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
Period Tracker: P Forest
Thank you for supporting my commitment to zero data collection.
$2.99
PRICE
$2.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 ratings · Top 5%
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.
Build your own version
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 Period Tracker: P Forest: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Thank you for supporting my commitment to zero data collection. What’s New ● User Request! New Autumn/Winter icons: Switch up your look with cozy seasonal vibes. ● User Request! New charts for cycle length & body temperature: Track cycle regularity and physical changes at a glance. ● User Request! More background & button colors: Added extra lovely, dreamy color options alongside original choices. ● Manual backup support: In addition to original iCloud auto-backup, manual backup is now supported for more flexibility and peace of mind! ● Pregnancy Mode: Embark on a 40-week forest journey with heartwarming weekly quotes for moms-to-be. ● Smart Tracking: Automatically merges spotting into a single cycle for better accuracy. ● Effortless Logging: A simplified workflow—track your status in a single tap. ● Privacy & Style: Secure your data with a Passcode Lock and enjoy our new high-quality pixel icons. Highlights ● Living Pixel Forest: Watch your forest evolve with your cycle, offering comfort and charm. ● Personalized Themes: Choose from a variety of "Soft Creamy" palettes to match your mood. ● Your Data, Your Privacy: No accounts, no servers. Your data stays safely on your device and iCloud. A Note from the Developer As an indie developer, I created this forest to be a quiet sanctuary. Unlike big corporate apps, this is a personal space designed with love and privacy at its heart. Thank you for supporting my work!
Written user reviews are not shown here. Check current App Store reviews >
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
Incorporate charts and graphs to analyze cycles over time.
Assumption to check: Limited data visualization options for trends
Validate with people who use this workflow before building.
Hypothesis 2
Create a guided onboarding process with tooltips.
Assumption to check: User onboarding can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to create custom symptoms and categories.
Assumption to check: Lack of customization for symptom logging
Validate with people who use this workflow before building.
Hypothesis 4
Add push notifications for cycle events and symptom logging.
Assumption to check: No reminders for cycle tracking
Validate with people who use this workflow before building.
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.
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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.
