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
Probiotic Search
Probiotic Search helps you explore scientific literature on probiotics quickly and clearly.
$6.99 · In-app purchases
PRICE
$6.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included16 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 Probiotic Search: map the core Reference 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
Provide detailed descriptions and user reviews for each probiotic.
Assumption to check: Limited information about probiotics can lead to user frustration.
Validate with people who use this workflow before building.
Hypothesis 2
Implement advanced search filters and intuitive navigation.
Assumption to check: Difficult to navigate through categories and search can be cumbersome.
Validate with people who use this workflow before building.
Hypothesis 3
Add community features for user reviews and Q&A.
Assumption to check: Lack of user engagement features (e.g., community reviews).
Validate with people who use this workflow before building.
Hypothesis 4
Regularly update the database with the latest research and user feedback.
Assumption to check: Potentially outdated information about probiotics.
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
Probiotic Search helps you explore scientific literature on probiotics quickly and clearly. Enter any health topic and the app instantly queries PubMed to show how often specific probiotic genus and species appear in published research related to your search term. Results are presented in a simple list with study counts, letting you explore evidence directly from PubMed. Features • Provides information to help make decisions on which products you may want • Search PubMed by health topic • View probiotic genus and species study counts • Tap any result to open the corresponding PubMed search • Save result sets for later reference • Clean, distraction-free interface • No accounts or sign-in required This app does not provide medical advice, diagnosis, or treatment recommendations. It is an educational research tool designed to make scientific literature more accessible. Who it’s for • Researchers • Students • Healthcare professionals • Curious readers exploring scientific literature Data & Privacy The app does not collect personal data. Searches are sent directly to PubMed and your private backend server to retrieve public research information. Disclaimer Probiotic Search is for informational and educational purposes only. Always consult qualified professionals for medical or healthcare decisions. Developed by Mark Brudnak PhD, microbiology researcher and author.
Written user reviews are not shown here. Check current App Store reviews >
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
Redux
Axios
React Navigation
Shadcn/UI
BUILD KIT DIFFICULTY
Intermediate
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.
