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
Habit Log | Level up
[Habit Log] — A habit tracker that turns daily check-ins into a leveling-up game
$0.99 · In-app purchases
PRICE
$0.99
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'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 Habit Log | Level up: 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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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
Implement a more robust habit management system that allows bulk editing and tracking.
Assumption to check: Difficulty in tracking multiple habits simultaneously
Validate with people who use this workflow before building.
Hypothesis 2
Add detailed progress charts and weekly/monthly summaries.
Assumption to check: Limited analytics and insights on habit progress
Validate with people who use this workflow before building.
Hypothesis 3
Incorporate social features for users to share progress and challenge friends.
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Enhance notification options for reminders and motivational prompts.
Assumption to check: Basic notification settings
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
[Habit Log] — A habit tracker that turns daily check-ins into a leveling-up game. One-tap logging of frequency and duration, paired with a Lv.1-99 achievement system that makes every entry feel like progress. ■ Why Habit Log? - Lightning-fast logging: Open → tap → logged. Done in 3 seconds. Quick mode and timer mode supported. - Leveling achievement system: Lv.1-99 curve, EXP points (formula: 10 + level × 2), 12 rank tiers, and 35 achievements across milestone / special / hidden categories. - True privacy: Face ID / Touch ID lock, decoy screen, on-device storage only — nothing leaves your phone. - Data insights: Frequency bar chart, time-of-day distribution, duration trend line. Switch between week / month / year views. ■ Main Features - Home: Monthly summary, today's summary, big one-tap log button, timer mode. - History: Grouped by date, swipe to delete, time and duration per entry. - Stats: Total count, average duration, monthly count, longest streak — across 4 chart types. - Achievements: 12 milestone, 15 special, 8 hidden — each unlocks EXP. - Levels & Ranks: 12-tier rank progression from beginner to master. - Settings: Privacy lock, decoy screen, CSV export, 6 languages, light / dark / auto. ■ Privacy & Data - All data stays on your device. Nothing is uploaded. - Optional Face ID / Touch ID or 4-digit passcode lock. - CSV export — your data goes with you. ■ Contact - Questions or feedback? Reach us via in-app Settings or App Store reviews. - Privacy Policy: https://www.myhandylog.com/privacy - Terms of Use: https://www.myhandylog.com/eula Thanks for choosing Habit Log. Let's make logging your habits clear, fun, and rewarding.
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.
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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.
