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
Ductts
ever wonder how often you cry? ductts is your pocket-sized cry tracker built for convenience, speed, and total privacy.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
4 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's included16 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 Ductts: 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
Incorporate social sharing and challenge features.
Assumption to check: Limited social features for motivation and accountability.
Validate with people who use this workflow before building.
Hypothesis 2
Implement AI-driven workout suggestions based on user data.
Assumption to check: Lack of personalized workout recommendations.
Validate with people who use this workflow before building.
Hypothesis 3
Add support for Apple Watch and other health devices for real-time tracking.
Assumption to check: No integration with wearable devices.
Validate with people who use this workflow before building.
Hypothesis 4
Offer a more flexible freemium model for broader user appeal.
Assumption to check: Subscription model may deter casual users.
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
ever wonder how often you cry? ductts is your pocket-sized cry tracker built for convenience, speed, and total privacy. log each cry with a single tap. whether it's a quick tear at a movie or an emotional milestone or a hormonal change, ductts helps you track the frequency, intensity, and triggers of your crying. no guesswork, just honest tracking so you can get real about your emotions. - fast, frictionless logging: open the app and log a cry in seconds. be as detailed (or not) as you'd like. - see your emotional patterns: dive into your stats to spot trends and gain insights into your well-being. - filter your feed: sort by intensity, type of cry, or timeframe. - private by design: your crying data stays on your device. no cloud storage, no accounts, no leaks. - export & import: own your data. export to a spreadsheet for deeper analysis, sharing with a therapist (or friend), or transfer between devices. - ductts is made for anyone who wants to get in touch with their feelings, track their emotional health, or just get curious about their crying habits.
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
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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.
