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.
En inglés y español!
$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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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 Ruff's Bone: 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 book selection compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Paywall can be confusing for new users.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Search functionality is basic and lacks filters.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No offline access to downloaded books.
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.
En inglés y español! • A truly unique App that tells the story of Ruff's search for his bone, on Earth and elsewhere! • Winner of a MOM'S CHOICE Gold Award • Winner of a PARENTS' CHOICE Award • Winner of the EDITOR'S CHOICE AWARD from Children's Technology Review • A fully interactive storybook for young and emerging readers • Based on the award winning title originally published by Living Books Review: "Ruff's Bone is an animated interactive storybook that follows Ruff the dog's zany hunt for his bone from the yard next door to another planet and back home again. Almost every object is animated and our kid testers had predictable fun searching for the hidden animated surprise on each page. Tension builds as users try to beat Ruff in finding his bone. This app is based on the gifted Eli Noyes' book of the same title. The developer is to be commended for advancing reading skill development in a well-crafted, extremely intelligent manner." - Jo Hunter ©2013 Parents' Choice Have you ever wished you could play inside a story and really interact with all the characters and words? Now you can! Ruff’s Bone is an imaginative and interactive reading experience with fully animated content loved by children, parents and teachers alike. Wanderful brings every page of this remarkable story to life. Read and play along as the Ruff searches for his bone – from the bottom of the ocean to another planet. Will he find his bone and bring it back to his master? KEY FEATURES: • Interactive storybook in English and Spanish • Change language from any page in the story • 12 fully animated and adventurous pages • Virtually every item on each page comes to life when tapped • All words are “active” for extended word play and language learning – tap on any word to hear it spoken • A hidden animated surprise on each page –can you find Ruff’s bone before he does? • Move between pages with the new scrolling page navigation • Multiple settings to customize the App for your child’s reading experience • Two modes: “Read to Me” and the fully interactive “Let Me Play” • Parental tips to help you get the most out of this Wanderful interactive storybook • Teacher resources include a 32 page overview of Wanderful interactive storybooks Classroom Activities and a free Preview of the Ruff's Bone Classroom Activities guide • The full 66 page Ruff’s Bone Classroom Activities guide is available as a premium in-app upgrade Wanderful’s goal is to bring outstanding interactive storybooks to a new generation of children. We hope Ruff’s Bone provides your family, children and students with hours of story play. Ruff’s Bone is written by Oscar-nominated Eli Noyes, whose work includes projects for Sesame Street, HBO, Scholastic, Nickelodeon, MTV, Pixar, Disney and Oxygen Media. Privacy Disclosure Wanderful creates engaging interactive storybooks for children that are educational, fun, and above all safe and appropriate. This app: • does not collect any information • does not contain ads • contains an in-app purchase • includes active links to websites or social networks, but ONLY from the PARENTS and TEACHERS pages, not from the storybook pages • uses analytics to improve our app experience, and only in aggregate and never with personally identifiable data
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.