ZeroDay Dev

Learn to break things

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Learn Web3 and AI security on your phone. Explore 200+ real exploits, AI jailbreaks, supply-chain attacks, and hands-on labs. Offline. $4.99 once. Learn to break things—before attackers do. ZeroDay Dev teaches secure coding and blockchain security through 4,000+ hands-on challenges. Learn from 120+ real-world exploits: Beanstalk, Indexed Finance, bZx, VeilCash, Sigma.Money, Bybit, and more. Each exploit is linked to verified incident records so you learn from actual on-chain events, not hypotheticals. Practice — Build exploit intuition without reading docs. Tap vulnerable lines, drag tokens into code, get instant feedback. Filter by domain (Exploits, Solidity, Rust, DeFi, Solana) or difficulty. Exercises — Full code challenges with reference solutions. Deeper dives when you're ready. Exam — Prepare for real security assessments. Timed tests across domains with performance tracking. Memory-match decks for opcodes, EIPs, and security terms. Deep Dive Hub — Curated learning tracks for Web2, Web3, Rust, ZK Proofs, and Trading. Recommended tracks driven by your weak areas. Build your own from bookmarks or missed questions. Streaks & XP — Stay consistent and level up. Daily streaks, badges, and progression keep you coming back. Offline-first — Learn on the subway, no Wi‑Fi needed. All content lives on your device. No account required—start immediately. Covers reentrancy, oracle manipulation, flash loans, proxy races, ZK trusted setup, and more. Rust, Solidity, DeFi, Solana & cybersecurity.

  • 4.8
    out of 5
    4 Ratings

- Learn Monad from the protocol up, including MonadBFT, RaptorCast, sub-second finality, parallel execution, local mempools, transaction ordering, MEV boundaries, and recent network revisions. - Every Deep Dive now begins with concise History & Context so you can understand where a technology came from and why it matters before starting the exercises. - Mobile Security now includes practical GrapheneOS installation and hardening guidance, plus careful setup and recovery warnings for duress credentials. - Newer real-world incidents including AFX Trade, the Verus Ethereum Bridge, B² Network, 42DAO, and an AI model-evaluation intrusion. - Fund-tracing lessons now cover address poisoning, exchange service boundaries, and clearer techniques for following assets across systems. - New SBOM and tarball glossary entries strengthen software supply-chain coverage, with broader security-content and reliability improvements throughout the app.

The developer, John Lawniczak, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    • John Lawniczak
    Size
    • 50.3 MB
    Category
    • Education
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 John Lawniczak