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.
If I told you this app could:
$4.99
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.
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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.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
If I told you this app could: * Improve your health * Improve your sleep (and therefore your sex life and mood) * Save you $200+ per year on electricity * Pay for itself in days, not years Globally (at scale): * Avoid ~50 TWh of electricity every year * Keep 20+ million tonnes of CO₂ out of the air — more annual emissions than some entire countries and roughly half of Tesla’s total reported customer impact last year * Offsetting a meaningful slice of new data center demand (the AI boom is hungry) • Help keep RU out of UA (energy independence matters) You wouldn’t believe me. But it’s science™, not magic. You’d probably pay way more than $4.99 for all that. You can already do everything this app does yourself. I did it manually for years. But I kept forgetting. Checking temperatures, rain, real-feel, and AQI every day gets tedious. So I automated it with all the edge cases. Here’s how it works: Every day the sun rises in the east and sets in the west. In summer, open when it’s cooler outside than inside. Close when the advantage disappears. In winter, open when it’s warmer outside than inside. Close in the evening. Basic thermodynamics: if it’s colder outside and your house is warmer, opening the windows cools the house for free. Vice versa for gentle heating. Free energy, unlike your HVAC system that costs money to run and service every year. Fresh air when conditions are right feels great and is healthier. You sleep better in a properly cooled or warmed house. The number one fix for low T is sleep. No sleep, and Mr. Happy becomes Mr. Sad. This app handles the timing, notifications, rain checks, real-feel, and AQI so you don’t have to. Widgets for Lock Screen and Home Screen. Watch app too. Why pay $4.99 when you could yell at Alexa or Siri? Because this app actually factors rain, real-feel, and air quality. Alexa and Siri won’t stop you from letting in bad air or rain. Checking forecasts, temperatures, and timing manually is exactly the chore I got tired of. Let the phone do the work. Save money. Sleep better. Help the planet. $4.99 one-time. No subscriptions. Worldwide. Don't believe me? Links to the science™. https://x.com/GrumpyTechBro/status/2078142052601315577?s=20
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.