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
Blank Spaces Launcher
Blank Spaces is a minimalist launcher that turns your iPhone into a dumb phone
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
8,605 ratings · Top 15%
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
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
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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.
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 Blank Spaces Launcher: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Blank Spaces is a minimalist launcher that turns your iPhone into a dumb phone. It swaps a home screen full of icons for a simple list of the apps you actually need. We believe technology should empower us, not take our attention. • Simplify your home screen Your most important apps in a clean text list. No icons, no badges, no clutter. • Take back your focus Blank Spaces interrupts distracting apps before they open, so you can reclaim your time and attention. Use your phone as a tool and focus on what matters in life. • Lock what pulls you back Lock distracting apps on a schedule or with a time limit. Unlock them with a breathing exercise or a set of push-ups. • Make it yours Choose your theme, colors, and wallpaper. • Build lasting habits Track your streak and keep your focus for the long term. • Easy to use The app is completely intuitive, and setup takes 60 seconds. • Private by design We believe in openness, privacy, and 100% data ownership. See our privacy policy at blankspaces.app/privacy. BLANK SPACES SUBSCRIPTION Full access to Blank Spaces requires a subscription (monthly, annual, or lifetime). Subscriptions auto-renew unless cancelled at least 24 hours before the end of the period. Terms of Use - www.blankspaces.app/terms Privacy Policy - www.blankspaces.app/privacy Join Us - www.blankspaces.app/cult
Written user reviews are not shown here. Check current App Store reviews >
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
Add support for recurring tasks and customizable reminders.
Assumption to check: Task management lacks advanced features like recurring tasks and reminders.
Validate with people who use this workflow before building.
Hypothesis 2
Introduce tags and folders for better organization.
Assumption to check: Limited organization options for tasks and notes.
Validate with people who use this workflow before building.
Hypothesis 3
Implement a cleaner, more focused UI design.
Assumption to check: The user interface can feel cluttered with too many options.
Validate with people who use this workflow before building.
Hypothesis 4
Provide clear information on benefits of in-app purchases.
Assumption to check: In-app purchase options are not well communicated.
Validate with people who use this workflow before building.
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
React Navigation
React Native Paper
Firebase
BUILD KIT DIFFICULTY
Advanced
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.
