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.
Train your brain with BrainHQ from Posit Science—the most rigorous program available for better brain health, and the only one backed by more than 100 scientific papers showing benefits - including the breakthrough NI...
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.
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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 BrainHQ: 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 personalization options for training routines.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Some exercises can feel repetitive.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchases can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Progress tracking lacks depth.
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.
Train your brain with BrainHQ from Posit Science—the most rigorous program available for better brain health, and the only one backed by more than 100 scientific papers showing benefits - including the breakthrough NIH-funded ACTIVE study. Now with new features that contribute to your brain fitness success! BrainHQ represents the culmination of 30 years of research in neuroscience and brain health. Top scientists from around the world helped to develop and test the BrainHQ exercises. The result: a training system that comprehensively improves brain performance, from the most basic elements of perception through the most complex elements of memory, attention, and cognitive function. No other brain fitness program can match BrainHQ in scientific proof. More than 100 publications from independent, randomized controlled trials have shown that the exercises and assessments in BrainHQ drive real change. These changes include: • cognitive improvements, such as better memory and faster processing speed • real-world improvements, including safer driving and improved quality of life • physical brain changes, like healthier white matter and more coordinated neurons. All of this means that BrainHQ works—in laboratory studies, and in the lives of everyday people: •"BrainHQ is a no-brainer must-have in my book…This training has expanded my visual, fine-tuned my audio and even my reflexes seem to be getting faster. BrainHQ is fun and gives me the challenges I need to keep my brain working out on a daily basis." - C. MacDonald •"Only a few months into the BrainHQ exercises the difference is clear, this isn’t left to speculation, I saw drastic improvements…and my family has noticed a strong improvement." - A. Amitrano And leading publications agree: “Our testers concluded that Posit's product—one of the few so far to undergo clinical trials and peer-reviewed research—had the firmest scientific grounding.” - Wall Street Journal The BrainHQ app helps you set and achieve your brain training goals—so it not only works, it works for you. Each exercise adapts to your performance and gets more challenging as your performance improves, just like a personal trainer for your brain. The training is designed to fit into your life: train for just 5 minutes in your spare time, or do a complete workout in an hour. BrainHQ is a free download, and includes a free exercise every day. For full access, we offer the following recurring subscription options: 1 month: $13.99 1 year: $94.99 These prices are for United States customers. Pricing in other countries may vary and actual charges may be converted to your local currency depending on your country or residence. Monthly subscription are billed once per month, and an annual subscriptions are billed once per year. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. Payment will be charged to iTunes Account at confirmation of purchase. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Privacy Policy: https://www.brainhq.com/privacy Terms of Use: https://www.brainhq.com/terms
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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.