NullByte

Learn cybersecurity like a game: short sessions every day, simple explanations, and a terminal where you can get hands-on with real-world cases. In just a few minutes each day, you'll be seriously preparing for the CompTIA certification exams.

▸ A GUIDED COURSE
Start from scratch and work your way up one step at a time: Fundamentals, Network, Identity, Web, Malware, Blue Team, Cryptography, and more. Each stage unlocks the next, so you don't get lost.

▸ LEARN BY DOING — THE TERMINAL
A simulated "hacker-style" terminal: scan a network, read the logs, find the flaw, and close it. Real commands (nmap, dig, curl, grep, ssh, etc.) with realistic output. You don't learn by rote: you learn the method—first I look, then I understand, then I act.

▸ PREPARE FOR COMPTIA CERTIFICATIONS
Targeted questions and exam simulations with a timer for Security+ (SY0-701), Network+ (N10-009), A+ (220-1101 / 220-1102), and PenTest+ (PT0-002). At the end, you'll see what you did wrong and why, along with your passing score estimate.

▸ REWARDING CONSISTENCY
Daily goal, daily streaks, levels, medals, and intelligent review of your weaknesses: come back every day because it works.

▸ YOUR PROGRESS, ANYWHERE
Sign in with Google and your progress is saved and synced across all your devices. You can also use the app without an account: your data stays on your phone.

▸ FREE + PRO
Study and try for free. With NullByte PRO, you unlock all the questions, terminal scenarios, and complete exam simulations.

Whether you're starting from scratch or reviewing for the exam, NullByte turns studying cybersecurity into something you'll want to do every day.

NullByte is an educational tool. Terminal scenarios are simulated and designed for learning in authorized environments.

CompTIA, Security+, Network+, A+, and PenTest+ are trademarks of their respective owners; the app is an independent study tool and is not affiliated with or endorsed by CompTIA.