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.
Vocal Strength Trainer (VST), from Ryan Wall and Endless Vocals with Jaime Vendera, brings Raise Your Voice training into one focused iPhone and iPad app.
$9.99
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
Your first Build Kit is free with a verified email.
Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
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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.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Vocal Strength Trainer (VST), from Ryan Wall and Endless Vocals with Jaime Vendera, brings Raise Your Voice training into one focused iPhone and iPad app. BUILD A GUIDED SESSION Choose warmups, Vocal Power scales, ISO exercises, songs, and cooldowns. Set ranges and tempo, then move through each stage in order. TRAIN PITCH AND CONTROL Use a responsive tuner, reference tones, an eight-octave keyboard, a scale generator with 70+ patterns, breathing exercises, a metronome, timers, a dB meter, and the Glass Challenge. PRACTICE REAL SONGS Choose songs from your Music library or import audio files, organize lyrics, rehearse, and capture audio or video takes. Practice media stays on your device unless you choose to export or share it. TRACK THE WORK Save sessions, review practice history, schedule reminders, log vocal habits and water, and use Home Screen widgets for quick check-ins. DRIVING MODE Set up and start a hands-free session before driving. Driving Mode disables microphone features, recording, camera, mixing, and Vocal Stompboxes, and keeps supported session audio playing with system media controls. Do not interact with your phone while driving. OPTIONAL ONE-TIME PURCHASES • Vocal Stompboxes: fourteen one-knob effects for live monitoring and recording playback, available individually or through the Complete Vocal Stompbox Board • RoomReach: a separately purchased room-control pedal that learns steady room noise to focus compatible live microphone monitoring • Scale Builder: create and save longer transposable scales and exact-note sequences No account is required. Core practice tools are included with the app. Optional features are permanent non-consumable purchases and can be restored with the Apple Account used to buy them. Designed for iPhone and iPad running iOS or iPadOS 17 or later. Built by Endless Vocals × Jaime Vendera.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
Not assessed in a Build Kit yet.
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.