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
Watch Reader - txt file
Watch Reader (Watch Reader) is a watch-only text viewer app.
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
3 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'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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Watch Reader - txt file: map the core Books 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
Expand to support more formats like PDF, EPUB.
Assumption to check: Limited file format support, only txt files
Validate with people who use this workflow before building.
Hypothesis 2
Add features like font size adjustment, themes.
Assumption to check: Lack of customization options for reading experience
Validate with people who use this workflow before building.
Hypothesis 3
Implement caching for offline reading.
Assumption to check: No offline support for uploaded files
Validate with people who use this workflow before building.
Hypothesis 4
Enhance sharing functionality to include social media.
Assumption to check: Limited sharing options
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
Watch Reader (Watch Reader) is a watch-only text viewer app. You can view the txt file you have by sending it to the watch. First check if you have a watch. (Supported from devices with WatchOS 9.0 or higher installed) It is possible to run the watch app alone, but The phone app is required to import files to the watch app. The steps to import the file are as follows. 1. The phone app checks some text contents in advance and waits to send the file to the watch app. 2. Launch the watch app and import the file to the watch app through “Import File”. 3. iPhone/iPad and Watch must be in close proximity when transferring files using the watch app. ** Watch App Features ** - Supported from devices with WatchOS 9.0 or higher installed (WatchOS 9.0+) - txt file - ePub: Display only text (not supported: image, audio, style (css), chapter) - Font: Watch default font - External font file: Transfer and apply font files in otf and ttf formats to the watch app - font size - letter spacing - line spacing - indent - Alignment (left, right, center, and justification are not supported) - Text color & recommended text color - Background color & recommended background color - Top information: Select one of non-display, progress, and battery - TTS: Background playback after Bluetooth connection - iCloud sync: sync last read location - App lock: If a password is set for the watch app - Clear all caches - Reset settings - Remove continuous blank lines from original file (automatic) - Remove blank lines - Remove a file from the watch app: Swipe left in the file list - App language: Auto / English / Japanese / Korean - Search (Location: Settings - Search) - Designate long-click operation: Unused/TTS/Search - App brightness - Internal speaker playback (background playback is not possible when the internal speaker is set) ** Phone App Features ** - Send files to the watch app - file management - Webdav, SMB, FTP, Synology NAS ** Search for "Watch Reader" on YouTube for a demonstration video
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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
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expo-document-picker
@supabase/supabase-js
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.
