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.
App Overview
USMLE-Rx
USMLE-Rx (by ScholarRx)
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
5,005 ratings · Top 15%
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for USMLE-Rx: 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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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Implement clearer icons and labels for navigation.
Assumption to check: Navigation can be confusing with multiple tabs.
Validate with people who use this workflow before building.
Hypothesis 2
Provide detailed explanations and references for each question.
Assumption to check: Limited explanation for practice questions.
Validate with people who use this workflow before building.
Hypothesis 3
Create a more transparent paywall and benefits for premium users.
Assumption to check: Subscription model can be unclear.
Validate with people who use this workflow before building.
Hypothesis 4
Establish a regular schedule for adding new study materials and questions.
Assumption to check: Inconsistent updates for content.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
USMLE-Rx (by ScholarRx) Ready to own the USMLE and master medical school? Now you can access any high-yield USMLE-Rx tool in one great app!* Get on-the-go access to USMLE board-style questions, Rx Bricks, flash cards, and videos. Qmax: Study anytime, anywhere with your USMLE-Rx Qmax Subscription: · Thousands of high-yield Step 1 questions, images, and explanations · All your tests sync to the cloud for immediate access on any device · Quiz yourself in multiple test modes with different question types · Get detailed performance stats Rx Bricks · Nearly 800 high-yield, patient-centered eLearning modules · “Need-to-know” topics succinctly explained with simple "clear language" explanations, often in under 20 minutes · Clinical correlations, real-world stories, memorable mnemonics, and more · Assess your understanding with measurable objectives, interactive flashcards, and practice questions built into each module Flash Facts Learning is literally at your fingertips with Step 1 Flash Facts: · Over 14,000 flash cards help you nail USMLE Step 1 content quickly and efficiently · Case-based flash cards put basic science concepts in a clinical context · Study Stream uses spaced repetition to give you flash cards based on your own study schedule as well as your strengths and weaknesses · Daily reporting helps you track your progress · All your cards and progress sync to the cloud for immediate access on any connected device · Searchable by organ system, discipline, and topic Express Videos · Over 80 hours of high-yield videos, over 1,300 videos in all · 600+ images, helpful diagrams, and multimedia clips · Integrations across multiple topics form strong, lasting connections to help you in class and on test day *Requires a valid subscription to Rx360+, USMLE-Rx Step 1 Qmax or Step 2CK Qmax, Rx Bricks, Step 1 Flash Facts, and/or Express Videos. Terms and Conditions: https://www.usmle-rx.com/terms-and-conditions/ Privacy Policy: https://www.usmle-rx.com/privacy/
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Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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BUILD KIT DIFFICULTY
Advanced
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.
