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
3sparks Chat
Chat smarter with 3sparks Chat – your personal LLM client for local and cloud models.
$5.99 · In-app purchases
PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.2
28 ratings · Top 30%
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's included19 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 3sparks Chat: 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 customizable notification settings.
Assumption to check: Limited notification options for messages
Validate with people who use this workflow before building.
Hypothesis 2
Add online/offline status indicators for users.
Assumption to check: Lack of user presence indicators
Validate with people who use this workflow before building.
Hypothesis 3
Include emoji reactions for messages.
Assumption to check: No option for message reactions
Validate with people who use this workflow before building.
Hypothesis 4
Enhance search with filters for date and user.
Assumption to check: Limited search functionality
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
Chat smarter with 3sparks Chat – your personal LLM client for local and cloud models. Connect to your favorite AI models, whether they’re running on your own machine or through cloud services: • Local models like LM Studio, Ollama, AnythingLLM, OpenWebUI (Mac, PC, or Linux) • Cloud-based APIs like OpenAI, Mistral, Gemini and others Now with powerful new tools: • Image & file support – Upload images (for vision-capable models) or text files (supported by all models) to enhance your chats. • Web content reader – Fetch and include webpage content in your chats using Jina Reader • Home screen widget – Start a new chat instantly by snapping a photo, uploading an image, pasting clipboard text, or starting blank • Share extension – Send text or links from any app into 3S Chat with a tap Plus, the built-in AI Keyboard Extension lets you rephrase and fine-tune your writing in any app like iMessage, WhatsApp, and email: • Customizable prompts for instant rewriting • Personalized tone and style settings • No forced cloud storage – your data, your choice 3S Chat is optimized for iOS, iPadOS and VisionOS, so you can enjoy a seamless experience across your iPhone, iPad, and Apple Vision Pro.
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
Zustand
Axios
React Navigation
Shadcn/UI
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.
