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
Ave Maria Clock
Ave Maria Clock brings the ancient tradition of the Liturgy of the Hours to your daily life, automatically calculated for your exact location anywhere in the world.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
4 ratings · Top 5%
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 included17 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 Ave Maria Clock: map the core Productivity 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 social sharing options for reminders.
Assumption to check: Lack of user engagement features
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more intuitive reminder management interface.
Assumption to check: Difficult to manage multiple reminders
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to upload custom sounds for notifications.
Assumption to check: Limited customization options for alerts
Validate with people who use this workflow before building.
Hypothesis 4
Add features to track prayer habits over time.
Assumption to check: No analytics on prayer frequency
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
Ave Maria Clock brings the ancient tradition of the Liturgy of the Hours to your daily life, automatically calculated for your exact location anywhere in the world. Based on the movement of the sun rather than the clock, each prayer is tied to a solar event (sunrise, solar noon, sunset, and solar midnight) just as the faithful have observed for centuries. Notification Hours - Matins (Nautical Dawn) - Lauds (Sunrise) - Prime (1st Hour) - Terce (3rd Hour) - Sext (Solar Noon) - None (9th Hour) - Vespers - Sunset - Ave Maria bell - Compline Features: - Solar calculations based on your GPS location - Notifications events with traditional bell sounds - SkyMap with your location, and sun and moon positions - Works anywhere on Earth "Seven times a day I praise you." — Psalm 119:164
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
Zustand
react-navigation
expo-notifications
react-native-sound
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.
