Terms of use
Last updated: November 7, 2026
These terms cover your use of quant blitz, an interview-prep app made by Velori Labs Ltd, a company registered in England and Wales (company number 17529890) ("we", "us"). By using the app you agree to them. How we handle your data is in the privacy policy. Questions: lukazsdev@gmail.com.
The short version
- quant blitz is a learning tool. It can't promise you a job or an offer.
- The path and the speed drills are free. Premium is bought through the App Store or Google Play, and they handle billing, cancelling and refunds.
- Use it for your own prep; don't copy or resell the questions.
- Your rights under consumer law are never affected by these terms.
What quant blitz is
quant blitz teaches the topics asked in interviews for quant trading and quant developer roles, with questions, explanations and speed drills. We check the content carefully (code is compiled and run, answers are worked out and simulated), but it may still contain mistakes, and it isn't a complete guide to any firm's process. It isn't financial, investment or career advice, and using it doesn't guarantee an interview, an offer or a job. We're not affiliated with any employer. quant blitz is meant for people aged 16 and over.
Free and Premium
The learning path and the speed drills are free; lessons use hearts, which refill over time. Premium adds unlimited hearts, blitz mode, jumping to any section, full stats and the question bank. It's available as a yearly or monthly subscription, sometimes with a free trial, or as a one-time lifetime purchase. Prices are shown in the app before you buy.
- Purchases are made and billed by the App Store (Apple) or Google Play, under their terms, to the account you use there. We never see your payment details.
- Subscriptions renew automatically at the end of each period until you cancel. A free trial turns into a paid subscription when it ends unless you cancel before then. Cancel in your App Store account settings (at least 24 hours before the period ends) or in Google Play under Payments & subscriptions. You keep Premium until the end of the period you've paid for.
- Refunds are handled by Apple or Google under their refund policies. If you have trouble, email us and we'll help where we can.
- Premium belongs to your Apple or Google account. On a new device, use Restore purchases on the Premium screen or in Profile.
Your progress
Your progress is saved on your device and backed up anonymously, as described in the privacy policy. You can delete it at any time with Profile → Delete my data. An unused backup is deleted after the period stated in the privacy policy.
Fair use
quant blitz is for your own, personal prep. Please don't:
- copy, scrape, republish or sell the questions, explanations or other content;
- try to get around Premium, hearts or other limits, or misuse promo or offer codes; or
- reverse engineer the app or interfere with it, our servers or other people's use of it.
If you break these rules, we may stop providing the app or Premium to you.
Our content
The app, its questions, explanations and design belong to us or are used with permission. We give you a personal, non-transferable licence to use the app on devices you own or control, under these terms and the App Store or Google Play rules.
Changes to the app
We keep improving quant blitz, so lessons, questions and features change over time. We may change prices for future billing periods, as the App Store and Google Play allow, and they tell subscribers before a price goes up. If we ever stop offering the app, we'll say so in the app or on this site first.
Our responsibility
We provide quant blitz with reasonable care and skill, but we can't promise it will always be available, error-free or suited to your particular goals. As far as the law allows, we aren't responsible for indirect or unforeseeable losses, such as a missed opportunity or a lost offer, and our total responsibility to you is limited to what you paid for Premium in the 12 months before a claim. Nothing in these terms limits our responsibility for death or personal injury caused by our negligence, for fraud, or for anything else the law doesn't allow us to limit, and nothing affects your statutory rights as a consumer.
App Store and Google Play
If you got quant blitz from the App Store, Apple's Licensed Application End User License Agreement also applies. If you got it from Google Play, the Google Play Terms of Service apply to your purchases. Apple and Google aren't responsible for quant blitz or its content; we are.
Law
These terms are governed by the law of England and Wales, and the courts of England and Wales can hear disputes. If you live elsewhere in the UK or in the EU, you keep the protection of your local consumer law and can also bring a claim in your local courts.
Changes to these terms
If we change these terms, we'll update this page and the date at the top. For important changes, we'll also tell you in the app or in the app's release notes.
Contact
Velori Labs Ltd · lukazsdev@gmail.com