--- title: "Neptune: Navigation Rules - Reviews, Revenue and Downloads in United States | Apple App Store" description: "PASS YOUR USCG COLREG & OOD EXAMS WITH CONFIDENCE Neptune: Navigation Rules is the only modern study system that combines the official USCG Question Bank with an AI Tutor, interactive 3D Visual Train" --- # Neptune: Navigation Rules — United States > USCG Exam & COLREGS Prep ![Neptune App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/b6/dd/8e/b6dd8e83-4d3e-a9ab-9c8a-2f034c1e39f4/Neptune-0-1x_U007epad-0-1-0-85-220-0.png/434x0w.png) **Developer:** [Brice Brown](https://apptail.io/developer/brice-brown-jFwd) **Category:** Education **Rating:** 5.0/5 (15 ratings) **Price:** Free **Bundle ID:** com.ByBrice.Neptune **Store:** Apple App Store **Country:** United States **Version:** 1.2.8 (released 2026-10-06) **Original Release:** 2026-01-20 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6756641315) **AppTail Page:** [https://apptail.io/app/neptune-navigation-rules-ypjy/united-states](https://apptail.io/app/neptune-navigation-rules-ypjy/united-states) ## Neptune Description PASS YOUR USCG COLREG & OOD EXAMS WITH CONFIDENCE Neptune: Navigation Rules is the only modern study system that combines the official USCG Question Bank with an AI Tutor, interactive 3D Visual Training, and verbatim cards. Whether you are an Ensign preparing for OOD Phase 1 or a Captain refreshing for a renewal, Neptune replaces heavy textbooks with a smart, pocket-sized coach. NEW: VERBATIm MEMORY TRAINER Level up recall: hide key phrases and type them back to prove you know the rule, not just the letter. Adaptive drills: auto-submit when blanks are filled, with instant feedback and retries to lock in weak spots. Inline citations: jump straight from a missed phrase to the exact rule text. 3D LIGHTS & SHAPES TRAINER Stop memorizing static flashcards. Interactive 3D Models: Rotate vessels to see lights and shapes from any angle. Quiz Mode: Answer questions based on target angle, vessel ID, cardinal direction, and rules of the road. AI-POWERED REFERENCE Don't just memorize the answer—understand the Why. Ask Neptune: Chat with an AI trained specifically on COLREGS and over 500 maritime court cases. Instant Explanations: Get plain-English breakdowns for every question with citations to the rules and cases. Legal Context: Using the court cases see how rules are adjudicated in the real world. COMPLETE USCG QUESTION BANK & BOOK Official Pool: Full access to Inland and International questions. Smart Citation: Every question is linked directly to the specific Rule it tests. Custom Tags: Add your own notes, highlights and rule references. INTELLIGENT TEST MODES Exam Simulator: Mimic the real test by creating presets with precise filters for question number, specific words to be omitted, and rules. Or enable the Smart algorithm to dish you out trouble questions. Study Mode: Filter by "Least Confident" to drill the questions you get wrong. Daily Challenges: Keep your streak alive with quick, timed quizzes to build a daily study habit. ADVANCED PROGRESS TRACKING Confidence Scores: Visualize your mastery of every Rule based on SM-2 Algorithm. Heat Maps: Instantly see if you are weak on "Steering & Sailing" or "Sound Signals." Detailed History: Review past attempts to track your improvement over time. THE MODERN STANDARD Offline Ready: Study in the SCIF or underway—no internet required. Dark Mode: Fully optimized for night watch study sessions. Cloud Sync: Start on your iPhone, finish on your iPad. ## Neptune Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/1f/a6/ac/1fa6ac07-fa28-4106-dded-ff02ed169fad/Screenshot_01.png/1242x2208.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/5d/4d/af/5d4dafac-1caf-309f-fd73-b2d1dcea74ed/Screenshot_04.png/1242x2208.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/1f/4e/db/1f4edb21-3042-04db-2c1d-58f521cb3345/Screenshot_02.png/1242x2208.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/9b/6b/f3/9b6bf351-3779-eee5-c74f-ab35f414a601/Screenshot_07.png/1242x2208.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/a8/eb/09/a8eb097d-bfb0-4c5b-18fc-462cf3b7a0a2/Screenshot_09.png/1242x2208.