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
Tampon Timer - Period Tracker
Tampon Timer – Period Tracker
$1.99 · In-app purchases
PRICE
$1.99
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/
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 Tampon Timer - Period 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
Include social sharing and reminders for logging.
Assumption to check: Limited user engagement features
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to export logs for personal records.
Assumption to check: No data export options
Validate with people who use this workflow before building.
Hypothesis 3
Implement customizable notifications for logging.
Assumption to check: Lack of customizable reminders
Validate with people who use this workflow before building.
Hypothesis 4
Provide advanced cycle statistics and insights.
Assumption to check: Basic analytics
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
Tampon Timer – Period Tracker The smartest period tracker & menstrual product timer — designed for a simple, safe, and reliable cycle experience. Track your period, log symptoms, and monitor tampon/pad/cup usage with smart reminders and clean insights. Period Tracking -Log period dates with one tap -Get personalized cycle predictions -View your full cycle on a simple calendar Tampon / Pad / Cup Timer -Monitor how long you’ve been using each product -Get safety reminders -Reduce uncertainty & stay confident -Reset timers anytime Smart Insights -Understand your average cycle length -Get expected period dates based on your history -Identify patterns across months Extra Features -Custom reminders -Beautiful clean design -No ads, no tracking -Private & secure Download Tampon Timer – the simple, smart, and private way to track your cycle and stay safe with product usage timers. ℹ Terms & Conditions: https://www.notion.so/Terms-Of-Use-2b8ee45ba040802098bdcf5e6450a3da ℹ Privacy Policy: https://www.notion.so/Privacy-Policy-2b8ee45ba04080d0918ed707e15c7915 ℹ Support: [email protected]
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
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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.
