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.
Learn anatomy and biology in an interactive model of the human body — the heart beats, guts gurgle, lungs breathe, the skin feels, and eyes see
$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 The Human Body by Tinybop: 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 compared to expectations.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: High price point may deter users.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Complex navigation structure can confuse users.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchases can be unclear in value.
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.
Learn anatomy and biology in an interactive model of the human body — the heart beats, guts gurgle, lungs breathe, the skin feels, and eyes see. *** Children’s Technology Review Editor’s Choice *** *** KAPI Best App for Older Children *** *** Parents Magazine Best App for Families *** *** Winner - Digital Ehon Award 2020 *** *** 2022 American Library Association’s Notable Children’s Digital Media *** The Human Body is No. 1 in Tinybop’s Explorer’s Library. Each Explorer’s Library app lets kids explore the invisible and awesome wonders of STEM. Kids (and kids at heart!) ages 4+ develop foundational science literacy. The Human Body has been downloaded more than 9 million times and has reached the #1 spot on the App Store’s education charts in 144 countries. “The sound effects are both hilarious and compelling—the pulsing swoosh of the heart pumping is soothing, but the gassy squeaks coming from the digestive system are enough to send my kids into a fit of giggles.” — COOL MOM TECH “What it all amounts to is a circuitous, engrossing tour through the human body—one that’s completely self-guided and unique to every user.” — WIRED Features + Explore eight interactive systems to learn human anatomy, including the skeletal, muscular, nervous, circulatory, respiratory, digestive, immune, and integumentary (skin) systems. + Discover detailed, interactive models of the heart, brain, eye, stomach, mouth, and much more. + Get the urogenital system as an in-app purchase. + Feed the body, make it run and breathe, assemble and pull apart a skeleton, see how the eye sees, watch sound vibrations travel through the ear canal, and more. + Learn new vocabulary with text labels in 50+ languages. + Create a dashboard to change languages, delete accounts, and support your kids’ learning. + Intuitive, safe, and kid-friendly design. + Multi-user system: each child can choose and name their own avatar. + Original artwork and sound design. + Fun for the whole family—play together, learn together. + No rules or levels—curiosity is rewarded. FREE handbook Our expert-reviewed handbook is full of facts, interaction hints, and discussion questions to support learning in this app, in the classroom or at home. Download in your app or at: http://tinybop.com/handbooks. Privacy Policy We take your and your child’s privacy very seriously. We do not collect or share personal information about your child, nor do we allow any third-party advertising. When the camera, microphone, and other services are used within an app, your information is neither collected nor distributed outside of the app. Read our complete privacy policy at tinybop.com. Tinybop, Inc. is a Brooklyn-based studio of designers, engineers, and artists. We make toys for tomorrow. We’re all over the internet. Visit us: www.tinybop.com Follow us: twitter.com/tinybop Like us: facebook.com/tinybop Peek behind the scenes: instagram.com/tinybop We love hearing your stories! If you have ideas, or something isn’t working as you expect it to, please contact us: [email protected]. Psst! It's not Tiny Bop, Tiny Bob, or Tiny Pop. It's Tinybop. :)
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.