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 simple app is designed to do one thing well: alert you when your heart rate goes above or below the BPM thresholds you set.
$6.90 · 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.
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Combine features and design from your favorite apps.
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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 Beat Watcher: Heart Rate Alert: 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 heart rate monitoring features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of social sharing options
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No customizable alerts beyond heart rate
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited historical data visualization
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 simple app is designed to do one thing well: alert you when your heart rate goes above or below the BPM thresholds you set. Beat Watcher integrates with the Health app to read your heart rate. Use this app as a way to listen to your body or as a continuous background tachycardia monitor or POTS tracker. It can be great for: - recognizing and managing stress - breathing exercises - meditation - mindfulness - working out - monitoring for bradycardia (abnormally low heart rate) Some users with Postural Orthostatic Tachycardia Syndrome (POTS) and Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) have found this app helpful for monitoring and managing symptoms. Turn the Digital Crown on Apple Watch to set the desired BPM threshold. Then, you'll hear a sound and feel a vibration when your heart rate goes above the threshold, and a different sound and vibration when your heart rate goes back below the level you set. Enable Low Alerts in Settings to also get notified when your heart rate drops below a second threshold you set. Monitor for both high and low heart rate conditions at the same time. Install the free Beat Watcher companion app on your iPhone to receive phone alerts when your heart rate crosses a threshold. Turn on Critical Alerts to hear a loud sound even when your phone is on silent or Do Not Disturb — so you or a loved one can be alerted during sleep. Optionally turn on Background Mode to continue getting haptic and audible feedback in response to your heart rate after you drop your wrist or leave the app. Enable the Persistent Alerts setting to continue getting haptic and audible feedback every two seconds while your heart rate remains above or below your set thresholds. Or, if you just want constant heart rate monitoring without the haptic and audible feedback, you can turn Alerts off entirely. This app also works with a Bluetooth chest strap heart rate monitor, like the Polar H10, paired with your Apple Watch. Using it this way can improve battery life of the Apple Watch when you leave Background Mode running for a long time, since your Apple Watch heart rate sensor is not running constantly. Also, this lets you continue getting audio feedback from your Apple Watch or see your heart rate on the Apple Watch screen even when you aren't wearing it, like when it's on the charger. Note: Background Mode will not work at the same time as a Workout started in another app. For example, if you start Background Mode in Beat Watcher and then start an Outdoor Run Workout in the built-in Workouts app, Beat Watcher will not continue to run in the background. This app requires watchOS 8 or newer, which requires Apple Watch Series 3 or newer.
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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.