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
Coloring Watch
****Featured by Apple in "Must-Have Apple Watch Apps" and "Our Favorite Apple Watch Apps" collections****
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
1,200 ratings · Top 30%
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 included17 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.
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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 Coloring Watch: map the core Entertainment 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
Offer a wider variety of images to color.
Assumption to check: Limited image selection options
Validate with people who use this workflow before building.
Hypothesis 2
Integrate more social features for sharing artworks.
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the pricing structure and explain benefits of each tier.
Assumption to check: Subscription model can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Optimize app for lower processing power and memory usage.
Assumption to check: Performance issues on older devices
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
****Featured by Apple in "Must-Have Apple Watch Apps" and "Our Favorite Apple Watch Apps" collections**** Coloring is a great way to calm down and relieve stress. Experience the relaxing effects of coloring directly on your Apple Watch and iPhone. Originally designed exclusively for Apple Watch, Coloring Watch gives you a full coloring experience on your Apple Watch. Latest update brings this totally unique coloring app also on your iPhone! Now you can use both devices, Watch and Phone to color over 200 images. ***MAIN FEATURES*** **One-time payment - No in-app purchases - All image updates for free** **Color over 200+ images on your Apple Watch and iPhone** -Animated and still images -100 colors to choose from -New image updates for free -Create your personal "favorites" gallery on your Phone **Your progress is automatically stored and you can continue your coloring anytime on Apple Watch and iPhone** **Share your creations and create unique Watch Faces** -Tap image on your iPhone and open the menu to share your creations to the world -Share menu also contains a “Create Watch Face” button that lets you create unique Watch Faces on your Apple Watch -Set your favorite coloring image as a complication on the following watch faces: Infograph, Infograph Modular, Meridian, California, Modular Compact and X-Large -Please note that the supported complications are only available on Series 4 and later device **Choose the Phone Coloring Mode** -You can choose between 2 modes: -Watch-like mode: Image parts are selected linearly. Tap RIGHT side of the image to select the NEXT part / LEFT side to select the PREVIOUS part -Direct Tap mode: Tap the part of the image you want to color **Accessibility for all - Voice Control support** -Turn on the Voice Control mode in the Coloring Watch settings and you're able to color images with voice commands. -NOTE: Voice control must also be enabled in your phone settings: Settings > Accessibility > Voice Control **Mindful Minutes (OPTIONAL FEATURE)** -You are able to track your heart rate during coloring by starting a 5 minute Coloring Session on your Apple Watch -After completing Coloring Sessions, examine changes in your heart rate during the session -Coloring Sessions can be started by opening the app menu on Watch (swipe to open the menu) -Coloring Sessions are stored as Mindful Minutes into HealthKit and contribute to your Mindful Minutes in your Health app -Coloring Session requires access to your HealthKit ***Privacy*** -In order to start optional Coloring Sessions that track your heart rate, Coloring Watch needs access to your Heart Rate and Mindful Minutes data in HealthKit -Your personal data used by Coloring Watch is only stored and used locally on your devices and is never shared with third parties ***What to do if Coloring Watch does not appear on your Apple Watch*** -Download Coloring Watch directly from the App Store on your Apple Watch If you have any questions we will happily help you: [email protected] HAPPY COLORING!
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
Expo
Supabase
react-navigation
expo-image-picker
@supabase/supabase-js
BUILD KIT DIFFICULTY
Intermediate
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.
