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
Migraine Tracker – MigraLog
Migraine Tracker – MigraLog helps you keep a clearer record of how migraines show up day to day.
$3.99 · In-app purchases
PRICE
$3.99
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included15 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 Migraine Tracker – MigraLog: 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
Implement more visual insights and personalized tips based on logs.
Assumption to check: Users find it difficult to track and analyze triggers effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Add HealthKit/Google Fit integration for better tracking.
Assumption to check: Limited integration with health apps for data sharing.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to create custom tags and notes for each log.
Assumption to check: Users desire more customization options for logging migraines.
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate community features to allow users to share tips and experiences.
Assumption to check: The app lacks social features for sharing experiences.
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
Migraine Tracker – MigraLog helps you keep a clearer record of how migraines show up day to day. Log episodes in seconds, track likely triggers and symptoms, note medications, and review simple patterns over time without turning your phone into a complicated medical system. With MigraLog, you can: - log migraine episodes with timing, severity, aura, symptoms, triggers, medications, and notes - review your recent history in one clear timeline - spot simple patterns across the last 30 days - set a gentle daily reminder to stay consistent - export a doctor-ready summary for appointments - keep your data private with local-first storage and backup support Migraine Tracker – MigraLog is designed for personal tracking and reflection. It does not provide diagnosis, treatment advice, or medical guidance.
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/native
axios
react-native-chart-kit
zustand
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.
