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
Plain Text Editor
Simple distraction-free text editor without any rich text nonsense
$5.00 · In-app purchases
PRICE
$5.00
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.4
9 ratings · Top 30%
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 included15 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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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 Plain Text Editor: 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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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
Introduce rich text editing features like bold, italic, and lists.
Assumption to check: Limited formatting options for text editing
Validate with people who use this workflow before building.
Hypothesis 2
Add cloud synchronization to access notes across devices.
Assumption to check: No cloud sync feature for notes
Validate with people who use this workflow before building.
Hypothesis 3
Enhance folder functionality with color coding and sorting options.
Assumption to check: Basic folder management
Validate with people who use this workflow before building.
Hypothesis 4
Allow shared editing and comments for collaborative note-taking.
Assumption to check: No collaboration features
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
Simple distraction-free text editor without any rich text nonsense. The simplicity is a feature. ■ Highlights - No formatting. Just text. - Edit any plain text file like .txt, .csv, .md, etc - Optimal line spacing and length - Word count - Brain dump mode ■ Known issues The app does not have the ability to print because of iOS limitations. Brain dump mode does not work properly with some Asian languages. ■ Brain dump mode Lets you only write, but not delete or edit. This helps you focus on the actual writing instead of getting distracted with editing and nitpicking. ■ FAQ ‣ Can you add a typewriter mode (centered text)? I don't plan to add that. ‣ Does it handle huge files? No. The app is optimized for writing. Use a proper code editor for such files. ■ Support You can contact me through the feedback button in the app.
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.
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BUILD KIT DIFFICULTY
Starter
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.
