Zero Deficit CriticalCare Prep

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About this app

📚 WHAT'S INSIDE

Zero Deficit CriticalCare Prep is built by an ICU nurse, for ICU nurses — everything you need to pass the AACN CCRN exam and sharpen real bedside practice.

🧠 PRACTICE QUESTIONS THAT NEVER RUN OUT
• Unlimited AI-generated practice questions with Premium — drill any topic as much as you want
• 695+ expert-written questions with detailed rationales, covering the full AACN exam blueprint: Cardiovascular, Pulmonary, Endocrine, Hematology/Immunology, GI, Renal, Integumentary, Musculoskeletal, Neurological, Multisystem, plus Behavioral, Psychosocial, and Professional Caring & Ethical Practice
• Two untimed Practice Quizzes (100 questions each) with instant rationales, PLUS a comprehensive 200-question Final Test that randomizes every attempt

🫀 NEW: ICU MEDICATIONS REFERENCE
A fast, bedside-style reference for 77 high-alert critical-care medications — vasopressors & inotropes, sedation & analgesia, antiarrhythmics, vasodilators & antihypertensives, neuromuscular blockers, anticoagulants & reversal, antidotes, electrolytes, and more. Each drug card shows standard concentrations, weight-based dose ranges, loading and max doses, titration targets, onset/duration, monitoring, adverse effects, incompatibilities, and reversal agents — cross-checked against FDA labels and clinical guidelines. (Reference only — always follow the ordered dose and your facility's protocols.)

✨ EVERYTHING ELSE
• 8 body-system study guides packed with high-yield clinical content
• Interactive flowcharts — shock, ABG interpretation, arrhythmia recognition
• Cheat sheets and test-taking strategy breakdowns
• Smart flashcards with spaced repetition
• Progress tracking, study streaks, and bookmarks
• Works on phone, tablet, and web — your progress syncs everywhere

🆓 START FREE — NO CREDIT CARD NEEDED
The free tier includes system study guides, system quizzes, flashcards, a sample quiz, and 10 AI-generated questions per day — no card required to start.

⭐ GO PREMIUM
Unlock UNLIMITED AI questions, the full ICU Medications Reference, cheat sheets, interactive flowcharts, the 200-question Final Test, question breakdowns, and printable resources. Start a card-required 3-day free trial, then choose:
• Monthly — $14.99/month
• Annual — $84.99/year (best value)
• Lifetime — $199.99 one-time
Cancel anytime; manage your subscription in Google Play.

👩‍⚕️ WHY ZERO DEFICIT
Created by a practicing critical care nurse who knows what the exam — and the bedside — actually demand. No fluff, no decades-old textbook filler. Just focused, current, high-yield prep that respects your time.

⚠️ Educational and reference use only. Not medical advice, and not a substitute for clinical judgment, a pharmacist, or your institution's protocols.

Pass your CCRN with confidence. Download Zero Deficit and start free today.
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Unlimited AI CCRN questions, ICU drug reference, practice tests & study guides
Updated on
Aug 16, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
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  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

Updated for Android 16 with the latest Google Play billing and security requirements
•Smoother, more reliable purchase flow with automatic reconnection
•Improved display on devices with notches and gesture navigation
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