The only mobile-first Web3 security app. 150+ real exploits. 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.
dowloaded out of curiosity and didn't expect much, but it actually held my attention longer than most apps like this. the interactions and actually tapping the vulnerable lines/code make you pause and think in a different way. some pretty funny easter eggs too. i've found myself coming back to it without really planning to, which says a lot. simple ideas but they work.
Pretty neat!
OregonBillsFan
Enjoyed all the latest exploit data to search through and enjoyed the memory exam section the most. :)
Deep Dive polish — Faster navigation, a new favorites shelf, smoother customization, and added contract links and papers.
Practice filters — Hide and reorder chips so it is easier to focus on the topics you want.
More real-world learning — New exploit content, glossary links, and refreshed security packs.
Version 1.6
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
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
John Lawniczak
Size
35.1 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.
