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.
Private LLM: Nucleus is your intelligent, on-device personal assistant powered by Apple’s Foundation Models framework
$3.99 · 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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Generating… usually about a minute.
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 Private LLM: Nucleus: 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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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: Limited customization options for templates.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No offline functionality.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of advanced settings for notifications.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchase limitations on features.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Private LLM: Nucleus is your intelligent, on-device personal assistant powered by Apple’s Foundation Models framework. It combines advanced natural language understanding with the privacy of full on-device processing, ensuring your data never leaves your device. No Internet. No login. No data collection. Seamless Integration Across Your Day Nucleus connects deeply with Calendars, Reminders, Health, Maps, and Weather, helping you stay organized, aware, and productive. • Manage and update reminders and calendar events. • Track health data and view trend charts. • Get directions, routes, and travel times. • Stay informed with live weather updates and daily summaries. Daily Kickstart Each time you open Nucleus, you’re greeted with a personalized Daily Kickstart, a complete snapshot of your day that includes: • Weather conditions and outfit suggestions. • Today’s reminders and upcoming calendar events. • Directions to your destinations. Personal Space Give Nucleus a mind of its own. Ask it to remember anything, a thought, an idea, a task, or a fact and recall it anytime. You can even add documents and later ask questions or recall specific details about them, all while staying within your chat. Your personal memory vault, fully private and on-device. Intelligent Conversations Ask Nucleus anything about your integrated data or general topics. It understands context, allowing follow-up questions that feel natural and continuous. Choose Auto Mode to let Nucleus automatically pick the right tools, or use Manual Mode for precise control. Creativity with Image Playground Bring your ideas to life using Image Playground, generate creative visuals directly within Nucleus. Everything is processed privately and on-device, ensuring speed and security. Personalize Your Experience Make Nucleus yours with visual and behavioral customization. • Change chat bubble colors. • Match your app icon to your theme. • Set custom instructions that shape Nucleus’s personality and response style. Siri Integration Use Siri to interact with Nucleus hands-free. Just say “Hey Nucleus” to access reminders, calendars, health data, or general questions, all processed privately, right on your device. Built for Privacy and Performance: Private LLM: Nucleus runs entirely on your device using Apple’s Foundation Models framework. No cloud, no tracking, no data sharing. Just powerful, personal intelligence built for speed, context, and privacy. Nucleus gives you everything you expect from a next-generation AI assistant, integrated tools, personalized insights, private processing, and an elegant experience designed for the Apple ecosystem.
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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.