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
Speed Dial XL: Big Photo Call
Call the people who matter with one tap on a large photo - no searching, no typing, no confusion.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
70 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.
Build your own version
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 included17 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 Speed Dial XL: Big Photo Call: 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
Allow users to customize the layout and display options for contacts.
Assumption to check: Limited customization for contact display
Validate with people who use this workflow before building.
Hypothesis 2
Integrate cloud storage for backup and recovery of favorite contacts.
Assumption to check: No backup option for contacts
Validate with people who use this workflow before building.
Hypothesis 3
Include features like scheduling calls or adding notes for each contact.
Assumption to check: Lack of advanced calling features
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the UI/UX for better user engagement and navigation.
Assumption to check: User interface can feel cluttered
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
Call the people who matter with one tap on a large photo - no searching, no typing, no confusion. Quick Fav Dial XL shows your favorite contacts as extra large photo buttons. It is made for elderly people, people with visual impairments, and kids: the buttons are big, the actions are simple, and a caregiver can set everything up once and lock it. WHAT IT DOES • One tap on a photo calls the person - or opens WhatsApp or Signal, if you prefer. • Choose what each tap does: call, message, WhatsApp, Signal, email or FaceTime (single, double, triple tap and more — or switch on "Single tap only" and get a simple menu instead). • Uses the contacts of your iPhone automatically — names, photos and numbers stay up to date, nothing to enter twice. • "Lock layout": relatives set up the wall, then lock it so nothing can be deleted or moved by accident. • Positions per screen from 1 extra large photo up to 44 - also in landscape. • Assign a single action to a position, e.g. "always WhatsApp Grandma". For smaller buttons and many more contacts per screen, check out the regular version of Quick Fav Dial.
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
React Native
Expo
Supabase
react-navigation
expo-camera
expo-contacts
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.
