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.
All your health in one app: chronic stress & energy tracker
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.
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.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Welltory: Stress & Heart Rate: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
All your health in one app: chronic stress & energy tracker Trusted by over 20 million people, featured in the App Store under Apps We Love, and collaborating with 30+ universities, including Harvard Medical School, Arizona State University, and Johns Hopkins, to advance health science. Welltory helps you understand your heart Sometimes your body feels hard to decode. Welltory turns its signals into insights to help you manage chronic stress, track energy reserves, navigate fatigue, and take charge of your long-term health. By analyzing heart rate variability, a proven health marker backed by 20,000+ studies, Welltory shows how your nervous system, sleep, and lifestyle impact how you. Track and reverse chronic stress Daily stress impacts your energy reserves, especially if you’re living with POTS, Long COVID, or ME/CFS. Turn your Apple Watch or wearable into a stress monitor. See how work, emotional pressure, and physical effort affect your baseline, and catch stress spikes before they take a toll or trigger a crash. Get your energy back Welltory tracks your body’s daily battery level in real time so you can pace your day, prevent sudden crashes, and know exactly when to push or pause. Track sleep & recovery Find out what’s disrupting your deep sleep, evaluate nighttime recovery, and access science-backed audio programs designed to help you fall asleep faster and wake up refreshed. Decode your health patterns Log flare-ups, crashes, and life events in your Journal. Connect your symptoms to HRV, stress, and recovery trends so you can spot hidden triggers and pace your energy with confidence. Track your migraines Log episodes, symptoms, and intensity alongside sleep and heart rate data to identify what triggers your migraines and map your patterns over time. Turn data into insights Stop juggling single-purpose health apps. Connect 1,000+ devices, wearables, and apps, including Apple Watch, Oura, Garmin, meditation tools, and lab results, into one smart health hub. Monitor blood pressure & heart health Keep tabs on hypertension, resting heart rate, and cardiovascular trends. Log readings manually or sync a blood pressure monitor to generate detailed PDF health reports you can share with your doctor. Note: Welltory reads HRV via camera or wearable sensors; it does not measure blood pressure directly via phone camera or Apple Watch. Track workouts & move without crashing Balance exercise with proper recovery. Welltory tracks active movement, including daily chores, walking, and intense workouts, and sets personalized longevity targets to help you avoid burnout. PRICING & TERMS Welltory is free to download and use. Upgrade to Welltory Premium for unlimited HRV analysis, deep symptom tracking, and advanced health insights via auto-renewing subscriptions. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current billing period. Renewal charges occur within 24 hours prior to the end of the current period. Manage or cancel your subscription anytime in your App Store Account Settings. Any unused portion of a free trial period is forfeited upon subscription purchase. Family Sharing is not supported for this app. Integrates with Apple Health. Terms of service: https://welltory.com/terms/ Privacy policy: https://welltory.com/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Your health data is stored securely in the cloud with enterprise-grade privacy protection. Support & Inquiries: [email protected] MEDICAL DISCLAIMER Welltory measures heart rate variability and heartbeat to provide wellness insights. It cannot measure blood pressure or other vital signs directly via a smartphone camera or Apple Watch. Welltory is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider regarding any medical condition.
Written user reviews are not shown here. Check current App Store reviews >
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: Users report difficulty with syncing health data from devices.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Some users find the measurement process slow.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Users want more personalized insights based on their data.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited community features for motivation.
Validate with people who use this workflow before building.
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.