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
HelloHabit - Habit Tracker
Simple habit tracking, made easy
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
2,381 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.
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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 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 HelloHabit - Habit Tracker: 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 reminders and motivation features to encourage daily usage.
Assumption to check: Users often find it difficult to maintain consistency with their habits.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize habit frequencies and reminders more flexibly.
Assumption to check: Limited customization options for habit tracking.
Validate with people who use this workflow before building.
Hypothesis 3
Implement reliable cloud sync and offline capabilities.
Assumption to check: Some users report bugs with data syncing.
Validate with people who use this workflow before building.
Hypothesis 4
Add social features to allow users to share progress and encourage each other.
Assumption to check: Lack of community features for accountability.
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
Simple habit tracking, made easy. HelloHabit helps you set goals, build habits, and achieve success. Read the full feature set below: HABIT TRACKING Custom Habits: Personalize your routine with habits like exercise, run, steps, read, meditate, drink water, wake up early, sleep early, journal, brush teeth, cook, quit smoking, quit drinking, quit social media, quit skin picking, and more. Suggestions: Explore hundreds of habit ideas for your list, including fitness, health, productivity, and wellness goals. Goals: Set daily, weekly, monthly, or yearly targets to achieve your desired outcomes. Reminders: Set up multiple reminders per habit to stay on track and build consistency. Activity Entries: Log unlimited activities for past or current dates to monitor your progress. Streaks and Stats: Track your progress with detailed streaks, statistics, and records to stay motivated. Timers: Stay focused with stopwatch or countdown timers for time-bound habits. Health Sync: Automatically sync health-related habits with Apple Health for comprehensive tracking. Quit Trackers: Monitor the duration since quitting habits to celebrate milestones. JOURNAL Detailed Notes: Record insights and progress for each habit to reflect on your journey. Rich Text Editor: Customize notes with formatting and styles for better organization. Centralized View: Access habit activity and notes in one place for easy reference. Filtering: Organize journal entries by habit to review specific areas of focus. Bookmarking: Mark important notes for quick reference and easy access. SCHEDULE Reminder Options: Set one-time, daily, weekly, or monthly reminders to keep your habits top of mind. Unlimited Reminders: Add as many reminders as needed for each habit to stay consistent. Calendar View: Check your schedule in daily, weekly, or monthly formats to plan ahead effectively. PLATFORM Dark Mode: Try out a sleek, dark interface for comfortable nighttime use. Customization: Personalize various settings to suit your preferences and needs. Sync Across Devices: Access your data seamlessly on all your devices for convenience. Customer Support: Get help via an in-app chat feature for quick assistance. HelloHabit offers all features for free within the following limits: - 5 total active habits - 1 reminder per habit - 3 journal notes per day HelloHabit Premium offers unlimited access. We offer a 7-day free trial, and then a monthly or yearly subscription offer. Country-specific pricing is visible within the app! Terms of Use: https://hellohabit.com/terms Privacy Policy: https://hellohabit.com/privacy
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
react-native-calendars
@react-native-community/datetimepicker
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.
