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.
This Know Your Brain Age™ test is powered by CNS Vital Signs
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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 Know Your Brain Age: map the core Health & Fitness 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 user engagement after initial assessment
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of personalized feedback
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No social sharing options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Subscription model without clear 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.
This Know Your Brain Age™ test is powered by CNS Vital Signs. A world leader in both clinic and research based computerized neurocognitive testing. The cognitive tests in this app are utilized by thousands of healthcare professionals to evaluate and manage patients all over the world. If you download the Know Your Brain Age™ app and test yourself, remember you need to put forth your best effort. There is no additional cost to take the test again (and again) if you feel your score does not correctly reflect your brain age. A historical report of all your scores will be available on the app. Also note the youngest age we calculate is "Under 40". This does not mean if you are under 40 you should not take the test. To the contrary you should absolutely take the test to make sure you score "Under 40". This evaluation will take about 15 minutes and by analyzing your test results we can calculate a Know Your Brain Age™ test score in a single Brain Age number. Plan taking the test on your device in a quiet place with no interruptions for at least 20 minutes. Put forth your best effort. Generally speaking, if your brain age is greater than your actual age, you may want to see your healthcare provider and tell them that you have scored poorly on a cognitive test for someone of your age. If your test score is your age or younger, you are within the age appropriate normal range or perhaps better. However, even if you scored well, should you feel you are experiencing poor memory or other neurological issues, you should consider seeing your healthcare provider to discuss. Your provider can download a comprehensive clinical version of this application and retest you if your provider feels your score reflects the need for more thorough testing. For example, if you are 25 years old and score a Brain Age of 70, that score is above your chronological age and thus is potentially an abnormally poor score for someone 25 years old. Alternatively, if you are 70 years old and score a Brain Age of 40, that score is less than your chronological age and an excellent score for someone 70 years old. With such a brief set of tests, the app can calculate brain ages as low as under 40 years old and as high as 90. So the score as viewed on your report will fall somewhere between 40 and 90 years of age. To get a more precise score of your Brain Age requires much more comprehensive testing than what is practical here.
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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.