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
3D Osteology
3D Osteology offers one of the most complex osteology 3D atlases available
$8.99 · In-app purchases
PRICE
$8.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.6
8 ratings · Top 50%
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 3D Osteology: 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
Enhance model interactions with animations and detailed views.
Assumption to check: Limited 3D interaction features
Validate with people who use this workflow before building.
Hypothesis 2
Introduce a subscription model for better access.
Assumption to check: High one-time purchase cost
Validate with people who use this workflow before building.
Hypothesis 3
Add quizzes and achievements to increase user retention.
Assumption to check: Low user engagement due to lack of gamification
Validate with people who use this workflow before building.
Hypothesis 4
Expand learning materials and resources related to bones.
Assumption to check: Limited educational 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
3D Osteology offers one of the most complex osteology 3D atlases available. Whether you’re a healthcare professional, a student of anatomy, or simply fascinated by human anatomy, this app provides unparalleled clarity and insight into the skeletal system. With over 850 IFAA-recognized structures of the human skeleton, 3D Osteology presents a comprehensive exploration into the foundation of anatomy—osteology—delivering detailed, high-resolution 3D models of the human skeleton for an in-depth understanding. In addition, each structure is narrated concisely, allowing users to follow a focused anatomy course while interacting with the models in real-time. The complete narration course spans over 5 hours, offering a seamless and engaging blend of auditory learning and hands-on exploration. Immersive 3D Experience Navigate through high-resolution 3D models of the skeletal system. Rotate, zoom, and move individual bones and structures for unmatched clarity and precision. Extensive Atlas Delve into over 800 detailed skeletal structures. Explore every bone with a level of realism never seen before. Photorealistic Graphics Enjoy cutting-edge graphics technology that brings each bone and anatomical structure to life with photorealistic detail and realism. Easy Exploration Quickly search and access any bone or structure with an intuitive, searchable index and curated content. No need to set anything up—simply explore. Disarticulate Individual Bones Interact with each bone of the skull individually. Easily disarticulate and study bones in full detail for a deeper understanding of their anatomy. Accessible Anywhere No internet? No subscription? No problem. Your osteological journey can continue wherever you are. Disclaimer 3D Osteology is an educational tool and is not intended to diagnose, treat, or provide medical advice.For educational use, we recommend consulting authoritative resources or professional guidance to ensure accuracy and complement your learning experience. We’re continually improving 3D Osteology. If you notice any inaccuracies or need extra content, please contact us. Your feedback helps us make the app better. If you enjoy the app, leave a review and share your thoughts. Thank you for your support!
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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.
SUGGESTED BUILD STACK
React Native
Expo
Supabase
@react-navigation/native
zustand
expo-three
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.
