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
WristChat for Facebook
WristChat lets you send and receive messages with your friends on Facebook & Messenger.
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.4
212 ratings · Below Average
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 WristChat for Facebook: map the core Social Networking 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 more functionalities like video calls and group chats.
Assumption to check: Limited features compared to full Facebook app
Validate with people who use this workflow before building.
Hypothesis 2
Implement more modern UI elements and animations.
Assumption to check: User interface is not very engaging
Validate with people who use this workflow before building.
Hypothesis 3
Provide customization options for notifications.
Assumption to check: Notifications can be overwhelming
Validate with people who use this workflow before building.
Hypothesis 4
Optimize the app for better performance on various device specifications.
Assumption to check: Performance issues on older devices
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
WristChat lets you send and receive messages with your friends on Facebook & Messenger. Features - Easily sync and refresh all of your conversations - Read direct & group conversations - Reply in conversations via Dictation, Scribble, or Emojis - Create Quick Replies to reply fast and stay in the conversation - Sign Out / Log Out with a single tap How It Works - Securely Log In to your Messenger account on the iOS companion app (Facebook Log In) - Your conversations should instantly start syncing on the watch app if it is open. If it doesn't start automatically, you can tap Continue on the watch to manually start it after Logging In on your iOS app. Privacy & Security - We NEVER save any of your information, do not have access to any credentials, or communicate with any remote server. All information and data is yours and we strictly adhere to that. You are free to Sign Out of your account on iOS or Watch at any time. Support & Questions - Feel free to check out pour FAQs to get answers to common questions - Don't hesitate to reach out with questions or concerns Note: WristChat is not an affiliate, nor endorsed by, Facebook. We abide by all applicable Terms and Privacy Agreements.
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.
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BUILD KIT DIFFICULTY
Expert
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.
