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.
Help Pettson and Findus build their inventions! In this tricky game you should help building these clever inventions
$4.99 · 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 Pettson's Inventions: map the core Education 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 content after initial purchase
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Occasional bugs in puzzles
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social features for sharing achievements
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Difficulty in navigating between inventions
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.
Help Pettson and Findus build their inventions! In this tricky game you should help building these clever inventions. You need to figure out which ones of the objects should be included and where to put them in the machinery. Please note that the inventions from this game is a part of the inventions in the collection Pettson’s Inventions Deluxe! "It’s our new darling! We keep having to negotiate with the kids for time on the iPad" www.urbanmommies.com "Amazing interface and graphics make this app a must." www.famigo.com "A great puzzle game for families to enjoy together, full of funny animations and encouraging dialogue any kid will enjoy." www.apptudes.com Drag and drop the objects to their right spot and watch the invention start. For every invention finished there will be a reward of a cogwheel. When you have finished all the inventions a special invention will be unlocked where you will help Findus fly out to space! Pettson’s Inventions is a pedagogic app that practices logic and stimulates creativity for preschoolers. - All-in-all there are 27 inventions, some easier, some a bit harder! - Choose to play with or without fake objects to adjust the difficulty level - Choose whether Pettson and Findus should speak English, Swedish or German Do you like Pettson and Findus? There are more games in the App Store where you can meet them: - Pettson’s Memo - Pettson’s Puzzle
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.