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.
Stop guessing
$6.99 · 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 Flowjo Track Her Cycle: 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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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 cycle tracking apps often lack personalization options.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Many apps do not provide insightful data analysis.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Users desire better integration with health devices.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchase models can be confusing.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Stop guessing. Start understanding. Download Flowjo and become the partner she brags about. Flowjo is the first cycle-tracking app built for boyfriends, husbands, and partners. Instead of leaving you guessing why she's upset or what she needs, Flowjo gives you a clear, phase-by-phase playbook so you can show up as the best version of yourself — every single day of her cycle. HOW IT WORKS Enter her name, her last period start date, and her cycle length. That's it. Flowjo does the rest — automatically calculating which phase she's in and giving you real, actionable guidance. KNOW WHAT PHASE SHE'S IN Her cycle has four distinct phases — Menstrual, Follicular, Ovulation, and Luteal (PMS territory). Each one affects her mood, energy, and needs differently. Flowjo shows you exactly where she is, with a beautiful visual tracker and countdown to her next period. THE PLAYBOOK — YOUR CHEAT CODE For each phase, get specific tips on: • What to DO — thoughtful actions that make her feel supported • What to AVOID — common mistakes that make things worse • What to SAY — the right words for the right moment • GIFT IDEAS — small gestures that go a long way Plus, learn what she's actually feeling in each phase — so you understand the "why" behind her mood. FULL CYCLE CALENDAR See the entire month color-coded by phase. Know what's coming before it arrives. Add her next period to your calendar so you're always prepared. PMS EXPLAINED Not sure what PMS actually is? Flowjo breaks it down — the biology, the symptoms, and most importantly, how you can help. No medical jargon, just real talk. BUILT WITH RESPECT Flowjo is designed to be used with your partner's knowledge. It's not about surveillance — it's about empathy. Every user agrees to use the app respectfully before getting started. NIDDAH MODE for those who observe. WHY SPOUSES LOVE FLOWJO • No more "what did I do wrong?" moments • Know when to bring comfort vs. when to give space • Feel confident instead of confused • She'll notice the difference — trust us
Written user reviews are not shown here. Check current App Store reviews >
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.