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.
Build your own BRIO railway!
$6.99 · 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.
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.
JavaScript is required to complete mailbox verification.
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for BRIO World - Railway: map the core Education 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.
Affiliate link: CloneChart may earn a commission at no extra cost
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 educational content for deeper learning.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficulties in managing multiple user profiles.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchases can be confusing for users.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Performance issues with complex track layouts.
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.
Build your own BRIO railway! In this app you can build your own railway with all the classic parts from the world of BRIO. You can lay down tracks, place stations and figures, combine your own train sets and travel out to solve missions in an amazing train world. The app stimulates creative play where kids can create their own world and play freely. When they play in the world and solve missions they receive more elements to build with. Features - Build your own railway with an awesome collection of parts - Create amazing train sets with more than 50 different train parts - Jump into the trains and ride on your own track - Help the characters in different missions in the world and collect joy to unlock new elements to build with - Load cargo with cranes - Feed the animals to make them happy - Create up to five different profiles in the app The app is suitable for kids between 3 and 10 years old. KID SAFETY The safety of kids is very important for us at Filimundus and BRIO. There is no offensive or explicit material in this app and no ads. About FILIMUNDUS Filimundus is a swedish gamestudio focused in creating developing games for kids. We want to stimulate learning by giving them challenges where they can create things and then play with it. We believe in giving kids a creative environment where they can develop through open ended play. Visit us at: www.filimundus.se About BRIO For over a century, our driving force has been to spread joy among children around the world. We want to create happy childhood memories where the imagination is allowed to flow freely. BRIO is a Swedish toy brand that creates innovative, high-quality and well-designed wooden toys that give children a safe and fun play experience. The company was founded in 1884 and is represented in over 30 countries. For more information, please visit www.brio.net.
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.