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
Photo Measures
Photo Measures is the most elegant and the easiest way to save measures on your own photos on iPhone and iPad!
$6.99 · In-app purchases
PRICE
$6.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
527 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 included17 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 Photo Measures: 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
Implement calibration features for better accuracy.
Assumption to check: Difficulties in accurate measurements when taking photos
Validate with people who use this workflow before building.
Hypothesis 2
Add more editing tools for better annotation customization.
Assumption to check: Limited editing capabilities for annotations
Validate with people who use this workflow before building.
Hypothesis 3
Optimize app performance for lower-end devices.
Assumption to check: Inconsistent performance on older devices
Validate with people who use this workflow before building.
Hypothesis 4
Integrate cloud storage options for user photos.
Assumption to check: Lack of cloud backup for 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
Photo Measures is the most elegant and the easiest way to save measures on your own photos on iPhone and iPad! Architectural Digest - "Very useful when shopping or meeting with contractors" Tuaw.com - "It's perfect for your own work around the house, and handy for creating plans to bring to a contractor" AppSafari - "So incredibly convenient" Featured on the front page of the AppStore under New & Noteworthy and Staff Favorites in more than 70 countries, including the US, France, Germany and Canada. Recommended by many reference magazines, websites and blogs all around the world: Architectural Digest, Tuaw.com, This Old House, AppOfTheDay.com, AppSafari.com, etc... ◆◆◆◆◆ Constructing a house? Engineering a new project? Moving to a new place? Take some photos and note down the dimensions on the photos to remember the exact layout, and to make sure that everything will fit easily. Need to keep in mind the exact dimensions of an object? Just take a photo and quickly write them on it. Are you decorating? Want to buy a new frame or a new furniture but not sure it will fit? No problem since you can have all your house dimensions always with you! ◆◆◆◆◆ You are a real estate agent? A contractor? An engineer? A designer? Working in the construction industry? Someone who wants to keep his house's measure easily accessible? Whenever you need to save dimensions, sizes, angles or write down a detail you need to remember, Photo Measures will help you to be more efficient and more accurate. ◆◆◆◆◆ Photo Measures helps you to: . Take a photo and directly draw measures on it . Zoom into and out of your photo when you need more precision . Edit your measures with a very intuitive interface . Quickly add text as comments when measures are not enough . Native support for angles . Save your measures in imperial or metric units . Easily organize your photos by category . Export your dimensions in high resolution by email or to the photo library . Export as PDF or JPG . Import photos of any size and aspect ratio . Support Retina display Keep posted, a lot of new features are planned for the next versions!
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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
react-navigation
@react-native-async-storage/async-storage
expo-camera
Zustand
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.
