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.
have a chompin’ good time with hungry hippo and his pals!
$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 Hungry Hungry Hippos!: map the core Books 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 interactive content and animations.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Subscription fatigue with too many tiers.
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: Lack of social sharing 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.
have a chompin’ good time with hungry hippo and his pals! go on an adventure with hungry hippo, bottomless potamus, sweetie potamus and veggie potamus as they travel through the mountains, the fertile forest, the radiant river and the savanna safari. no journey with the hungry hungry hippos is ever complete without many stops at the watering hole to discover new foods and join in the feeding frenzy. as you go on each adventure with the hippos you will find different food marbles for each meal and explore the different foods and what category they belong to. each food marble you collect gets added to your food info menu collection. sort the food marbles they ate into the correct food groups. you can even test your knowledge of the food groups and help the hippos make a balanced plate. try to help the hippos collect as many foods as you can from each of the food categories – proteins, grains, fruit, vegetables and dairy. once in a while a treat is okay too! are you ready to join in the feeding frenzy? join the hippos to collect food marbles, discover new foods, learn what foods are good for you and create balanced meals. with your help, the hippos will be chomping away. but hurry! you will have to move fast or the marbles may roll back into the watering hole. features: *single player experience *4 original stories – hungry hippos hiking adventure, bottomless’s bottomless buffet, sweeties sweetest birthday party ever and veggie potamus’s savanna safari. *food group menu shows all the foods items collected *over 100 different food marbles to collect! *16 different gobble session activities *16 different food plate sorting activities *challenge mode! 4 activities to test your knowledge of the food categories and help make the hippos a balanced meal. *fun animations *read to me and read it yourself modes *new food marbles to eat and collect each time you read the story to keep you coming back learning goals *early math and numeracy skills, including *counting *sorting, and *grouping *color names and identification *color matching skills *understanding and creating categories *basic food and nutrition skills and knowledge, including *identifying and naming the basic food types *creating balanced meals *developing fine motor skills and coordination about playdate digital playdate digital inc. is a publisher of high-quality, interactive, mobile educational software for children. playdate digital's products nurture children's emerging literacy and creativity skills by turning digital screens into engaging experiences. playdate digital content is built in partnership with some of the world's most trusted global brands for kids. visit us: playdatedigital.com like us: facebook.com/playdatedigital follow us: @playdatedigital watch all our app trailers: youtube.com/playdatedigital1 have questions? we'd love to hear from you! your questions, suggestions and comments are always welcome. contact us 24/7 at [email protected]
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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.