Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
Ace your ultrasound registry
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Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Prepry - ARDMS & CCI Exam Prep: map the core Medical workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Assumption to check: Limited question variety and depth can lead to user frustration.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No community features or peer comparisons.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Basic performance metrics without actionable insights.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Ace your ultrasound registry. 100,000+ students trust Prepry to ace their classes and pass their ARDMS®, CCI®, and ARRT® registry exams. Content written or reviewed by RDMS®, RVT®, RDCS®, RCS®, and RVS® educators and radiologists. 9,400+ practice questions. 750+ sonographic images. AI-powered study tools. Spaced repetition. Mock exams. Earn your RDMS®, RVT®, RDCS®, RCS®, or RVS® credential. QUESTION BANK (9,400+ Questions) • ARDMS® SPI Ultrasound Physics exam: 1,150 • ARDMS® Abdomen (AB) exam: 1,060 • ARDMS® OB/GYN exam: 715 • ARDMS® Adult Echocardiography (AE) exam: 710 • ARDMS® Vascular Technology (VT) exam: 700 • ARDMS® MSK Sonography exam: 660 • ARDMS® Pediatric Sonography (PS) exam: 390 • ARDMS® Breast Sonography (BR) exam: 370 • ARDMS® Fetal Echocardiography (FE) exam: 170 • CCI® Registered Cardiac Sonographer (RCS®) exam • CCI® Registered Vascular Specialist (RVS®) exam • ARRT® Sonography, Breast Sonography, and Vascular Sonography exams Detailed explanations for every answer. Answer distribution charts show how others answered. 750+ SONOGRAPHIC IMAGES Anatomy, pathology, and diagnostic imaging across every specialty. AI-POWERED STUDY TOOLS • AI Explanations: Instant AI breakdowns of any question. • AI Video Tutor: Ask questions during video lessons. • AI Readiness Score: Analyzes your coverage, mock scores, mastery, and weak areas to estimate your exam readiness. VIDEO COURSES • SPI Ultrasound Physics, Abdomen, Vascular Technology, OB/GYN Expert-led with transcripts, speed control, and in-video notes. Free lessons available. STUDY MODES • Timed Mock Exams: Simulate the registry exam format and timing. • Quiz Builder: Custom exams by chapter, topic, or difficulty. • Flashcards with spaced repetition scheduling. • Study Blocks for focused review sessions. • Free Question of the Day and Quick 10 quizzes. TRACK YOUR PROGRESS • Readiness score, weak area identification, chapter-by-chapter breakdown. • Exam countdown, study reminders, daily goals. • Streaks, badges, XP, and leaderboards. STUDY PLANNER Personalized day-by-day schedule based on your exam date with question targets, mock exam days, and days off. PASS GUARANTEE Did not pass? Get 3 extra months free. • Dark mode. Offline access. • Notes linked to questions, explanations, and video timestamps. • Educator portal with cohort management, assignments, and analytics. Subscriptions can be managed and auto-renewal turned off in App Store Settings after purchase. Refunds will not be provided for any unused portion of the term. - https://www.prepry.com/privacy-policy - https://www.prepry.com/terms-of-service - https://www.prepry.com/disclaimer ARRT® and THE AMERICAN REGISTRY OF RADIOLOGIC TECHNOLOGISTS® are registered trademarks of The American Registry of Radiologic Technologists. R.T.®, R.T.(R)(ARRT)®, R.T.(S)(ARRT)®, and R.T.(VS)(ARRT)® are certification marks of The American Registry of Radiologic Technologists. ARDMS® is a registered trademark of the American Registry for Diagnostic Medical Sonography, and RDMS®, RVT®, and RDCS® are certification marks of ARDMS®. CCI® is a registered trademark of Cardiovascular Credentialing International, and RCS® and RVS® are certification marks of CCI®. None of these organizations have been involved in the development of our products, have an affiliation with this app, or endorse our content. Ownership of all trademarks mentioned belongs to their respective holders. Prepry covers ultrasound physics, Doppler imaging, transducer mechanics, acoustic artifacts, hemodynamics, and imaging principles for ARDMS®, CCI®, and ARRT® sonography exams. Prepare for SPI, abdomen, OB/GYN, vascular, adult echo, fetal echo, breast, pediatric, MSK, RCS®, RVS®, and ARRT® sonography specialty exams. For sonography students, DMS graduates, and working sonographers pursuing RDMS®, RVT®, RDCS®, RCS®, or RVS® credentials. Not for clinical use or medical advice.
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.