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.
Amount is the most intuitive, lightweight and easy to use unit converter you've ever seen
$0.59 · 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 Amount - Unit Converter: 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 unit options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: User interface feels dated
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent performance on older devices
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited free features
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.
Amount is the most intuitive, lightweight and easy to use unit converter you've ever seen. Amount let you convert units in a way you've never seen before: with just two tap of your finger you have all the results you're looking for in a single display, side by side. When you use Amount you don't have to think what are number is and choose from a long list of values which unit assign to it, spending time. Just let it do all the stuff! FEATURES • Incredibly lightweight, fast and easy to use. • Simple graphic and intuitive interface. • Over 700 units across more than 30 categories. • Real time conversions in one screen. • Create your own customized lists. You can change the order as you like and select just the units you want to see. • View your conversion history log (the history keeps even old exchange rates for currencies). • Search feature to let find the unit you want and instantly convert it. • Custom units can be added easily for each category. Categories Amount can handle: Acceleration, Angles, Area, Clothing (men and women), Cooking, Currency, Data, Density, Electric current, Energy, Flow (mass and volume), Force, Frequency, Fuel Consumption, Illuminance, Length/Distance, Luminance, Metric System, Network speed, Power, Pressure, Radiation, Speed, Temperature, Time, Torque, Typography, Viscosity (dynamic and kinematic), Volume and Weight/Mass. TIPS • Move between screens using swipe gestures. • Long press any category or unit to see more options. • Shake the device to change the sorting of category or units (only on iPhone). • You can change the number directly in the conversion screen by simply tapping it. ADDITIONAL INFO To convert currencies is required an internet connection. Currency and clothing size information are provided only for informational purposes. If you're going to download Amount, please rate and leave a comment! And if you have a suggestion don't hesitate to contact me. With your help I can improve Amount even more!
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.