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
Plank for Watch
Elevate your core training experience with Plank for Watch, the ultimate 4-Minute Core Training Program designed exclusively for the Apple Watch
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
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/
Preview a sample Build Kit No email needed
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.
JavaScript is required to complete mailbox verification.
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 Plank for Watch: 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.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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
Include features that allow users to set reminders for workouts and share achievements with friends.
Assumption to check: Lack of user engagement features like reminders or social sharing
Validate with people who use this workflow before building.
Hypothesis 2
Expand workouts to include variations and additional exercises for a more comprehensive fitness experience.
Assumption to check: Limited workout variety focused only on planks
Validate with people who use this workflow before building.
Hypothesis 3
Integrate with Apple Health or Google Fit to track user progress alongside other health metrics.
Assumption to check: No integration with health tracking services
Validate with people who use this workflow before building.
Hypothesis 4
Enhance UI with more engaging graphics and animations for a more appealing user experience.
Assumption to check: Basic design and user interface
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
Elevate your core training experience with Plank for Watch, the ultimate 4-Minute Core Training Program designed exclusively for the Apple Watch. Commit to a transformative 5-week journey of strength-building exercises that progressively challenge your core and enhance your endurance. Key Features: Structured 5-week program: Engage in 5 days of exercise each week, featuring a variety of plank exercises and core workouts meticulously designed to elevate your fitness level. Progressive intensity: Watch as your strength improves over time with exercises that gradually increase in difficulty, pushing your limits and maximizing your results. Quick and effective: With just 4 minutes per session, our program offers a time-efficient solution for integrating fitness into your daily routine, perfect for those with busy schedules. Apple Watch integration: Seamlessly track your progress and follow guided exercises directly from your wrist, making it easier than ever to stay committed to your fitness goals. Bodybuilding benefits: Strengthen your core, improve stability, and enhance overall body strength with exercises tailored for lasting results. Endurance enhancement: Build stamina and resilience as you progress through each week, unlocking newfound levels of endurance to conquer your fitness aspirations. Transform your Apple Watch into a powerful training companion and experience the ultimate core workout with Plank for Watch. Start your journey to a stronger, fitter you today!
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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
Expo
Victory Native
React Navigation
React Native Async Storage
Expo AV
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.
