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
txt.edit - Simple Text Editor
WHAT'S NEW IN v2.0
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
24 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 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/
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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 txt.edit - Simple 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
Add more formatting tools and customization features.
Assumption to check: Limited formatting options compared to advanced editors.
Validate with people who use this workflow before building.
Hypothesis 2
Implement folder structures and tagging for easier file management.
Assumption to check: Difficult file organization for large projects.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate cloud storage solutions for backup and accessibility.
Assumption to check: No cloud sync options.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance UI design with modern aesthetics and themes.
Assumption to check: Basic user interface may feel outdated.
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
WHAT'S NEW IN v2.0 • Multiple tabs - Edit several files simultaneously • Custom fonts - Choose your perfect typeface and size • Line numbers - Professional code editing • Modern redesign - Beautiful, intuitive interface WHY TXT.EDIT? • 191 programming languages with syntax highlighting • 242 beautiful themes for any mood or workflow • iCloud integration - Access files anywhere • Zero ads, zero subscriptions - Pay once, own forever • Files app integration - Work with any cloud service POWER FEATURES • Syntax highlighting for HTML, JavaScript, JSON, Markdown, Swift, Python, PHP, YAML, and 183 more • Open and save files from iCloud, Dropbox, Google Drive • Search and replace • Customizable fonts and sizes • Professional line numbers • Multiple encoding support Perfect for developers, writers, students, and anyone who values clean, distraction-free text editing. One-time purchase. No subscriptions. No ads. Just pure text editing.
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
React Navigation
Async Storage
Zustand
React Native Reanimated
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.
