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.
21 beautifully animated animals
$3.99 · 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 Petting Zoo by C. Niemann: 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 animal interactions and animations
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: In-app purchase confusion
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of educational content depth
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No social features for sharing experiences
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.
21 beautifully animated animals. Full of surprises, wit and quirky animations! "A wonderful App for all ages!" "Absolutely adorable" — USA TODAY Over 1 million downloads! From acclaimed author and illustrator Christoph Niemann comes this interactive picture book. Swipe and tap the 21 animals and be surprised at how they react. This app combines the charm of hand made animations and Niemann's wry humor with state of the art technology. What would an elephant in your bathroom do? Can a dog breakdance? A storybook app unlike all others! HIGHLIGHTS: • 21 hand-drawn animales with suprising and great animations • Playful, musical sounds for each animal • Fun for all ages, from infants to adults • No english required; animals don't speak english PRAISE: "Moms and dads will likely find that the app’s interface is not just fun for the kids, but also enjoyable for adults as well." — WIRED "Absolutely adorable" — USA TODAY "A Quirky and absolutely charming app" — CNET 5/5 "Fizzing with character, craft, and humor" — THE GUARDIAN "An alligator’s teeth become guitar strings, an octopus’s arms serve as a mandolin. It’s adorable, goofy, and immensely entertaining." — FASTCOMPANY "Possibly the loveliest app you'll download this week/month/year." — CREATIVEREVIEW “Four little thumbs-up in my household for this one.” — KOTTKE "Petting Zoo is one of those rare apps that brings out the kid in all of us." — MACLIFE Please also check out our other great Apps for kids: „NIGHTY NIGHT“ - is the perfect App for a daily go-to-sleep ritual with lovely animals, sweet music and great narration. „LITTLE FOX MUSIC BOX“ – is a sing-along songbook with more than 100 interactive elements in 3 songs and the little fox music studio where you can record your own songs. If you experience any trouble with the App or have any questions or comments, please don't hesitate to contact us any time: [email protected]. We´d love to help you out. Please also mention your device version and your iOS version. Please also visit our website www.foxandsheep.com for more information and support. About Fox & Sheep: We are a Studio in Berlin and develop high quality apps for kids at the age of 2-8 years. We are parents ourselves and work passionately and with a lot of commitment on our products. We work with the best illustrators and animators around the world to create and present the best apps possible – to enrich the lives of our and your kids.
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.