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
Talkbox Synth by ElectroSpit
Talkbox Synth by ElectroSpit is designed from the ground up for playing talkbox on the ElectroSpit ESX-1 mobile talkbox or any traditional talkbox, and comes with the perfect talkbox sound
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 Talkbox Synth by ElectroSpit: map the core Music 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
Offer a wider variety of sound packs and customizable effects.
Assumption to check: Limited sound libraries and effects.
Validate with people who use this workflow before building.
Hypothesis 2
Implement sharing features to collaborate on projects.
Assumption to check: No collaboration features.
Validate with people who use this workflow before building.
Hypothesis 3
Provide in-app tutorials and guided sound creation.
Assumption to check: Steep learning curve for beginners.
Validate with people who use this workflow before building.
Hypothesis 4
Consider a subscription model for continuous updates and features.
Assumption to check: Requires in-app purchases for advanced 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
Talkbox Synth by ElectroSpit is designed from the ground up for playing talkbox on the ElectroSpit ESX-1 mobile talkbox or any traditional talkbox, and comes with the perfect talkbox sound. The user interface is optimized for playing pro-quality melodies with a keyboard layout that lets you fly. 30 keys on your phone screen give you more room to express yourself. Easily add vibrato, modulation and pitch bends by dragging your fingers side to side or with the on screen pitchbend and modulation wheels to increase the funk and soul in your talkbox sound. No musical training? No problem! Just slide your finger on the Jam Stack and get funky. The intuitive Jam stack allows you to improvise in one of 9 popular scales in any key. Technical Features: -Classic Sawtooth Talkbox Sound -30 key chromatic keyboard -Octave Transpose -Key Transpose -Pitchbend Wheel -Modulation Wheel -Portamento -Glide Time -9 Popular Scales like Blues and Pentatonic -Fine Tuning -works with ESX-1 Mobile Talkbox or any traditional talkbox ### Device Compatibility Requires iOS 15.0 or later. **iPhone:** - iPhone 6s and later - iPhone SE (1st generation and later) **iPad:** - iPad Air 2 (2014) - iPad 5th generation (2017) - iPad mini 4 (2015) - iPad Pro (all models)
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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
React Navigation
expo-sound
@react-native-async-storage/async-storage
react-native-gesture-handler
BUILD KIT DIFFICULTY
Advanced
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.
