# Zero Deficit: CCRN Exam Prep — ICU Nurse Practice Questions > CCRN exam preparation app with practice questions, flashcards, and AI-driven study tools. (iPhone/iPad app by ZERO DEFICIT LLC.) - Source: https://appshunter.io/ios/app/zero-deficit-ccrn-exam-prep/id6758719491 (this page in markdown: same URL + `.md`) - Developer: [ZERO DEFICIT LLC](https://appshunter.io/developer/1874574916) - Category: Education, Medical - Price: Free with in-app purchases - Rating: 5.00/5 from 4 App Store ratings · 3 written reviews indexed - Age rating: 12+ - Requires: iOS 15.0 · 3 MB - Languages: American English - Released: 2026-03-30 - Data updated: 2026-08-25 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/zero-deficit-ccrn-exam-prep/id6758719491/reviews.md ## What is Zero Deficit? Pass the CCRN exam with Zero Deficit — critical care nursing certification prep built by ICU nurses who actually passed. EVERYTHING YOU NEED TO PASS • 695+ CCRN practice questions with detailed rationales, covering every body system on the AACN exam blueprint • 8 in-depth study guides weighted exactly like the real exam: Cardiovascular (17%), Respiratory (15%), Multisystem (14%), Neurology (12%), Renal, GI, Endocrine, Hematology • 200-question timed CCRN exam simulation with scoring and a readiness level • Two 100-question practice quizzes to build test-day stamina • AI-powered question generator that creates fresh questions tuned to your weak areas • Spaced-repetition flashcards based on cognitive science • High-yield cheat sheets and question-breakdown strategy training ICU CLINICAL REFERENCE • 77-medication ICU drug reference: vasopressors, sedation, anticoagulants, antiarrhythmics and more — with typical dose ranges • Hemodynamic monitoring guide: normal values, PA catheter waveforms, shock profiles • Shock, ABG and arrhythmia flowcharts for rapid review STAY ON TRACK • Exam countdown with readiness tracking • Daily question notifications that keep your streak alive • Progress analytics by body system so you always know where to focus • Study streaks, achievements and a weekly leaderboard BUILT FOR ICU NURSES, BY ICU NURSES Every feature came from real feedback during the 30 most stressful days before exam day. 12-hour shift followed by a 2-hour study session? We built the app we wish we'd had. STUDY ANYWHERE Print any study guide as a clean, formatted PDF for break-room review. All 8 body-system study guides and their quizzes are free — no account required. WHO USES ZERO DEFICIT • ICU registered nurses preparing for AACN CCRN (Adult) certification • CVICU, MICU, SICU, NSICU and CCU staff • ER nurses transitioning to critical care • Travel nurses studying between assignments • Nurse managers earning the CCRN to stay clinical SIMPLE PRICING Free: all 8 body-system study guides + system quizzes. A free account starts a 3-day full-access trial — no credit card required. Go premium with Monthly, Yearly or Lifetime access (auto-renewable subscription or one-time lifetime purchase) to unlock the full question bank, exam simulation, cheat sheets, ICU drug reference and flashcards. Content is written and source-checked against FDA labels and major clinical guidelines (AHA/ACLS, Surviving Sepsis Campaign, SCCM). Educational material — not medical advice. CCRN® is a registered trademark of AACN Certification Corporation. Zero Deficit is an independent study platform and is not affiliated with or endorsed by AACN. ## Key features - 695+ high-yield practice questions - Detailed rationales for every question - AI-powered personalized study guides - 190+ smart flashcards with spaced repetition - Full-length simulation exams - Detailed performance analytics - Exclusive cheat sheets ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Zero Deficit CCRN PREP MONTHLY | $14.99 | per month | | Zero Deficit CCRNPrep PremiumAnnual | $84.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Zero Deficit CCRN Prep Lifetime | $199.99 | one-time | ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/zero-deficit-ccrn-exam-prep/id6758719491/reviews.md ### 5/5 — Great content *2026-05-29* Questions and rationales truly are the reason I passed the CCRN. Great app!! ### 5/5 — Ideal prep *2026-05-20* This app has been phenomenal for CCRN certification prep ### 5/5 — Review *2026-05-19* This app allowed me to prepare for my certification tests like any other. I highly recommend this app. I will be continuing to use it as I continue my education. ## Frequently asked questions about Zero Deficit ### What is the short name for Zero Deficit CriticalCare Prep? The short name for Zero Deficit CriticalCare Prep is Zero Deficit. ### How does Zero Deficit help me study for the CCRN exam? Zero Deficit provides over 695 practice questions with detailed rationales, AI-powered study personalization, smart flashcards using spaced repetition, and full-length simulation exams to help you master critical care concepts and identify weak areas. ### Does Zero Deficit offer a free trial? Yes, Zero Deficit offers a 72-hour full access free trial with unlimited access to all features, including practice questions, flashcards, study guides, and AI features. No credit card is required to start the trial. ### What are the subscription plans for Zero Deficit? Zero Deficit offers a monthly subscription for $14.99 with a 3-day free trial, and an annual subscription for $84.99. These plans provide continued access to the premium features after the initial trial period. ### How does the AI personalization in Zero Deficit work? The AI in Zero Deficit analyzes your performance in real-time to identify specific knowledge gaps. It then generates custom study guides and targeted question sets to help you focus on areas where you need the most improvement, such as hemodynamics or neurology. ### Does Zero Deficit have ads? Yes, Zero Deficit contains advertisements. While it offers a free trial and in-app purchases for subscriptions, users should expect to encounter ads within the application. ### What devices is Zero Deficit available on? Zero Deficit is available on iPhone, iPad, and iPod devices. It is designed to support iOS operating systems. ### How often is Zero Deficit updated? The latest version of Zero Deficit is 1.1.3, and it was last updated on May 27, 2026. This indicates a recent update, suggesting the app is actively maintained. ## Version history (last 5 releases) ### 