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.
Winner of the 2018 Children's BAFTA for best Interactive
$2.99
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.
Your first Build Kit is free with a verified email.
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 Hey Duggee: The Counting Badge: 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 interactive content may not keep children's attention.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of progress tracking features may disengage parents.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Static animations may feel repetitive.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No social features for sharing achievements.
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.
Winner of the 2018 Children's BAFTA for best Interactive * As seen on Nick Jr.* Numbers made fun, with Hey Duggee’s first educational app: The Counting Badge. Safe ad-free content for your little ones. The Counting Badge has been designed with Early Years Foundation Stage learning outcomes at its core. Featuring a diverse mix of engaging counting tasks, with automatically adjusting difficulty levels, the game caters for Duggee fans of all ages. Start by remembering which day of the week it is and picking what the weather looks like outside - then move swiftly on to some Early Years brain training! There are nine counting tasks to practice, each with four variations. That's 36 different activities to keep content fresh, while three levels of difficulty ensure that little minds will stay entertained and engaged for longer. • Tap tadpoles one-by-one, counting up as you go. Keep practising with bubbles, apples and ducks. • Pick which of the two groups of spiders matches the number shown on screen. Have another go with the frogs, worms or snails. • Count bees as you catch them and place them back in their hive. You'll also need to round up the cows, the chickens and the crows. • Put the snakes in order, from smallest to biggest. Practice makes perfect, so keep trying with some socks, totem poles and test tubes. • Sort the toucans from the flamingos by placing them in the correct paddling pool. There's plenty more sorting to do with bugs, pizza toppings and clubhouse toys. • Count the alligators every time they raise their heads above the water. See if you can perfect your reaction times with rabbits, monkeys and mice. • Decide whether there are more tulips or daisies in the field of flowers. Keep working out ‘which is more,’ with bugs, balloons and Jazz Fish. • Identify the number that shows how many ants are holding up the hotdog. You'll also need to choose the correct number of penguins, rabbits and birds. • And finally, as an early introduction to adding up, work out how many penguins are missing from the iceberg. You’ll need to do some more sums by deciding on the missing number of sandwiches, bananas and birds. Playing through five activities will earn the player a Gold Star and every fourth star will see Duggee award them their Counting Badge. Profiles for up to three players can be saved, allowing your little ones to pick up exactly where they left off each time they return to the app. So what are you waiting for? Let’s get counting! Key Features: • Counting tasks chosen based on Early Years numeracy learning objectives • Designed to cover the varying abilities of the 2 to 6 year old range. • Encourages player recognition of days of the week, dates in the month and the weather outside. • 36 counting screens keep content fresh and maximise the duration of engagement (9x mechanics each with 4x variations) • Stored player profiles regulate difficulty progression for each counting mechanic (3x difficulty levels) • Gold star collection mechanic plus daily award of the Counting Badge encourages repeat plays Customer Care: If you experience any technical issues with this app please get in touch. Most issues can be easily fixed and we are happy to help. Contact us at [email protected] Privacy: This app will ask for permission to access your device's camera. This app does not collect or store any personal data from your device. View our privacy policy here: www.bbcworldwide.com/home/mobile-apps/ About Studio AKA: STUDIO AKA is a multi-BAFTA winning & Oscar-nominated independent animation studio & production company based in London. They are known internationally for their idiosyncratic & innovative work expressed across an eclectic range of projects. www.studioaka.co.uk About Scary Beasties: Scary Beasties is a mobile and online games designer and developer specialising in kids’ content, from pre-school through to the teen market. www.scarybeasties.com A Scary Beasties production for BBC Worldwide
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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.
Not assessed in a Build Kit yet.
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.