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.
iPeriod® – Period & Cycle Tracking Since 2008
$1.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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.
JavaScript is required to complete mailbox verification.
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for iPeriod 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.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Affiliate link: CloneChart may earn a commission at no extra cost
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
iPeriod® – Period & Cycle Tracking Since 2008 Trusted by millions of women. Beautifully redesigned for today. Since 2008, iPeriod has helped women track their periods, understand their cycles, and recognize patterns in their health. Now beautifully redesigned, iPeriod makes personal health tracking easier and more intuitive than ever. “A must-have Personal Assistant” – MSN “Top iPhone App for Busy Women” – Forbes “Simple yet ingenious” – Popular Science “What’s Hot” – App Store YOUR CYCLE. YOUR HEALTH. YOUR WAY. Whether you're tracking periods, planning for pregnancy, observing fertility signs, or navigating perimenopause, iPeriod helps you record what matters to you. WHY WOMEN CHOOSE iPERIOD • Trusted since 2008, with millions of downloads • Beautifully redesigned Home screen and interactive cycle ring • Intuitive calendar with cycle history and predictions • Easy daily tracking of periods, symptoms, moods, and more • Expanded symptom library, including perimenopause and menopause-related symptoms • Personalized period and fertile-window estimates • Customizable tracking, charts, and reports • Discreet reminders and familiar “iP” app icon TRACK WHAT MATTERS TO YOU Record periods and flow, fertility signs, ovulation information, physical and emotional symptoms, moods, basal body temperature, weight, sleep, activity, and personal notes. Find symptoms quickly with the new search feature, customize your tracking, and explore patterns in your health history over time. A BEAUTIFULLY REDESIGNED EXPERIENCE Explore your cycle with an interactive ring, a clearer calendar, redesigned daily details, easier navigation, and smoother performance. Everything is designed to make tracking feel effortless. PRIVACY YOU CAN TRUST Your health information is your business. • We never sell your private health data • We never share your cycle or symptom history with advertisers or data brokers • Your backed-up health information is encrypted • Password protection helps keep your information secure • You control when to export or share your health reports Your health. Your history. Your choice. SMART, DISCREET REMINDERS Set reminders for upcoming periods, fertile windows, medications, breast self-exams, and personal health needs. Check estimated period dates when planning travel or important events. CHARTS, REPORTS & APPLE HEALTH Explore cycle patterns and past entries with charts and reports. Export PDF reports to review your history or bring to a healthcare appointment. Integrate supported Apple Health information, including menstrual data, activity, weight, and other wellness information. MAKE iPERIOD YOUR OWN Personalize your experience with custom symptoms and moods, flexible settings, and advanced chart options. iPERIOD PREMIUM Enjoy more features while supporting an independent small business. • Ad-free experience • Advanced, customizable charts • Additional symptom and mood customization • Unlimited PDF report exports Choose a monthly or annual subscription. Eligible annual subscribers can try Premium free for 7 days. PDF export is also available as a separate one-time purchase. Since creating iPeriod in 2008, we've remained an independent small business dedicated to thoughtful women's health tools and respecting your privacy. Your support helps us keep improving. IMPORTANT INFORMATION Cycle predictions and fertility estimates are informational only. iPeriod is not a contraceptive method or a substitute for professional medical advice. Privacy Policy: https://iperiod.net/PrivacyPolicyiPeriod.html End User License Agreement: https://iperiod.net/iPeriodEULA.html The iPeriod you know and trust. Beautifully reimagined.
Written user reviews are not shown here. Check current App Store reviews >
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
Assumption to check: Users find it difficult to log symptoms consistently.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited customization for cycle tracking.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of community engagement features.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Inconsistent notifications for period reminders.
Validate with people who use this workflow before building.
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.