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.
TextFree is the first—and still the best—free phone number app
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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 Text Free: Second Phone Number: map the core Social Networking 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: Ads can disrupt user experience
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Occasional message delivery issues
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited customization for notifications
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.
TextFree is the first—and still the best—free phone number app. Join the hundreds of millions of people who use TextFree for free, unlimited calling and texting. TextFree is easy to use and boasts a list of features you won’t get from other apps. Choose a local phone number with unlimited calling and texting. Send photos, videos, GIFs, audio messages, emojis, and PDFs. Custom ring and text tones make it easy to identify when your TextFree number is ringing, and custom wallpapers let you personalize your experience. Need more features? Upgrade to TextFree Plus to remove ads and get unlimited access to verification codes for online accounts. You’ll also lock in your number so it won’t change or expire while you’re subscribed—unless you choose to change it yourself. TEXTFREE FEATURES - Select a free phone number with an area code of your choice - Choose from a bank of custom number combinations - Unlimited calls & texts let you communicate for free over WiFi - Share photos, videos, and GIF messages - Send and receive audio messages, emojis, and PDFs - Use group texting to stay in touch with friends and family - Automatically respond to calls and texts with Auto-Reply - Assign custom ring and text tones to your TextFree number - Personalize your experience with custom wallpapers - No phone? No problem—get TextFree on your iPod, iPad, or computer. - Access 24/7 Customer Support TEXTFREE PLUS FEATURES - All standard TextFree features, plus… - Unlock verification shortcodes to validate online accounts and apps - Enjoy an ad-free experience - Reserve your phone number to prevent it from expiring - Change your phone number as often as needed - Silence spam & send it to voicemail FREQUENTLY ASKED QUESTIONS Is TextFree really free? Yes—your number, texting, and calling are all free. TextFree is ad-supported, which is how we're able to offer it at no cost, but if you'd rather go ad-free (and get more features), TextFree Plus has you covered. Does TextFree give you a real phone number? A TextFree number is a dialable U.S. or Canadian phone number with its own area code. It runs over Wi-Fi or data rather than a traditional carrier plan, but works just like one for texting and calling. Does TextFree work without a phone plan? Yes. TextFree runs on Wi-Fi or mobile data—no carrier required. As long as you have an internet connection, you're good to go. Is TextFree private and secure? TextFree doesn't sell or share your information with third parties or use your messages to train AI models. Our servers are encrypted to keep your data secure. For full details, see our privacy policy. Who is TextFree for? TextFree is for anyone who needs a phone number without the cost or commitment of a carrier plan—plus anyone who wants a second number for side hustles, online marketplaces, or anywhere they'd rather not share their real digits. Do I need to provide a government-issued ID to create a TextFree account? No. You do not need to submit a government-issued ID to sign up for TextFree. To create an account, you'll need to verify your email address or sign in using a supported Google or Apple account. Download TextFree today and try it! LEGAL © 2026 Pinger, Inc. All rights reserved. The TextFree name, associated trademarks, and logos are trademarks of Pinger, Inc. or related entities. Terms of Service: https://www.pinger.com/privacy-policy/terms-and-conditions/ Privacy Policy: https://www.pinger.com/privacy-policy/ Subscriptions are automatically billed monthly or annually to your iTunes Account and auto-renew unless you turn off auto-renew at least 24-hours before the end of the current period. Payments are charged to your iTunes account upon confirmation of purchase. You can turn off auto-renew or manage subscriptions in your iTunes & App Store account settings. Cancellations take effect at the end of the active subscription period. Any unused portion of a free trial period (where available) is forfeited when purchasing a subscription.
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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.