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.
GoTall is the most accurate height predictor
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 GoTall - Height Predictor: 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 free features, leading to user frustration.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Inaccurate predictions for some users based on invalid input.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social sharing features.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Difficulties in understanding predictions.
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.
GoTall is the most accurate height predictor. Here's why it works: 1. We use real science. GoTall uses data from the CDC, a group of top doctors and scientists who study how kids grow. 2. To guess your true potential, we ask about: Your parents' and relatives' height (because your genes matter) Your sleep, food, and activity (because habits affect growth) Your stage of puberty (because timing matters) We look at the full picture. Instead of guessing from just your age, we look at everything together. That’s why our results are more accurate than just using a growth chart. Stick to the growth plan, and we’ll keep guiding you every step of the way. GoTall gives you a custom growth plan that includes: Daily exercises proven to support posture, bone strength, and natural growth hormone activity Nutrition analysis that checks if your diet supports optimal growth Lifestyle tracking so you can improve sleep, habits, and recovery We also offer premium features with subscriptions or purchases, such as a custom plan designed to support natural HGH production and optimal growth, or monthly updates that adjust your plan based on your habits and progress, so you can stay on track. Disclaimer: GoTall doesn’t offer medical advice. Our recommendations are based on widely known practices related to height growth. Always speak to a healthcare provider for individualized guidance. Some features, including full analysis and advanced tools, require a premium subscription or purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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.