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 Plus is an enhanced version of the multi award winning unit conversion app Amount.
$0.90 · 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 Plus - 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 categories compared to other converters.
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: Ads in free version can be annoying.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Slow response time for conversions.
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 Plus is an enhanced version of the multi award winning unit conversion app Amount. Amount Plus improves every aspect of the predecessor by adding more advanced features to increase your productivity without sacrificing its famous simplicity. With a new gorgeous user interface and unrivaled customization features Amount Plus gives you the ability to convert everything you need just the way you like! FEATURES • Converts units faster than before; • Has over 700 units across more than 30 categories; • Offers new ways to search, filter, convert and compare units; • Allows the creation of shortcuts for incredibly fast conversions; • Completely customizable at user needs; • Custom units can be easily added for each category; • Supports Today widget extension to quickly access your favorite conversions; • Supports Apple Watch to convert units directly on your wrist; Categories Amount Plus can handle: Acceleration, Angles, Area, Astronomical, Clothing (men and women), Cooking, Currency, Data, Density, Electric current, Energy, Flow (mass and volume), Force, Frequency, Fuel Consumption, Illuminance, Length and Distance, Luminance, Metric System, Network speed, Power, Pressure, Radiation, Sound, Speed, Temperature, Textile Yarn, Time, Torque, Transportation Cost, Typography, Viscosity (dynamic and kinematic), Volume, Weight and Mass. 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 Plus 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 Plus 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.