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.
Team up with legendary Marvel heroes like Spider-Man, Iron Man, Hulk, Black Panther, and more! Kids aged 2-6 will enjoy fun and educational adventures with cool characters and vehicles in LEGO® DUPLO® Marvel.
Free · 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.
Kit ready. Verify your email to download it.
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 LEGO® DUPLO® MARVEL: 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 content for free users
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Slow loading times for media
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchase prompts can be intrusive
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of parental controls
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.
Team up with legendary Marvel heroes like Spider-Man, Iron Man, Hulk, Black Panther, and more! Kids aged 2-6 will enjoy fun and educational adventures with cool characters and vehicles in LEGO® DUPLO® Marvel. • Playful learning with Marvel characters • Open-ended pretend play, perfect for young kids • Shoot webs with Spidey or rescue a cat with Captain America! • Problem-solving challenges • Build with colorful 3D LEGO DUPLO bricks • Fun and heroic surprises around every corner • Share your passion for Marvel with your kids! When young children have fun and play, it creates the perfect conditions to learn and grow. We have designed this app to help young kids develop a balance of the IQ skills (cognitive and creative) and EQ skills (social and emotional) they need for the best start in life. CHARACTERS Spider-Man, Miles Morales, Ghost-Spider, The Avengers, Iron Man, Hulk, Black Panther, Captain America, Ms. Marvel, Green Goblin, Doc Ock, Electro, and more. Adventures await with Marvel heroes and villains! • Kidscreen Awards 2023 - Nominated for Best Game App • Licensing International Award Finalist 2022 • Mom’s Choice – Gold Winner 2022 FEATURES • Safe and age-appropriate • Designed responsibly to let your child enjoy screen time while developing healthy digital habits at a young age • FTC Approved COPPA Safe Harbor Certification by Privo. • Play pre-downloaded content offline without wifi or internet • Regular updates with new content • Apple Family Sharing for easy subscription sharing with other family members • No third-party advertising • No in-app purchases for subscribers SUPPORT For any questions or assistance, please reach out to us at [email protected]. ABOUT STORYTOYS Our mission is to bring the world's most popular characters, worlds, and stories to life for children. We make apps for kids that engage them in well-rounded activities designed to help them learn, play, and grow. Parents can enjoy peace of mind knowing their kids are learning and having fun at the same time. PRIVACY & TERMS StoryToys takes children's privacy seriously and ensures that its apps comply with privacy laws, including the Child Online Privacy Protection Act (COPPA). If you would like to learn more about the information we collect and how we use it, please visit our privacy policy at https://storytoys.com/privacy. Read our terms of use here: https://storytoys.com/terms/ SUBSCRIPTION & IN-APP PURCHASES This app contains sample content that is free to play. However, LOTS MORE fun and entertaining games and activities are available. You can buy individual units of content via in-app purchases. Alternatively, if you subscribe to the app you can play with EVERYTHING. We regularly add new stuff, so subscribed users will enjoy ever-expanding play opportunities. • Subscriptions are billed monthly or annually according to the rate of the selected subscription plan. • You can change your mind at any point. Cancelling can be done through your iTunes settings. • Your subscription will auto-renew at the cost of the chosen package unless you cancel it 24 hours before the end of the current subscription period. Subscription fees are charged to your iTunes account. • After purchase, you can manage your subscription and turn off auto-renewal by going to your Account Settings. • When you purchase a subscription, you forfeit any unused portion of a free trial period. • You can use your subscription on any device registered with the same Apple ID that you subscribed from. LEGO®, DUPLO®, the LEGO logo, and the DUPLO logo are trademarks and/or copyrights of the LEGO® Group. ©2026 The LEGO Group. All Rights Reserved. ©2026 MARVEL
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.