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.
Yonks is a day counter app for past and future events, you would like to remember.
$1.99 · In-app purchases
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.
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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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Yonks – Day Counter: map the core Productivity workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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
Assumption to check: Limited customization options for counters.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No reminders or notifications for events.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social sharing features.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No cloud sync option.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Yonks is a day counter app for past and future events, you would like to remember. Ever wondered how many days have been passed since you were born or since you've been married? How many weeks are left until your next vacation starts or a project must be finished? Are you counting the days since you've started your diet, daily workout or quit smoking? How many hours until a highly anticipated movie opens or the new awesome video game will be released? Yonks (British slang for "a long time") helps you to keep track of all of these dates and their notable milestones. :) KEY FEATURES - Fully customizable counters: Choose between counting minutes, hours, days, weeks, months or years and select a custom emoji and color for every counter. - Milestones: See when a notable milestone occurs (e.g. "When is your 1000 day anniversary?") and add it to your calendar. - Sortable lists: Order your counters manually, alphabetically, increasing or decreasing by date or by color. - Notes: Need to remember more than just a date? No problem, just add a custom note to your counter. - Suggestions: No idea what to add? Yonks has a growing list of popular counters from a variety of categories (holidays, history, sports, movies, games, ...) for you to add with one tap. - Customizable date and time formats: Just change the date, time and number formats according to your personal preferences.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.