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
Body Clock: Chronotype Test
By understanding your body clock (chronotype),
$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.
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A product spec, screen plans, and build steps for your coding agent.
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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 Body Clock: Chronotype Test: map the core Lifestyle 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
Incorporate gamification elements to enhance user engagement.
Assumption to check: Users may find chronotype tests unengaging or repetitive
Validate with people who use this workflow before building.
Hypothesis 2
Provide personalized insights and recommendations based on results.
Assumption to check: Limited feedback on results
Validate with people who use this workflow before building.
Hypothesis 3
Add features to easily share results on social media.
Assumption to check: May lack social sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Implement a clear onboarding process to guide users through the app.
Assumption to check: Potentially confusing navigation
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
By understanding your body clock (chronotype), you can find the best times for focus, rest, and action. This app helps you turn your diagnosis into real, daily behavior. 【About】 Our energy levels, sleepiness, and performance are strongly influenced by our body clock (chronotype). Even if we live similar lives, some people feel sharp in the morning, while others focus better at night. These differences are natural. Based on well-known chronotype concepts, this app analyzes your body clock and shows you when and how to act throughout your day in a simple, practical way. 【Features】 ■ Body Clock (Chronotype) Test Answer a short set of questions to discover your chronotype. We analyze whether you lean toward a morning, intermediate, or evening type and identify your most productive time periods. ■ Time-Based Action Guide Easily see when you are likely to focus best, when to rest, and when to take things more lightly. This app is designed to be useful in daily life—not just a one-time test. ■ Real-Time Advice Get simple action tips based on your current time of day. You can adjust your behavior naturally, without overthinking. ■ Widget Support Check advice for your current time directly from your home screen. Stay in sync with your body clock without opening the app. ■ History Tracking Re-test as your lifestyle changes and review past results. Track how your rhythm evolves over time with ease. Recommended for You If You… ・Want to know your best time to focus ・Want to improve your daily rhythm ・Wonder why mornings feel hard or nights feel clearer ・Want to work or study more efficiently ・Found free tests too basic Designed for Peace of Mind ・No ads ・One-time purchase (no subscriptions) ・No personal information required ※ This app is not intended for medical diagnosis. It is designed to help you understand your body clock and use that knowledge in everyday life. Terms of Use https://doc-hosting.flycricket.io/chronotype-test-terms-of-use/c561e4fe-9000-425b-b2e3-e85b05f6a678/terms Privacy Policy https://doc-hosting.flycricket.io/chronotype-test-privacy-policy/45064810-e890-43f9-b319-c7e97063f29c/privacy
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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
Zustand
React Navigation
@react-native-async-storage/async-storage
react-native-share
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.
