# quant blitz: interview prep — Trading & quant dev questions

> Trading & quant dev questions (iPhone/iPad app by Velori Labs Ltd.)

- Source: https://appshunter.io/ios/app/quant-blitz-interview-prep/id6820223409 (this page in markdown: same URL + `.md`)
- Developer: [Velori Labs Ltd](https://appshunter.io/developer/1895293469)
- Category: Education, Developer Tools
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 61 MB
- Languages: American English
- Released: 2026-10-19
- Data updated: 2026-11-06

## What is quant blitz?

Prep for quant interviews in a few minutes a day, for trading and quant developer roles.

quant blitz turns the questions trading firms ask into short multiple-choice lessons, with an explanation after every answer: over 1,400 questions, plus mental math speed drills. Pick your role, then work through a path that ramps up from the basics.

TRADING
• Mental math: timed speed drills with typed answers, Zetamac style, from quick sums to decimals, percentages and sequences. Plus test conditions: 80 problems in 8 minutes.
• Probability: counting, Bayes, expectation, variance and the classic distributions.
• Brainteasers: dice, cards and urns, waiting times and optimal stopping.
• Betting and games: expected value, Kelly sizing and game theory.
• Market making: quotes and spreads, making a market, adverse selection and trading games.
• Options: payoffs and put–call parity, pricing bounds, the Greeks and volatility.

DEV
• C++: core language, memory and object lifetime, templates, the STL, concurrency and memory ordering, operating systems, and low-latency performance.
• Python: the data model, data structures and their costs, functions and OOP, the GIL and concurrency, CPython internals, NumPy and pandas, and operating systems.

LEARN IN A WAY THAT STICKS
• Lessons of 8–10 questions that ramp up in difficulty
• Missed questions come back until you get them right, then return in spaced reviews
• Take the placement test to start at your level, or jump ahead with a checkpoint
• Streaks, a daily XP goal and an optional reminder keep you consistent

BLITZ MODE
Answer against the clock for bonus XP: 30 seconds for concept questions, 60 for the rest.

PREMIUM
The full path and the speed drills are free; lessons are limited by hearts. Premium adds unlimited hearts, blitz mode, jumping straight to any section, full stats (mastery by section, accuracy by question type and 30 days of XP) and a searchable question bank. Choose yearly, with a 3-day free trial, monthly, or a one-time lifetime purchase.

Yearly and monthly Premium are auto-renewing subscriptions. Payment is charged to your Apple Account at confirmation of purchase, or when a free trial ends, and the subscription renews at the end of each period unless you cancel at least 24 hours before it ends. Manage or cancel it in your App Store account settings. Lifetime is a one-time purchase and doesn't renew.

Privacy policy: https://lukazsdev.github.io/quantblitz/privacy/
Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Yearly | $79.99 | per year |
| Premium Monthly | $12.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium Lifetime | $199.99 | one-time |


## Is quant blitz safe?

Not enough ratings yet to assess quant blitz.

## Is quant blitz legit?

quant blitz: interview prep has limited verification signals. The AppsHunter Legitimacy Score for quant blitz is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 2.2 — 2026-11-06

Small fixes and polish.
New in Profile → Preferences: Ad measurement. If you turn it on, the app tells Meta when it's installed and opened, so we can see which of our Instagram ads work. Your answers and progress are never shared, and it stays off unless you choose it.

### 2.1 — 2026-10-27

Every question, re-checked. We went back through all 1,424 questions, re-ran every code snippet and recomputed every answer, and sharpened the wording and explanations wherever they could be clearer.

Plus small fixes and polish.

### 2.0 — 2026-10-24

qdev blitz is now quant blitz, with a Trading track.
• Trading: 320 new questions on probability, brainteasers, betting and game theory, market making and options.
• Mental math speed drills, Zetamac style, plus test conditions: 80 problems in 8 minutes.
• Pick your role when you start: Trading, or Dev for C++ and Python.
• Premium now comes yearly (with a 3-day free trial), monthly or lifetime.

### 1.2 — 2026-10-21

New app icon.

### 1.1 — 2026-10-20

• Question bank (Premium): search every question by topic, difficulty and type, and practise any of them.
• A faster start: pick a track and a goal, and you're on the path. The placement test is in Profile.
• New app icon and a new look for titles.

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## More apps by Velori Labs Ltd

- [Unchud: Stop being a chud](https://appshunter.io/ios/app/unchud-stop-being-a-chud/id6825074944)

All apps by Velori Labs Ltd: https://appshunter.io/developer/1895293469

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-06.*