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
The Great Lock-In
Welcome to The Great Lock-In - your companion for the scientifically-backed 120-day habit formation journey.
$1.99
PRICE
$1.99
No 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's included15 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 The Great Lock-In: 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 gamification elements to encourage focus and reward users.
Assumption to check: Users often find it hard to stay focused for long periods.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance UI design with vibrant colors and animations.
Assumption to check: Many productivity apps lack visual appeal.
Validate with people who use this workflow before building.
Hypothesis 3
Implement smart reminders and alerts to help users manage their sessions better.
Assumption to check: Users may forget to start or stop timers.
Validate with people who use this workflow before building.
Hypothesis 4
Add a dashboard view to visualize completed tasks and time spent.
Assumption to check: Difficulty in tracking long-term progress on tasks.
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
Welcome to The Great Lock-In - your companion for the scientifically-backed 120-day habit formation journey. Research shows it takes an average of 120 days to form a lasting habit. The Great Lock-In guides you through this transformative journey with powerful tools and daily motivation. KEY FEATURES: • 120-Day Challenge - Track your progress through the proven habit formation timeline • Multiple Habit Tracking - Build several positive habits simultaneously • Daily Check-ins - Stay accountable with quick, easy progress updates • Smart Reminders - Never miss a day with customizable notifications • Beautiful Analytics - Visualize your journey with insightful charts • Journal & Reflection - Document your thoughts and breakthroughs • Focus Mode - Dedicated sessions for deep work and productivity • Dark Mode - Easy on the eyes during evening check-ins • Data Export - Keep your progress safe with backup options WHY THE GREAT LOCK-IN? • Science-Based: Built on research showing 66 days for habit formation • Simple Yet Powerful: Clean interface that doesn't overwhelm • Privacy First: Your data stays on your device • One-Time Purchase: No subscriptions, lifetime access • Continuous Updates: Regular improvements and new features Whether you want to exercise daily, meditate, read more, or build any positive habit, The Great Lock-In provides the structure and motivation you need to succeed. Join people who have transformed their lives one day at a time. Your 66-day journey to lasting change starts now!
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
TypeScript
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.
