App Overview

The Monster at the End... icon

The Monster at the End...

Sesame Workshop (Apps) · Books

This is an animated storybook app, which will humorously help teach your child about emotions and early reading skills

$4.99 · In-app purchases

PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.6
199 ratings · Top 15%

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.

Build your own version

Build Kit

Make this idea yours

A product spec, screen plans, and build steps for your coding agent.

First kit free with a verified email

Add to a Remix

Combine features and design from your favorite apps.

Kit ready. Verify your email to download it.

What's included18 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
Preview a sample Build Kit No email needed

Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

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.

Screen plan

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.

Differentiate and validate

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.

JavaScript is required to complete mailbox verification.

Free quick prompt For a smaller starting point

Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for The Monster at the End...: map the core Books workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

Preview ready. Verify your email to reveal and copy the full prompt.

JavaScript is required to complete mailbox verification. Return to this prompt preview.

Continue in Rork copies the full prompt to your clipboard first, then opens Rork in a new tab.

Continue in Rork >

Affiliate link: CloneChart may earn a commission at no extra cost

Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

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

Implement a subscription model for new stories.

Assumption to check: Lack of engaging content updates.

Validate with people who use this workflow before building.

Hypothesis 2

Add more interactive elements, such as games or quizzes related to stories.

Assumption to check: Limited interactivity.

Validate with people who use this workflow before building.

Hypothesis 3

Provide clear explanations for what is premium content.

Assumption to check: In-app purchase confusion.

Validate with people who use this workflow before building.

Hypothesis 4

Ensure 'Restore Purchases' button is prominent and functional.

Assumption to check: Difficulty in restoring purchases.

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

This is an animated storybook app, which will humorously help teach your child about emotions and early reading skills. The best-selling classic becomes an interactive storybook! ** Reached No. 1 in Books on the App Store! ** ** Winner of Cynopsis Kids Imagination Award – Best Preschool App! ** ** Winner of Cybils Award—first Book App award winner! ** ** Common Sense Media 5-Star Quality Rating ** “Emotional expression, humor, built-in vocabulary, and interactivity help kids learn throughout this story.” – Common Sense Media The Monster at the End of This Book enhances the classic Sesame Street book with completely immersive experiences that make children part of the story. Join lovable, furry old Grover as he tries his very hardest to tie down pages and build brick walls—all to keep readers away from the monster at the end of this book. Families can share this giggle-filled story together in a brand-new way that children will ask to read again and again. The Monster at the End of This Book is a truly enchanting reading experience for kids—and monsters—of all ages. FEATURES • Lively, interactive animation that responds to your child’s touch • Narration by lovable old Grover himself—tapping Grover makes him talk! • Engaging activities that empower readers to decide how and when to move the story forward—plus encourage kids’ spatial development and listening skills • Word highlighting to help build beginning reader skills • Easy-to-follow parent tips for helping kids tackle common fears and label emotions • Bookplate personalization—add your child's name! ABOUT US Sesame Workshop’s mission is to use the educational power of media to help kids everywhere grow smarter, stronger, and kinder. Delivered through a variety of platforms, including television programs, digital experiences, books and community engagement, its research-based programs are tailored to the needs of the communities and countries they serve. Learn more at www.sesameworkshop.org. PRIVACY POLICY The Privacy Policy can be found here: http://www.sesameworkshop.org/privacy-policy/ CONTACT US Your input is very important to us. If you have any questions, comments, or need help, please contact us at: [email protected].

Written user reviews are not shown here. Check current App Store reviews >

Screenshots

< Scroll to see more >

Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

SUGGESTED BUILD STACK
React Native
Expo
TypeScript
React Navigation
Supabase
Zustand
BUILD KIT DIFFICULTY
Intermediate

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.