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.
The PLANBELLA Planner App is a modern minimalist calendar app
$8.99 · 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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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 PLANBELLA - Planner App: 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: Users report issues with syncing tasks across devices.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Some users find the interface cluttered and confusing.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited customization options for tasks and notes.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchase prompts can be intrusive.
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.
The PLANBELLA Planner App is a modern minimalist calendar app. It offers more than your average calendar app. PLANBELLA is like a digital bullet journal where you can organize events, tasks, and notes. Thanks to its stylish layout, your agenda always looks appealing and never cluttered. Planning is finally fun again! Say goodbye to overwhelming, cluttered calendar apps. Instead, look forward to structuring your day and checking off your to-dos every day. Here's what PLANBELLA offers: - Aesthetic Design: Enjoy an elegant minimalist layout. - Event Manager: Never miss important appointments, meetings or birthdays again. - ToDo Lists: Schedule tasks and enjoy checking them off. - Daily Notes: Capture your thoughts, ideas and memories. - Synchronization: Integrate external calendars, such as your partner's calendar or work calendar. - Notifications: Set reminders for things that are important to you. - Beautiful Pastel Colors: Highlight and color-code your calendar entries. - Recurrence Options: Save time with repeating entries. - No Subscription, No Registration: One-time payment, unlimited use! No mandatory sign-up. Widgets: In PLANBELLA, you also have the option to buy widgets as in-app purchases. Widgets are a fantastic addition to your home screen, providing quick access to essential functions. By buying these widgets, you actively support the ongoing development of the app. Every widget purchase goes directly into improving and enhancing PLANBELLA, so we can continue to provide useful features and updates for you.
Written user reviews are not shown here. Check current App Store reviews >
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.