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.
Over 4 million downloads! The FASTEST way possible to convert units
$9.99 · 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.
First kit free with a verified email
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 Convert Any Unit: map the core Travel 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 unit types available for conversion
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No offline functionality
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lacks a history of conversions
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No customization options for users
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.
Over 4 million downloads! The FASTEST way possible to convert units. Just type in a unit without first selecting the category. As you type, a list of units appear. Tap a unit to select it. For most units, 1 or 2 letters is enough to find the unit you want. Automatically saves units into a Favorites list. ----- As you type, the most likely units appear. Once you have selected a unit, the other unit is automatically restricted to the category of the current unit. At any time you can browse through the complete list of units available by tapping on the buttons to the right of the input fields. Advanced features include bookmarks and an integrated calculator. With over 6,400 units, this is the only unit converter you will ever need. ----- Streamlined Interface • Search for and select units with autocomplete (as you type, a list of matching units appears). • Search faster by typing in only the unit abbreviation or first letter of each word in the unit. • "Intelligent Search" shows the most likely units first. • Automatic category selection (category is automatically set once you select a unit). • Flip Units button to switch the From and To units. • Reset button to clear all inputs and start over. • Convert to fraction. ----- Advanced Features • Built in calculator. • Save bookmarks and organize them into folders. • Equations are shown for temperature conversions. • Copy and paste to and from the clipboard. • Conversion result is shown as an easy to understand equation. • Both unit names and symbols shown. • Browse units in an alphabetically indexed list or by magnitude. • Results with up to 12 significant digits. • Automatic formatting of numbers based on your current Region Format. • Automatic formatting of extremely large or small numbers with scientific notation. ----- Over 6,400 Units In 53 Categories. • Acceleration • Angle • Area • Blood Cholesterol • Blood Glucose • Capacitance • Currency • Currency / Volume • Data • Data Rate • Density • Dynamic Viscosity • Electric Charge • Electric Current • Electric Potential • Electrical Conductance • Electrical Resistance • Energy • Force • Frequency • Fuel Economy • Illuminance • Inductance • Kinematic Viscosity • Length • Luminance • Magnetic Field Intensity • Magnetic Flux • Magnetic Flux Density • Mass • Mass / Area • Mass Flow • Mass Fraction • Mass Moment of Inertia • Mole Fraction • Numeral Systems • Pace (Speed) • Power • Pressure • Radiation - Absorbed Dose • Radiation - Equivalent Dose • Radiation Rate - Equivalent Dose • Radioactivity • Sound • Speed • Temperature • Time • Torque • Volume • Volume / Area • Volume Flow • Volume Flow / Area • Water Hardness • Weight (Mass) • Wire Gauge URL Scheme: convertanyunit://
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.