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
Day Counter - Time of X
Track the time since the moments that matter, and count down to the ones still ahead
$0.99
PRICE
$0.99
No 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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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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 Day Counter - Time of X: 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
Allow users to choose from a wider range of colors or patterns.
Assumption to check: Limited customization for event colors
Validate with people who use this workflow before building.
Hypothesis 2
Implement push notifications for upcoming events.
Assumption to check: Lack of reminders for upcoming events
Validate with people who use this workflow before building.
Hypothesis 3
Introduce categories or tags for better organization.
Assumption to check: No option to categorize events
Validate with people who use this workflow before building.
Hypothesis 4
Enhance UI/UX to make it more visually appealing and interactive.
Assumption to check: Simple design may lack engagement
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
Track the time since the moments that matter, and count down to the ones still ahead. Start in seconds with presets for birthdays, anniversaries, weddings, trips, due dates, sobriety, new jobs, or anything custom. Pay once. No subscriptions. No ads. Time of X follows both elapsed and remaining time in real time, with years, months, days, hours, minutes, and seconds in one clean counter. Available on iPhone, iPad, Apple Watch, your Lock Screen, and Home Screen. How many days have you been alive? How long since your wedding day? How many days until your next anniversary, due date, or trip you can't wait for? Use fully editable quick-start presets for Birthday, Anniversary, Together since, Wedding, Trip, Due date, Sobriety, New job, or Custom. Then check your milestone from your Home Screen, Lock Screen, Apple Watch, or by asking Siri. iCloud sync keeps everything in step across iPhone and iPad. FEATURES • Live counter for time since or until any milestone • Countdown support for upcoming birthdays, anniversaries, and special dates • Quick-start presets with fully editable dates and settings • Optional reminders for upcoming milestones • Six time units: years, months, days, hours, minutes, and seconds • Detailed breakdown for the full picture at a glance • Multiple milestones, each tracked independently • Home Screen widgets in small, medium, and large sizes • Lock Screen and accessory widgets with elapsed and countdown views • Different widgets can follow different milestones • Siri Shortcuts for milestone time, full breakdowns, and quick open • iCloud sync across iPhone and iPad • Share Cards for saving and sharing milestone moments • Apple Watch app • Smooth animations, clean design, and full VoiceOver accessibility MOMENTS TO TRACK Track how long you've been married, alive, or sober. Watch your child's first thousand days. Count down to a birthday, anniversary, due date, vacation, or any moment you're waiting for. Glance at a widget on your Lock Screen and smile a little. Ask Siri for an update, or open the app to see both how far you've come and how much is still ahead. A one-time purchase. Yours forever. No subscriptions, no ads, no tracking, no upsells. Just the dates that matter to you, beautifully kept.
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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
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@react-native-community/datetimepicker
TypeScript
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.
