30 games for mental math, probability and market making. Train daily before the real thing. QuantRival is coming to iPhone. Join the waitlist and we'll email you the day it's out.

The Deck · current iOS build
Quant trading interviews reward speed and precision under pressure. QuantRival turns that into 30 short, timed games you can run on your commute.
Make markets. Beat the clock.
Quote a bid and offer on a 52-card deck as cards are revealed. Your FV moves, your spread has to keep up, and your P&L shows the result.
80 problems. 8 minutes.
Arithmetic drills at the pace of a timed speed test. Accuracy and speed tracked every session.
Interview-style problems. On your commute.
Probability and logic problems with worked solutions. Spaced repetition brings back the ones you miss.
Track your edge. See your P&L.
Accuracy trend, P&L history and sessions by game, stored on your device.






One field. No account, no password.
QuantRival is being prepared for release.
A download link the day it goes live.
There's no public date yet. Everyone on the waitlist gets an email when it's live.
Candidates preparing for quant trading interviews: market making rounds, mental math tests, probability and brain teasers.
Yes. QuantRival is a native iOS app for iPhone.
QuantRival will be free to download, with an optional paid subscription for the full game library. Final pricing will be shown before you buy anything.
We store it to email you about the QuantRival launch. We don't sell or share it. Details in the Privacy Policy.
One email when QuantRival is out on iPhone. Nothing else.