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
Gut Harmony: Digestive Tracker
Gut Harmony helps you track your digestive health and manage gut-friendly eating
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.5
2 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/
Preview a sample Build Kit No email needed
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 Gut Harmony: Digestive Tracker: map the core Health & Fitness 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 user experience by integrating a comprehensive food and symptom database.
Assumption to check: Limited food and symptom database
Validate with people who use this workflow before building.
Hypothesis 2
Introduce social features for sharing insights and logs with friends.
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Add reminder notifications to encourage consistent logging.
Assumption to check: No reminders for log entries
Validate with people who use this workflow before building.
Hypothesis 4
Improve the insights screen with more interactive and engaging data visualizations.
Assumption to check: Inconsistent data visualization
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
Gut Harmony helps you track your digestive health and manage gut-friendly eating. Perfect for people with IBS, diverticulitis, or following specialized diets. Features: • Daily symptom tracking - Log severity, triggers, and patterns • Comprehensive food diary - Track meals with nutritional insights • Water intake monitoring - Maintain optimal hydration • Medication tracking - Never miss doses with smart reminders • Gut Health Score - AI-powered wellness rating based on your data • Gut-friendly recipes - Browse meals safe for sensitive stomachs • Custom recipes - Save and share your favorite dishes • Smart meal planning - Plan your week with safe food choices • Shopping list generator - Auto-create lists from meal plans • Data export - Share reports with healthcare providers • Home screen widgets - Quick access to tracking and insights Advanced Analytics: • Symptom pattern recognition • Food trigger identification • Medication adherence tracking • Progress trends and insights Great for managing: • IBS symptoms and flare-ups • Diverticulitis management • General digestive wellness • Medication compliance • Nutritional awareness **Note:** While Gut Harmony provides excellent tracking tools for digestive health, specific FODMAP categorization features are planned for future updates. Always consult healthcare providers for personalized dietary advice. Simple, comprehensive tracking for better gut health. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
react-navigation
axios
expo-chart
react-native-multi-select
BUILD KIT DIFFICULTY
Starter
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.
