Get the most out of your certification study experience
CertStack currently covers three CompTIA cybersecurity certifications: Security+ (SY0-701), PenTest+ (PT0-003), and CySA+ (CS0-003). All certifications are included in a single subscription.
New subscribers get a 7-day free trial with full access to all premium features across all three certifications. You can cancel anytime during the trial without being charged. If you don't cancel, your subscription will begin billing automatically.
You can cancel your subscription through Google Play: Open Google Play Store → tap your profile icon → Payments & subscriptions → Subscriptions → CertStack → Cancel. You'll retain access until the end of your current billing period.
CertStack uses the SM-2 spaced repetition algorithm to optimize your study schedule. Questions you answer correctly are shown less frequently, while questions you struggle with appear more often. This scientifically-proven method maximizes long-term retention with minimal study time.
PBQs simulate the hands-on question formats found on CompTIA exams. CertStack includes ordering, matching, fill-in-the-blank, and scenario-based PBQ types to prepare you for the real exam experience.
The AI assistant is context-aware for whichever certification you're currently studying. Ask it to explain concepts, clarify wrong answers, provide real-world examples, or quiz you on specific topics. It's like having a personal tutor available 24/7.
No. CertStack is an independent study tool created by CertStack. It is not affiliated with, endorsed by, or sponsored by CompTIA. Our content is based on publicly available exam objectives.
You can delete your account from the App: go to Settings → Account → Delete Account. This will permanently remove your study data within 30 days. Be sure to cancel your subscription first through Google Play.
Yes. All study progress, spaced repetition data, and quiz results are synced in real-time through your account. Sign in on any device to pick up where you left off.
Our support team is here to help you succeed on your certification journey.
Email SupportWe typically respond within 24 hours