1.1.6 — 2026-08-18 • Performance and reliability improvements • Smoother, faster study sessions on iPhone and iPad Studying for the CCRN? All 8 body-system study guides are free — and your free account starts a 3-day full-access trial. ### 1.1.5 — 2026-08-09 WHAT'S NEW IN 1.1.5 - Links now open directly in the app: tap any zerodeficitccrnprep.com link (including www links) from email, messages, or search results and land exactly where you need to be, no browser detour. - Smoother sign-in: saved passwords from iCloud Keychain now autofill more reliably. - Behind-the-scenes reliability improvements for a faster, more stable study session. WHY NURSES CHOOSE ZERO DEFICIT Zero Deficit is CCRN prep built the way critical care nurses actually study: focused, evidence-based, and zero fluff. EXAM-STYLE PRACTICE THAT MIRRORS THE REAL TEST - 695+ CCRN-style questions written to the current AACN exam blueprint - Detailed rationales on every question, so you understand the why, not just the what - Full-length timed practice tests to build exam-day stamina - Topic-by-topic quizzes across Cardiovascular, Pulmonary, Endocrine, Hematology, Neurology, GI, Renal, Multisystem, and Professional Caring and Ethical Practice STUDY TOOLS THAT KEEP YOU CONSISTENT - Daily Question: one high-yield question every day to keep your streak alive - Streak tracking and milestone celebrations that make consistency automatic - Smart progress tracking shows your strongest and weakest systems at a glance - Study reminders so a busy shift schedule never derails your prep REFERENCE WHEN YOU NEED IT - Concise, ICU-focused study guides you can review between patients - Clear breakdowns of hemodynamics, ventilation, ABGs, drips, and more BUILT FOR REAL LIFE IN THE ICU - Clean, fast interface designed for quick study sessions on breaks - Your progress syncs securely to your account - Night-shift friendly: study anywhere, anytime Whether you are months out or cramming your final week, Zero Deficit meets you where you are and gets you to exam day with confidence - and zero knowledge deficits. Start your 3-day free trial and see why critical care nurses are making Zero Deficit their CCRN study partner. Questions or feedback? We read everything: support@zerodeficitccrnprep.com ### 1.1.4 — 2026-07-23 > **1.1.4 — Fresher on launch.** Fixed an issue where the app briefly > showed a previous version's layout on cold launch. New content and > screen redesigns now appear immediately on the first open after an > update. ### 1.1.3 — 2026-05-27 Build 17 / Version 1.1.3 fixes the rare "Connection Error" issue that some users hit after relaunching the app. What changed: • Smarter retry on failed loads. The app now silently re-tries the network three times with growing back-off before showing any error. • Deeper cache clearing on retry. If a previous launch left the app's local web cache or Service Worker in a corrupted state, the new retry path automatically wipes that storage and reloads cleanly — without needing to uninstall the app. • New "Reset App Data" recovery button. If you ever do get the connection screen, tap Reset App Data for an in-app one-shot recovery that's equivalent to deleting and reinstalling — but faster, and you stay in the app. • Live-network awareness. The app now uses the device's built-in network monitor to detect when you regain connectivity and auto-retries the load — no need to back out and reopen. • Inline reconnect banner instead of a full-screen error. While the app is retrying, you'll see a small banner at the top with progress; the screen stays clean. Why we shipped it: A small group of users reported the app showing "Unable to connect" even after relaunching, even with a working internet connection. The root cause was a corrupted WKWebView cache or Service Worker registration left over from a previous launch — these survive a normal reload but get wiped on app deletion. Build 17 clears those automatically, permanently fixing the issue. No new permissions, no new in-app purchases, no design changes — just a more resilient connection layer and a fast recovery path if anything ever does go wrong. Thank you to every CCRN candidate who reported this. Your feedback shipped this fix. ### 1.1.2 — 2026-05-25 This is a reliability-focused update built around the moments that matter most for CCRN nurses studying on the go — when your WiFi drops mid-flashcard, when you switch from hospital to home network, or when you need to resume Premium access on a new device. What's improved: Smoother reconnection on weak networks The app used to throw a "Connection Error" the instant a request stalled. Now it silently retries up to 3 times in the background with a subtle "Reconnecting…" indicator. Most users on flaky WiFi or low cellular signal will never see an error again. Retry button that actually works If a connection error does appear, tapping Retry now performs a true fresh request — it stops any stuck request, bypasses cached failures, and gives you a clean attempt. No more tapping Retry only to see the same error reappear seconds later. Auto-recovery when your WiFi comes back If you're stuck on the Connection Error screen and your network reconnects, the error dismisses itself and the app loads automatically. No need to tap anything. Restore Purchases properly resyncs Fixed a bug where some Premium subscribers saw "No previous purchases found" even though they had an active subscription. The app now refreshes your StoreKit receipt before checking entitlements, so Restore Purchases reliably brings back your access. Better deep-linking Links tapped from Pinterest, Safari, push notifications, or other apps now correctly survive the retry process — you land where you intended, not on the homepage. Smarter "No Internet Connection" message When your device is truly offline (no WiFi and no cellular), you'll see a clearer message explaining what's going on instead of watching the app churn through pointless retries. Thanks for studying with Zero Deficit. Pass that CCRN. Both clean, no emojis, no special characters that App Store Connect will reject. Ready to paste. ## More apps by ZERO DEFICIT LLC - [Apex Fitness: AI Gym Trainer](https://appshunter.io/ios/app/apex-fitness-ai-gym-trainer/id6762759265) All apps by ZERO DEFICIT LLC: https://appshunter.io/developer/1874574916 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*