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
kegel - black & white
Introducing kegel, the kegel and pelvic floor exercise app that sticks to the barebone basics to turn your daily routine into a fun and rewarding experience!
$0.99 · In-app purchases
PRICE
$0.99
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.
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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 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 kegel - black & white: 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
Add more exercise types and routines.
Assumption to check: Limited exercise variety
Validate with people who use this workflow before building.
Hypothesis 2
Introduce social sharing and challenges.
Assumption to check: No social features
Validate with people who use this workflow before building.
Hypothesis 3
Implement gamification elements and rewards.
Assumption to check: User retention issues
Validate with people who use this workflow before building.
Hypothesis 4
Use user data to suggest tailored workouts.
Assumption to check: No personalized recommendations
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
Introducing kegel, the kegel and pelvic floor exercise app that sticks to the barebone basics to turn your daily routine into a fun and rewarding experience! No hidden costs, no tracking of your data. It all stays on your device! Say hello to a simple and beautiful user interface that makes tracking your progress a breeze. Easily transition from day to night with our visually appealing dark mode, designed to be easy on the eyes and perfect for those late-night workout sessions. kegel allows you to customize your workout parameters, including sets, repetitions, and duration, so you can tailor your routine to fit your unique needs and goals. Never miss a beat with our handy streak tracker that celebrates your dedication to pelvic floor health. Plus, set alerts to ensure you never forget about your daily exercises, because consistency is key! Embark on a fun and exciting journey towards improved pelvic health and wellness! Download kegel now and let's get those pelvic floor muscles in tip-top shape together!
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
React Native
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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.
