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.
LonelyChat is a messenger with one rule: you can only talk to one person at a time.
$1.00 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for LonelyChat: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
LonelyChat is a messenger with one rule: you can only talk to one person at a time. One friend. One conversation. No group chats, no feed, no inbox full of people waiting on you — just the person you chose, and your full attention on them. WHY ONLY ONE? Most messaging apps keep you juggling dozens of chats and half-listening to all of them. LonelyChat does the opposite. With room for exactly one friend, every message matters and nobody gets a distracted reply. CHOOSING SOMEONE NEW • Long-press anyone on the globe and send a friend request. They decide: accept or decline. • Already have a friend? Then saying yes to someone new means letting your current friend go. It's a real choice — on purpose. • Past conversations stay as read-only history, and you can delete them anytime. • Rather not be asked? Turn off "Allow friend requests" in Settings. • Know them already? Add them directly with their 8-digit code. EVERYTHING A GOOD CHAT NEEDS Photos, videos, stickers and GIFs. React to messages, reply to a specific line, search your history, see when your friend is typing and when they've read you. Kept intentionally simple. TO THE WORLD Step onto a shared pixel globe and hold up a sign for everyone to see. Broadcast a line to the whole solar system, heart someone else's, and notice strangers passing by — a small public square beside your one private chat. TO THE SOLAR Travel to other worlds. When you and your friend are on different planets, messages travel at the speed of light — a note to Mars really does take minutes to arrive. A playful reminder that distance is real. PRIVATE BY DESIGN • No ads, no trackers, no third-party analytics. • Block and report anyone, anywhere in the app. • Delete your account and data whenever you want. LonelyChat isn't trying to maximize your screen time. It's a quieter place for the one conversation that matters.
Written user reviews are not shown here. Check current App Store reviews >
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
Assumption to check: Lack of user engagement features like groups or threads
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited profile customization
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Absence of media sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No content moderation tools
Validate with people who use this workflow before building.
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.