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
instax mini Link
This app is exclusively for use with the FUJIFILM instax mini Link™ printer series.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
42,939 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 included18 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 instax mini Link: 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
Offer advanced features like layer support and batch editing.
Assumption to check: Limited editing tools compared to desktop applications
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the printing process with clear step-by-step guidance.
Assumption to check: Printing options can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Implement performance optimizations for handling large images.
Assumption to check: Some users experience crashes with larger photo files
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a freemium model with essential features for free users.
Assumption to check: Subscription model may deter casual users
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
This app is exclusively for use with the FUJIFILM instax mini Link™ printer series. Access the following features by connecting your instax mini Link™ printer to this app via Bluetooth. ＜Features for all instax mini Link™ printers＞ (1) Simple Print* Easily print images with your smartphone! *You can also print from videos. (2) Frame Print / Collage Print Add fun, creative frames to your images, or share your latest adventure as a collage, combining your snaps into one instax™ photo! (3) instax Camera™ Take photos with your smartphone, remotely, using the printer's power button as a shutter release! (4) instax AiR Studio™ Decorate the space with your favorite AR contents! Capturing photos with decorated AR contents anytime, anywhere! (5) Click to Collage Enjoy the photobooth experience with Click to Collage! Take a series of six images at three second intervals. 3, 2, 1... Smile! (6) Match Test Will you find your perfect match? Take the Match Test to find out! (7) Content Printing Mode Import your favorite images and content saved in the Pinterest® app or your smartphone's photo app directly into the app, simulate how you'll use them after printing, and then print! ＜Exclusive Function for instax mini Link 2™＞ (8) instaxAiR™ Show off your creativity! Simply press & hold the feature button, then draw in the air with the printer! [Supported OS] iOS17.0 or later
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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.
