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.
App Overview
True Age
trueage turns your apple health data into a clear, science‑informed true age you can act on
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for True 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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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Incorporate gamification elements and social sharing features.
Assumption to check: Users find it challenging to maintain motivation for health tracking.
Validate with people who use this workflow before building.
Hypothesis 2
Utilize HealthKit/Google Fit integration for automatic data syncing.
Assumption to check: Many users struggle with data entry and accuracy.
Validate with people who use this workflow before building.
Hypothesis 3
Provide tailored suggestions and health tips based on user inputs.
Assumption to check: Lack of personalized recommendations based on health data.
Validate with people who use this workflow before building.
Hypothesis 4
Implement push notifications for reminders and motivational content.
Assumption to check: Limited user engagement after initial download.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
trueage turns your apple health data into a clear, science‑informed true age you can act on. instantly see how your heart, fitness, sleep, and daily movement make you biologically younger or older, plus get simple tips to improve. your true age: a dynamic biological age score compared to your actual age. what’s driving it: clear factor breakdowns (rhr, hrv, vo₂ max, steps, sleep, body composition, walking steadiness, blood pressure, and more) with impact bars. actionable insights: personalized, plain‑english tips to improve the biggest opportunities first. timeline views: toggle week/month and navigate dates to spot trends at a glance. beautiful, fast ui: smooth animations, compact controls, and a focused, readable layout. private by design: data comes from apple health; you control permissions at any time. note: trueage provides wellness insights and is not a medical device. always consult a healthcare professional for medical advice.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
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BUILD KIT DIFFICULTY
Intermediate
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.
