It doesn't have enough ratings yet to judge what users think.
ZeroDay Dev is made and published by
John Lawniczak.
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The app name, icon, screenshots and description belong to John Lawniczak and are shown as
published on the App Store.
About ZeroDay Dev
ZeroDay Dev is an education app developed by John Lawniczak.
User Ratings
ZeroDay Dev is rated 4.75 out of 5 stars. The rating is based on 4 ratings.
App Information
ZeroDay Dev is freely available from the App Store. The app size is 79.63 MB. The latest version available is 3.2. The last update was on October 6, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since March 2026.
Description by John Lawniczak(from the App Store)
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.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
