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.
SpinopelvicCalc is an educational tool designed to assist in the visualization and understanding of sagittal spinopelvic alignment through radiographic analysis.
$24.99 · In-app purchases
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 Spinopelvic Calc: 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 user engagement due to lack of interactive features
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: High upfront cost may deter users
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Absence of community support or forums for users
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No personalized experience based on user data
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.
SpinopelvicCalc is an educational tool designed to assist in the visualization and understanding of sagittal spinopelvic alignment through radiographic analysis. The app allows users to analyze both lumbosacral and full-spine radiographs, facilitating a structured approach to key alignment parameters and morphological patterns. It is intended for educational use, supporting spine surgeons, residents, and trainees in the study of sagittal balance and its components. Key features Radiographic Analysis Evaluate lumbosacral and panoramic (full-spine) radiographs in a simple and intuitive workflow. Spinopelvic Parameters Visualize and explore key parameters such as pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS), and lumbar lordosis (LL). Alignment Comparison Compare current alignment with reference alignment values to better understand sagittal balance relationships. Lumbar Curve Morphology Identify the lumbar apex and explore sagittal alignment patterns based on established concepts such as the Roussouly classification. Step-by-Step Landmark Guidance Guided point placement to support consistent and reproducible radiographic assessment. Medical Disclaimer: This application is intended for use by medical professionals as a decision-support tool. It does not provide medical diagnosis or treatment. Always seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this application.
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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.