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
HEIC Converter: JPG PDF PNG
HEIC Converter JPG PDF PNG is the fastest and easiest way to convert iPhone HEIC photos into JPG, PDF, PNG, or WEBP — all in one simple, offline app.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.7
3 ratings · Top 50%
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 included16 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 HEIC Converter: JPG PDF PNG: 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
Expand to include more formats like BMP, GIF.
Assumption to check: Limited format options for conversion
Validate with people who use this workflow before building.
Hypothesis 2
Optimize backend processing for faster results.
Assumption to check: Inconsistent conversion speed
Validate with people who use this workflow before building.
Hypothesis 3
Integrate basic image editing tools before conversion.
Assumption to check: Lack of image editing features
Validate with people who use this workflow before building.
Hypothesis 4
Add cloud storage integration for user access across devices.
Assumption to check: No cloud sync option
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
HEIC Converter JPG PDF PNG is the fastest and easiest way to convert iPhone HEIC photos into JPG, PDF, PNG, or WEBP — all in one simple, offline app. No ads. No subscriptions. Just a one-time purchase for lifetime access. Key Features • Convert HEIC images to JPG in seconds • Also convert to PDF, PNG, and WEBP formats • Preview your image before saving or sharing • Works 100% offline after installation (no internet needed) • All processing is done on your device for maximum privacy • Clean, simple interface with lightning-fast performance Why Use HEIC Converter? Many apps, websites, and online services still don’t support HEIC files. This app converts your HEIC photos into universal formats like JPG and PDF quickly and reliably — without ever uploading your images to a server. No uploads. No accounts. No privacy concerns. Everything happens securely on your own device. Perfect For • Content creators and Instagram users • Students and professionals sending documents • Photographers and designers exporting images • Anyone who needs reliable HEIC conversion on the go Compatibility • iPhone & iPad • iOS 15 or later Download Now Convert HEIC files to JPG, PDF, PNG, or WEBP — fully offline, with lifetime access from a single purchase.
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
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BUILD KIT DIFFICULTY
Starter
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.
