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
Simple Birthday Tracker Diary
Rediscover the joy of birthdays with Simple Birthday Tracker Diary, a dedicated iOS app for tracking and celebrating the special days of your family, friends, and colleagues
$0.99 · In-app purchases
PRICE
$0.99
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 included14 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 Simple Birthday Tracker Diary: map the core Lifestyle 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
Allow users to set custom reminder times and repeat frequencies.
Assumption to check: Limited customization options for reminders
Validate with people who use this workflow before building.
Hypothesis 2
Integrate sharing options for birthdays via social media or messaging.
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Add features like birthday wishes or gift suggestions.
Assumption to check: Lack of user engagement features
Validate with people who use this workflow before building.
Hypothesis 4
Implement cloud sync for user data to prevent loss.
Assumption to check: No backup or sync options
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
Rediscover the joy of birthdays with Simple Birthday Tracker Diary, a dedicated iOS app for tracking and celebrating the special days of your family, friends, and colleagues. Our user-friendly interface presents upcoming birthdays in two distinct sections: 'This Year' and 'Next Year', offering a clear view of every important date. Key features include: Comprehensive Birthday List: Effortlessly add and view birthdays, complete with names, dates, and relationship tags (family, friend, colleague). Real-Time Countdowns: On the main screen, see a dynamic countdown showing how soon each birthday is approaching. Gift Management: Track your gift ideas and purchases with a simple toggle, ensuring you're always prepared. Personal Notes: Jot down special details or reminders for each person's birthday. Customizable Birthday Cards: Generate unique birthday cards within the app. Customize with personal greetings and automatically include the recipient's name. Seamless Sharing: Once your card is ready, share it directly to various social platforms with a click. Each feature is designed to enhance your birthday planning, making it easier and more enjoyable to celebrate every milestone. With Simple Birthday Tracker Diary, you'll turn every birthday into an unforgettable event!
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
Supabase
React Navigation
Zustand
React Native Paper
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.
