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
Text to Speech Pro
Type it, tap play, and hear it spoken
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.8
33 ratings · Top 50%
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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Combine features and design from your favorite apps.
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What's included17 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 Text to Speech Pro: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Type it, tap play, and hear it spoken. Text to Speech turns your words into natural-sounding speech with over 250 voices in 64 languages and accents. Use it to speak for you in person or on a phone call, to hear how a word is pronounced, or to turn your writing into an audio file. FEATURES - Over 250 voices in 64 languages and accents, including enhanced and premium quality voices - Use your own Personal Voice (iOS 17 or later) - Works offline, no internet needed - Adjust the rate and pitch - Speak as you type - Highlight words as they are spoken - Star your favourite phrases and sort them into folders - Sync your phrases between iPhone and iPad with iCloud - Mix speech into phone calls - Export speech as audio files - Keep listening in the background LANGUAGES & ACCENTS Arabic: World Bangla: India Basque: Spain Bhojpuri: India Bulgarian: Bulgaria Cantonese: Hong Kong Catalan: Spain, Valencia Chinese: Mainland China, Liaoning, Shaanxi, Sichuan, Taiwan Croatian: Croatia Czech: Czechia Danish: Denmark Dutch: Belgium, Netherlands English: Australia, India, Ireland, Scotland, South Africa, United Kingdom, United States Finnish: Finland French: Belgium, Canada, France Galician: Spain German: Germany Greek: Greece Hebrew: Israel Hindi: India Hungarian: Hungary Indonesian: Indonesia Italian: Italy Japanese: Japan Kannada: India Korean: South Korea Malay: Malaysia Marathi: India Norwegian Bokmål: Norway Persian: Iran Polish: Poland Portuguese: Brazil, Portugal Romanian: Romania Russian: Russia Shanghainese: Mainland China Slovak: Slovakia Slovenian: Slovenia Spanish: Argentina, Chile, Colombia, Mexico, Spain Swedish: Sweden Tamil: India Telugu: India Thai: Thailand Turkish: Türkiye Ukrainian: Ukraine Vietnamese: Vietnam GOOD TO KNOW - Download more voices, and higher-quality versions, in Settings > Accessibility > Read & Speak > Voices. - Which voices are available depends on your iOS version.
Written user reviews are not shown here. Check current App Store reviews >
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
Offer more diverse and natural-sounding voice options.
Assumption to check: Limited voice options in text-to-speech apps
Validate with people who use this workflow before building.
Hypothesis 2
Implement better performance and UI for long text processing.
Assumption to check: Poor handling of long texts
Validate with people who use this workflow before building.
Hypothesis 3
Provide better controls for playback speed and pausing.
Assumption to check: Inconsistent playback control features
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize voice parameters like pitch and volume.
Assumption to check: Lack of customization for users
Validate with people who use this workflow before building.
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
Supabase
expo-speech
Zustand
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.
