ZeroDay Dev
John Lawniczak Education iPhoneiPadiPod touch
ZeroDay Dev is a free Education app for iPhone and iPad by John Lawniczak. Rated 4.8/5 from 4 ratings. Requires iOS 17.0. Updated September 25, 2026.
- Rating
- 4.8
- 4 ratings
- Price
- Free
- on the App Store
- Size
- 76 MB
- Age 4+
- Updated
- Sep 25
- 2026 · v3.0
Screenshots
About ZeroDay Dev
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.
What’s new
Version 3.0 · Updated September 25, 2026
- Learn multiparty computation (MPC) from the basics to advanced review with examples, threshold signatures, recovery scenarios and a treasury capstone. - Explore AI Home Lab guides for building and fine-tuning language models, plus Jev, Altar-1 and updated models. - Build stronger foundations in networking, distributed systems, market making, options and machine learning with expanded guided practice. - Understand private Ethereum transaction routing and find HSMs and TEEs together under Systems & Cloud Security.
App privacy
The developer, John Lawniczak, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
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| App | Rating | Price | Last updated |
|---|---|---|---|
| ZeroDay Dev | 4.8 / 5 (4 ratings) | Free | September 25, 2026 |
| SolidityHub | – | 6.99 USD | Aug 14, 2026 |
| CompTIA PenTest Prep PT0-003 | – | Free | Aug 5, 2026 |
| AI Engineer Quiz | – | Free | Jun 27, 2026 |
| JavaScript Programming | – | Free | May 17, 2026 |
| Locked In: Prep for OSCP | – | Free | Aug 26, 2026 |
| Pinax | – | Free | Jan 13, 2026 |