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
Simple Transfer Pro - Photos
With over 7 million downloads, Simple Transfer is the easiest way of transferring your photos and large videos to computer using WiFi or USB
$49.99 · In-app purchases
PRICE
$49.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
2,418 ratings · Top 15%
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/
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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 Simple Transfer Pro - Photos: 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
Expand to include video transfer.
Assumption to check: Limited transfer options (only photos)
Validate with people who use this workflow before building.
Hypothesis 2
Introduce flexible subscription plans.
Assumption to check: High one-time cost
Validate with people who use this workflow before building.
Hypothesis 3
Implement cloud syncing for transferred photos.
Assumption to check: No cloud backup features
Validate with people who use this workflow before building.
Hypothesis 4
Allow batch selection and transfer.
Assumption to check: No batch processing for large numbers of photos
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
With over 7 million downloads, Simple Transfer is the easiest way of transferring your photos and large videos to computer using WiFi or USB. It can also convert HEIC photos to JPG, HEVC videos to MOV/MP4 and Live Photos to videos. Reviews: ●●●●● "Have never looked back since finding this app! Couldn't live without it now." ●●●●● "Works beautifully: I wish this was easier to find. It’s amazing how much time you can waste trying to transfer things from iPhone/iPad to PC, and all along this app was here, making it so easy." Main Features: ◉ View all your photo albums and videos on your computer and download them by a single click via WiFi or USB cable. ◉ Save photos and videos from your computer to your iPhone/iPad ◉ Export photos as JPG (Windows compatible) or HEIC ◉ Convert videos as MOV or MP4 (Windows compatible H.264 format) ◉ Export Live Photos to video or photo+video ◉ Photo Cleaner: clear space on your device by deleting large or duplicate photos and videos (premium feature). ◉ Photo Organizer: easily select and filter photos to delete, favorite or unfavorite them ◉ Free up space by automatically deleting transferred photos/videos (optional) ◉ Support for the new Apple's ProRaw and other RAW formats ◉ Safest way to transfer your photos and videos in your local WiFi network. They never go on the Internet or stored on any external server. ◉ Transfer photos and videos between iOS devices (iPhone, iPad and iPod Touch), select an album and tap on "Select All" to transfer all your photos/videos* ◉ Photos are transferred with full resolution including metadata and videos transferred with the highest quality available ◉ Works on Windows, Mac and Linux and it's fast! Simple Transfer does not use or transfer your files to any external server. It provides a completely private website to be accessed by only computers that are directly connected to your local WiFi network. Your photos and videos cannot be accessed from the Internet. Please contact our support directly at [email protected] or send an email from inside the app regarding any questions, suggestions or concerns.
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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.
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BUILD KIT DIFFICULTY
Advanced
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.
