# Variance — The Quant Prep App

> Variance is an iOS app for quant interview preparation. It trains the skills quantitative trading firms and hedge funds test in interviews and online assessments — mental math, probability, logic, number sequences, pattern recognition, and reaction speed — with timed, adaptive drills. Free to download; a Total Access subscription unlocks all modules.

Site: https://www.thequantprepapp.com
App Store: https://apps.apple.com/app/apple-store/id6760629839?pt=128663074&ct=quant%20prep%20app%20website&mt=8
Support: support@thequantprepapp.com

## Key pages

- [Home](https://www.thequantprepapp.com): Product overview with a live playable mental math drill.
- [Pricing](https://www.thequantprepapp.com/pricing): Guest vs Free vs Total Access feature comparison.
- [About](https://www.thequantprepapp.com/about): Who Variance is built for and why.
- [Support](https://www.thequantprepapp.com/support): Help and contact information.

## Guides

- [How to Prepare for Quant Online Assessments](https://www.thequantprepapp.com/guides/how-to-prepare-for-quant-online-assessments): What quant OAs test, scoring, a two-week prep plan, and test-day execution.
- [Mental Math for Quant Interviews](https://www.thequantprepapp.com/guides/mental-math-for-quant-interviews): Techniques, target speeds, and a 4-week training plan.
- [Quant Interview Practice Questions](https://www.thequantprepapp.com/guides/quant-interview-questions): 14 realistic questions with worked answers across mental math, sequences, probability, and logic.
- [What Quant Firms Test](https://www.thequantprepapp.com/guides/what-quant-firms-test): How market makers, prop firms, and hedge funds weight speed vs. depth in screening.

## Facts

- Platform: iOS only (iPhone). No Android or web app.
- Price: free to download with optional Total Access subscription.
- Training modules: mental math, number sequences, pattern recognition, probability and logic, reaction time, timed online-assessment mode.
- Developer: 1P410 Technologies.