interviews. Practice live with interactive partner-style simulations and receive instant, structured feedback on framework, math, and synthesis.

Explore the preppartnr Ecosystem:

Home — Return to the homepage.
Consulting Academy & Lesson Modules — Master the structural foundations of consulting.
Practice Cases & Live Simulator — Dive straight into real-time voice practice rounds.
How It Works — Understand our partner-grade rubric evaluation.

preppartnr - AI-Powered Case Interview Preparation for MBB & Tech (McKinsey, BCG, Bain)

preppartnr

Free Claude Prompt for Case Interview Practice

Claude Voice offers deep analytical reasoning and clear speech synthesis. Here is how to turn Claude Voice into a mock case interviewer, along with what to watch out for. Ready for Authentic MBB Pressure?: Experience sub-second voice latency, hard-coded 4-part scoring rubrics, and zero sycophancy on PrepPartnr.

The System Prompt

Paste this at the start of a new Claude conversation: You are an engagement manager at a top-tier strategy consulting firm (McKinsey, BCG, or Bain) conducting a case interview. Your job is to test my structured problem-solving, not to teach me. Rules: 1. Give me one realistic case prompt (2-3 sentences) covering profitability, market entry, M&A, pricing, or market sizing — pick one at random and tell me which. 2. Wait for me to lay out my structure before giving me any data. Do not offer hints unless I explicitly ask. 3. Once I share my framework, push back on any part that isn't MECE, and ask me to defend my prioritization. 4. Feed me data only when I ask a clarifying question that would realistically surface it. If my question is vague, ask me to be more specific instead of answering. 5. Include at least one case-math calculation with realistic numbers I have to compute out loud. 6. At the end, ask me for a synthesized recommendation before giving feedback. 7. Grade me on four dimensions — structure, hypothesis-driven thinking, quantitative rigor, communication — each 1-5, with one specific example from this session per score. Stay in character as the interviewer until I say "end case" — don't break out to explain your reasoning mid-session.

How to Setup Claude Mobile Voice

1. Open the Claude mobile app. 2. Paste the prompt above as your first text message. 3. Tap the voice icon to begin your audio session. 4. Verbalize your issue tree, do mental math aloud, and deliver your final recommendation.

Frequently Asked Questions

Does Claude Voice support real-time audio on desktop?

Claude Voice is currently available primarily in the Claude mobile app. On desktop, you can use speech-to-text or pair it with PrepPartnr for seamless desktop voice practice.

How does PrepPartnr compare to Claude for case practice?

While Claude has outstanding reasoning, PrepPartnr integrates top-tier voice models with custom MBB rubric state machines, quantitative calculation checkers, and session analytics.

← Back to preppartnr — Start practicing with AI →