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
Programming Notebook PRO
This is the PRO version of our free application, Programming Notebook.
$5.99 · In-app purchases
PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.6
22 ratings · Below Average
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 Programming Notebook PRO: map the core Developer Tools 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
Provide rich text editing features for better note-taking.
Assumption to check: Limited formatting options for notes.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a cleaner, more modern UI design.
Assumption to check: User interface feels cluttered.
Validate with people who use this workflow before building.
Hypothesis 3
Add tagging and folder options for better snippet organization.
Assumption to check: Limited organization for code snippets.
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate a feedback mechanism within the app for users to report issues.
Assumption to check: Poor customer support.
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
This is the PRO version of our free application, Programming Notebook. FEATURES: - Prevents automatic zooming when selecting text boxes to allow for code editing with ease. - Disables bouncing to allow for horizontal scrolling through code cells. - ability to hide navigation bar - status bar hidden automatically - dark mode support - new buttons to enable easier navigation on tricky web pages - JS injection to modify the site HTML slightly to remove contents that are unnecessary and consume space on a mobile device - no need to double tap in the browser in order to be recognized by buttons - automatic link handling, including authentication flow for Google sign-in - ability to connect runtime to Google Drive, both that of the current account and another account, thanks to automatic link handling - iPhone and iPad support - No ads COMING SOON - Other programming sites will be returning shortly. The feature has briefly been removed with the latest update, as it is being reworked - Split view for opening multiple sites at once - Support for multitasking on iPad - Markdown toolbar, automatically recognizes when a text cell is being edited - Ability to upload an image from your photos album to a text cell. - Copy/paste functionality - Swipe from edges to navigate backwards/forwards, allows us to preserve space on screen by removing unnecessary navigation buttons - Search history
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
Supabase
Zustand
react-navigation
react-native-paper
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.