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/18/1d/e4/181de44d-ec15-82c4-6707-353def85a0a1/Screenshot_06.png/1242x2208.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/c9/c2/1d/c9c21dea-2b24-bf40-0e29-0e7f1f4de5b1/Screenshot_03.png/1242x2208.png) - [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/87/9c/85/879c8534-c8af-f06f-e387-7f32117e079f/Screenshot_08.png/1242x2208.png) - [Screenshot 9](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/49/67/52/49675217-837f-9ef4-b475-709de58b5ea0/Screenshot_05.png/1242x2208.png) - [Screenshot 10](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/21/2a/61/212a6141-4517-045b-b17c-22996a6fe77d/Screenshot_10.png/1242x2208.png) ## Neptune Rating Breakdown in United States - 5 stars: 15 (100%) - 4 stars: 0 (0%) - 3 stars: 0 (0%) - 2 stars: 0 (0%) - 1 stars: 0 (0%) ## Neptune Available In - [United States](https://apptail.io/app/neptune-navigation-rules-ypjy/united-states) - [Armenia](https://apptail.io/app/neptune-navigation-rules-ypjy/armenia) - [Bahrain](https://apptail.io/app/neptune-navigation-rules-ypjy/bahrain) - [Brunei](https://apptail.io/app/neptune-navigation-rules-ypjy/brunei) - [Brazil](https://apptail.io/app/neptune-navigation-rules-ypjy/brazil) - [Belize](https://apptail.io/app/neptune-navigation-rules-ypjy/belize) - [Switzerland](https://apptail.io/app/neptune-navigation-rules-ypjy/switzerland) - [Chile](https://apptail.io/app/neptune-navigation-rules-ypjy/chile) - [Cyprus](https://apptail.io/app/neptune-navigation-rules-ypjy/cyprus) - [Algeria](https://apptail.io/app/neptune-navigation-rules-ypjy/algeria) - [Ecuador](https://apptail.io/app/neptune-navigation-rules-ypjy/ecuador) - [Estonia](https://apptail.io/app/neptune-navigation-rules-ypjy/estonia) - [Spain](https://apptail.io/app/neptune-navigation-rules-ypjy/spain) - [France](https://apptail.io/app/neptune-navigation-rules-ypjy/france) - [Ghana](https://apptail.io/app/neptune-navigation-rules-ypjy/ghana) - [Hong Kong SAR China](https://apptail.io/app/neptune-navigation-rules-ypjy/hong-kong) - [Croatia](https://apptail.io/app/neptune-navigation-rules-ypjy/croatia) - [Hungary](https://apptail.io/app/neptune-navigation-rules-ypjy/hungary) - [Indonesia](https://apptail.io/app/neptune-navigation-rules-ypjy/indonesia) - [Ireland](https://apptail.io/app/neptune-navigation-rules-ypjy/ireland) - [Iceland](https://apptail.io/app/neptune-navigation-rules-ypjy/iceland) - [Japan](https://apptail.io/app/neptune-navigation-rules-ypjy/japan) - [Kenya](https://apptail.io/app/neptune-navigation-rules-ypjy/kenya) - [Sri Lanka](https://apptail.io/app/neptune-navigation-rules-ypjy/sri-lanka) - [Lithuania](https://apptail.io/app/neptune-navigation-rules-ypjy/lithuania) - [Luxembourg](https://apptail.io/app/neptune-navigation-rules-ypjy/luxembourg) - [Latvia](https://apptail.io/app/neptune-navigation-rules-ypjy/latvia) - [Madagascar](https://apptail.io/app/neptune-navigation-rules-ypjy/madagascar) - [Malta](https://apptail.io/app/neptune-navigation-rules-ypjy/malta) - [Nigeria](https://apptail.io/app/neptune-navigation-rules-ypjy/nigeria) - [Netherlands](https://apptail.io/app/neptune-navigation-rules-ypjy/netherlands) - [Nepal](https://apptail.io/app/neptune-navigation-rules-ypjy/nepal) - [Oman](https://apptail.io/app/neptune-navigation-rules-ypjy/oman) - [Panama](https://apptail.io/app/neptune-navigation-rules-ypjy/panama) - [Philippines](https://apptail.io/app/neptune-navigation-rules-ypjy/philippines) - [Qatar](https://apptail.io/app/neptune-navigation-rules-ypjy/qatar) - [Slovenia](https://apptail.io/app/neptune-navigation-rules-ypjy/slovenia) - [Slovakia](https://apptail.io/app/neptune-navigation-rules-ypjy/slovakia) - [Tunisia](https://apptail.io/app/neptune-navigation-rules-ypjy/tunisia) - [Uzbekistan](https://apptail.io/app/neptune-navigation-rules-ypjy/uzbekistan) - [United Arab Emirates](https://apptail.io/app/neptune-navigation-rules-ypjy/united-arab-emirates) - [South Africa](https://apptail.io/app/neptune-navigation-rules-ypjy/south-africa) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends. - [Search Apps](https://apptail.io) - [Top Charts](https://apptail.io/top-iphone-apps) - [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer) *Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*