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.
Improve your posture and move with more ease in just 21 days.
$3.99 · 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 Posturist: 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 often find tracking their progress cumbersome and not engaging.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Exercise instructions are often unclear in similar apps.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of personalized exercise recommendations based on user data.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchase structures 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.
Improve your posture and move with more ease in just 21 days. Who Am I? I am Emir Eryiğit. I have been a fitness trainer for 12 years, focusing especially on posture, postural disorders, and spinal health. By working one-on-one with hundreds of people, I have specialized in common posture issues such as forward head posture, kyphosis (hunchback), and lower back problems. My Certifications TVGFBF Level 2 Fitness Trainer EREPS Level 4 Registered Trainer Posture Analysis & Alignment trainings What Is This Program Based On? The exercises in this app were not selected randomly. They are based on a systematic approach that has delivered the most effective results throughout my years of working with clients: • Spinal alignment • Muscle balance • Mobility and stability • Core, glute, and back activation • Movement awareness Every exercise you do here is a refined result of real experience and hands-on practice. Posturist helps you build better posture through simple, guided daily exercises designed for real life, whether you're sitting at a desk, working from home, or staying active. Feel more aligned, more aware of your body, and more confident in how you sit, stand, and move. What you’ll get: • 21-day structured posture program • Short, easy-to-follow daily exercises • Step-by-step guidance for every movement • Focus on alignment, mobility, and body awareness • Designed for busy, real-life routines • No equipment needed Why people love Posturist: • Fits into your daily routine • Helps you stay consistent • Suitable for all levels • Track your daily progress Build better habits, improve your posture awareness, and support your body — one day at a time. Start your 21-day posture journey today.
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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.