Support & FAQ
Everything you need to get started and get better.
Getting Started
Do I need to create an account?
No. QuantRival works completely offline with no account required. Just download, open, and start practicing.
What's the best way to start?
Start with Brain Teasers to assess your baseline, then add 10 minutes of Mental Math Blitz daily. Once you're comfortable, add The Deck for market making practice.
Subscriptions & Billing
How do I cancel my subscription?
Open Settings on your iPhone → Apple ID → Subscriptions → QuantRival → Cancel. You keep Pro access until the end of the current billing period. Lifetime is a one-time purchase, so there is nothing to cancel.
How do I restore my purchase on a new device?
Open QuantRival → Settings → Subscription → Restore Purchases. Make sure you're signed in with the same Apple ID.
Is the Lifetime plan really lifetime?
Yes — a single $199.99 purchase unlocks all Pro features forever, including all future updates. No subscription and no renewals.
Games & Content
Where do the brain teasers come from?
Our 200 brain teasers are original problems written for QuantRival, covering the concepts that come up in quant trading interviews: probability, expected value, combinatorics, game theory and options intuition.
How often is new content added?
We add new brain teasers and games in app updates. Pro and Lifetime users get all new content as soon as it ships.
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