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
NatureCalls - Alarm|Reminder
Imagine being pulled from sleep or reminded, not by a jarring buzz, but by waves rolling onto shore, birdsong echoing through a forest, or a river flowing gently past mossy stones
$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.
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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 included15 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 NatureCalls - Alarm|Reminder: map the core Lifestyle 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
Include a wider selection of high-quality sounds and user-uploaded options.
Assumption to check: Lack of sound variety and quality
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize snooze duration and alarm labels.
Assumption to check: Limited alarm customization
Validate with people who use this workflow before building.
Hypothesis 3
Implement a more flexible reminder system with multiple time settings.
Assumption to check: No reminder flexibility
Validate with people who use this workflow before building.
Hypothesis 4
Add gamification elements, like achievements for consistent usage.
Assumption to check: User engagement is low
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
Imagine being pulled from sleep or reminded, not by a jarring buzz, but by waves rolling onto shore, birdsong echoing through a forest, or a river flowing gently past mossy stones. That's the experience waiting for you every morning with the NatureCalls Reminder, Alarm & Timer app. Alarms That Actually Feel Good - Choose from a stunning collection of nature sounds to greet your morning. Ocean waves, forest ambience, flowing rivers, and more — each paired with breathtaking nature photography that makes waking up something to look forward to. Reminders You'll Never Miss - Stay on top of your day without the stress. Set reminders for any task, add lists or key details directly to each one, and let the call of nature nudge you at just the right moment - no more overlooked to-do's. Timers for Every Moment - Countdown your workouts, time your cooking, or pace any part of your day — all with the same beautiful nature alerts keeping you on track. Fully Flexible Scheduling - Set custom, standard, repeating, or snooze intervals to match your life. Automatically repeat on weekdays, weekends, or any schedule you choose. Your app works quietly in the background while you focus on what matters. Why You'll Love It - Most reminder apps feel like chores. This one feels like a breath of fresh air. Every alert is an opportunity to pause, reconnect with the natural world, and move through your day with a little more calm. Offline support - when wifi is not available, NatureCalls is still there for you! Nature is calling. Are you ready to listen?
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
React Native
Expo
Supabase
Zustand
react-navigation
expo-av
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.
