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.
Google Voice gives you a phone number for calling, text messaging, and voicemail
Free · In-app purchases
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.
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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.
Rork plan preview for Google Voice: 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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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
Assumption to check: Limited international calling options
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Occasional call quality issues
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: User interface can be cluttered
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited customization options
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Google Voice gives you a phone number for calling, text messaging, and voicemail. It works on smartphones and computers, and syncs across your devices so you can use the app in the office, at home, or on the go. NOTE: Google Voice only works for personal Google Accounts in the US and Google Workspace accounts in select markets. Text messaging is not supported in all markets. You’re in control Get spam filtered automatically and block numbers you don’t want to hear from. Manage your time with personalized settings for forwarding calls, text messages, and voicemail. Backed up and searchable Calls, text messages, and voicemails are stored and backed up to make it easy for you to search your history. Manage messages across devices Send and receive individual and group SMS messages from all your devices Your voicemail, transcribed Google Voice provides advanced voicemail transcriptions that you can read in the app and/or have sent to your email. Save on international calling Make international calls at competitive rates without paying extra for international minutes with your mobile carrier Keep in mind: • Google Voice is currently only available in the US. Google Voice for Google Workspace users is available in select countries. Check with your administrator for access. • Calls made using Google Voice for iPhone can be placed through a Google Voice access number. All access number based calls use the standard minutes from your cell phone plan and may incur costs (e.g. when traveling internationally).
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.
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.