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.
a nonprofit building tools for an open internet
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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 Lantern: Fast, Secure VPN: 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: Slow connection speeds reported by users
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Inconsistent user interface
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited server options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Confusing subscription management
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.
a nonprofit building tools for an open internet we're a nonprofit with one mission: keeping the internet open for everyone, everywhere. we've spent 12 years developing connection technologies in the world's most demanding network environments. every pro subscription directly funds access for people who need it most. most "free" vpns want your email before you've even tried them. we don't. no account. no credit card. just download and connect. your server, your rules want zero middlemen? host your own vpn server on infrastructure you control. your traffic, your hardware, your rules. setup takes minutes. or connect through lantern's global network. either way, you're in control. engineered for reliability we've spent 12 years building connection tools for the hardest network conditions on the planet. that work shows up everywhere: more protocols than typical vpns, smarter routing, fewer dropped connections. when standard approaches don't work, lantern has alternatives ready. privacy you can verify • open source code, publicly available • strict no-logs policy • strong encryption on all connections • nonprofit structure with transparent funding honest about what vpns do we don't sell fear. vpns protect your privacy and help you access the internet freely. no hype. just protection that works. pro features • unlimited data • connect up to 5 devices • built-in ad blocking • premium server access • private server hosting at no extra cost why a nonprofit vpn? we're funded by subscriptions, not by selling data or running ads. we're accountable to our mission, not shareholders. • 12+ years of proven reliability • tested in demanding environments worldwide • research-driven development • community-supported and mission-focused free plan available try lantern without creating an account or entering payment info. just download and connect. pro subscriptions unlock unlimited data and directly support accessible internet worldwide. try the vpn built by a nonprofit that believes in an open, accessible internet for everyone. terms of use: https://lantern.io/terms privacy policy: https://lantern.io/privacy service availability may vary by region due to local regulations.
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.