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
Heedam Filter
Hello,
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.0
2 ratings · Top 30%
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/
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 Heedam Filter: map the core Photo & Video 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 advanced editing tools like batch editing and AI background removal.
Assumption to check: Limited editing features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement cloud storage for user edits and projects.
Assumption to check: No cloud backup for edits
Validate with people who use this workflow before building.
Hypothesis 3
Add a feature for users to provide feedback on filters and tools.
Assumption to check: Lack of user feedback mechanism
Validate with people who use this workflow before building.
Hypothesis 4
Offer a more varied subscription model to cater to different user needs.
Assumption to check: High price for premium filters
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
Hello, this is Heedam :) I capture every moment of everyday life in photos. Ordinary moments from daily life, beautiful moments gifted by the four seasons, precious moments with friends, loved ones, and family, and special moments from my travels. To help you capture joyful moments more clearly, beautifully, and in a more special way, I prepared 52 different filters. Heedam offers filters optimized for people who love landscapes, nature, and bright, rich colors. Make your photos and videos feel even more special with a variety of filters. —————— Filter List 1. Daily: Natural colors that never feel too much (daily1, daily2, cafe1, cafe2, food1, food2, food3, sunset1, sunset2, sunset3, night1, night2) 2. Season: Colors that bring out the mood of each season (spring1, spring2, spring3, spring4, spring5, summer1, summer2, summer3, summer4, fall1, fall2, fall3, winter1, winter2, winter3, christmas1, christmas2) 3. Film: Bright film-like tones + grain (film1, film2, film3, film4, film5, film6, film7) 4. Mood: Rich saturation + mist (dream1, dream2, skyfilm, travel1, travel2, ocean, seoul, mood1, mood2, mood3, mood4, twilight1, twilight2, twilight3, cinematic1, cinematic2) #Optimized more for landscapes and aesthetic photos than selfies. #All features included with no extra payment You can use all filters without any additional in-app purchases. No monthly subscription. Use it continuously with a one-time purchase. Simple, fast, and convenient features. - Take photos right after applying a filter. - Video recording has been added! - Add grain with one tap. - Add mist with one tap. - Adjust filter intensity. - Apply filters to captured images. - RAW file support for DSLR and mirrorless cameras has been added. (1.3.0) - High-resolution images over 20MB can also be edited. (1.3.0) - Apply filters to captured videos. ◇ Instagram Check out new photos and updates at @heedam_i. ◇ Contact If you have any issues using the app or need anything, please contact us at [email protected] or Instagram @heedam_i. Hee means joy, Dam means to capture. Capture joy.
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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
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.
