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
LocalOne Private Journal
LocalOne Private Journal is a privacy-first journal for iPhone built for sensitive writing.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 ratings · Top 5%
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 included16 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 LocalOne Private Journal: map the core Lifestyle 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 select fonts, colors, or themes for their entries
Assumption to check: Limited customization options for entries
Validate with people who use this workflow before building.
Hypothesis 2
Integrate reminders to encourage regular journaling
Assumption to check: No reminder feature for journaling
Validate with people who use this workflow before building.
Hypothesis 3
Enable sharing entries with selected contacts or social media
Assumption to check: Lack of sharing functionality
Validate with people who use this workflow before building.
Hypothesis 4
Add options to export journal entries as PDF or text files
Assumption to check: No export feature for journal data
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
LocalOne Private Journal is a privacy-first journal for iPhone built for sensitive writing. No account. No cloud. No analytics. Your entries stay on your device. Whether you are keeping a personal diary, recording therapy reflections, writing daily notes, tracking difficult periods, or saving private memories, LocalOne is designed to give you a simple writing space with strong local protection. WHAT MAKES IT PRIVATE • Fully offline journaling • Encrypted local storage for entries • Passcode lock on launch • Auto-lock options for extra protection • No account creation • No cloud sync • No analytics or tracking This is your private space. Nothing leaves your phone. WRITE QUICKLY AND KEEP GOING • Create a new entry instantly • Continuous autosave while typing • Reverse chronological timeline for recent entries • Edit or delete entries anytime • Simple rich text tools including bold and font size presets • Optional photo attachments when words are not enough Everything is built to stay out of your way so you can capture thoughts the moment they happen. FIND WHAT YOU WROTE • Full-text search across your journal • Search is performed locally on device • Quickly revisit past reflections, names, events, or ideas USE CASES • Daily journaling without worrying about syncing to a server • Private note-taking for personal reflection • Recording health, mood, or therapy-related thoughts • Travel memories and life updates with optional photos • A secure place for ideas, drafts, and sensitive writing SECURITY CONTROLS Choose how the app locks to fit your routine: • Lock after 1 minute • Lock after 5 minutes • Lock immediately when the app goes to the background SIMPLE AND HONEST LocalOne Private Journal focuses on a single goal: private journaling on your phone. It does not ask you to sign up, does not send your writing to the cloud, and does not build features around tracking or sharing. One-time purchase. No subscription. If you want a journal that works offline, protects your entries, and keeps your writing on your device, LocalOne Private Journal is built for exactly that.
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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
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.
