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
Spanish Translator Pro
The fastest way to translate between Spanish and English — no limits, no subscriptions, just translation.
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
289 ratings · Top 15%
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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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 Spanish Translator Pro: map the core Travel 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 language options to include more languages.
Assumption to check: Limited language options beyond Spanish and English.
Validate with people who use this workflow before building.
Hypothesis 2
Implement offline translation features.
Assumption to check: No offline translation capability.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to save commonly used translations.
Assumption to check: Lack of user-defined vocabulary or favorites.
Validate with people who use this workflow before building.
Hypothesis 4
Offer an ad-free premium subscription.
Assumption to check: In-app ads can disrupt user experience.
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
The fastest way to translate between Spanish and English — no limits, no subscriptions, just translation. Type, speak, or snap a photo of any text and get an instant translation powered by advanced AI. Switch between Professional and Casual tone to match any situation — a business email or a conversation with a local. Hear the translation spoken aloud in your choice of male or female voice. Features - Translate between Spanish, English, French, Portuguese, and more - Speak to translate — just tap the mic and start talking - Camera OCR — point at a sign, menu, or document and translate it instantly - Text-to-speech playback with voice selection - Professional and Casual tone modes - Side-by-side tone comparison - Thread mode for back-and-forth conversations - Phrasebook with hundreds of essential phrases, organized by category - Full translation history with favorites - Large text view — show your phone to someone who speaks the language - Daily word reminder to build your vocabulary - Works with iPhone and iPad
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
Zustand
Axios
React Navigation
Expo Speech
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.
