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.
WomanLog is a period and fertility calendar.
$13.99 · 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.
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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.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for WomanLog Pro Calendar: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
WomanLog is a period and fertility calendar. WomanLog helps you keep information about your period, symptoms, and other data in one place. KEY FEATURES • Period calendar for regular and irregular cycles. • Period, fertile days, and ovulation predictions. • Standard and advanced prediction modes based on previous cycle data and changes in cycle length. • More than 100 symptoms and other data, including weight, basal body temperature (BBT), mood, medication, cervical mucus, notes, and charts. • Reminders for menstruation, ovulation, weight, BBT, vitamins, breast self-exam, medication, contraception, and other events. • Sharing period dates with your partner. • Data synchronization between multiple devices. • Apple Health support for selected data, including weight, BBT, and menstruation. • Apple Watch support. ADDITIONAL FEATURES • Password protection • Pregnancy mode • Menopause mode • Multiple calendars WOMANLOG PRO FEATURES • Cervical mucus records • Cycle Overview with PDF export by email • Notes with time and reminders • Moon phases • Ovulation test • Pregnancy test • Blood pressure and pulse • 30 interface themes • No ads INTELLIGENT ASSISTANT – OPTIONAL SUBSCRIPTION • More detailed prediction of the first day of the next period. • Estimated probability (%) for predicted period start dates. • Estimated probability (%) for fertile days. ABOUT PREDICTIONS Period, ovulation, and fertility predictions are estimates based on the data entered in the app. WomanLog does not provide medical diagnosis or treatment. WomanLog should not be used as a method of contraception. For medical advice, consult a qualified healthcare professional. SUBSCRIPTION INFORMATION • Payment is charged to your Apple Account after purchase confirmation. • The subscription renews automatically unless it is canceled at least 24 hours before the end of the current subscription period. • Your Apple Account is charged for renewal within 24 hours before the end of the current subscription period. • You can manage or cancel your subscription in your App Store account settings. • Any unused part of a free trial period, if offered, may be forfeited when you purchase a subscription. Terms of Use: https://www.womanlog.com/terms_of_use Privacy Policy: https://www.womanlog.com/privacy_policy Contact: [email protected] www.womanlog.com © 2026
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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 the interface cluttered and difficult to navigate.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of customization options for symptoms and notes.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent data syncing across devices.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited integration with other health apps.
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.