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.
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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.
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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 Langua: AI language learning: map the core Education 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 language options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Inconsistent lesson quality
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of community features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No offline access for lessons
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.
We're dedicated to building the world's best AI app for language learning. Traditional apps build vocabulary. Langua builds confidence to speak - through immersive practice with intelligent AI that sounds authentic, corrects naturally, and adapts to your level. WHY LEARNERS CHOOSE LANGUA Maria C.: "I LOVE Langua! I've been using it daily for months. The chat feature is fantastic - it feels like talking to a real, empathetic language partner who corrects me and suggests more advanced phrasing. It's pressure-free and I'm encouraged by how much I'm improving both my intermediate German and my more basic Italian. I taught French for 27 years and have learned Spanish on my own in recent years. This is a fantastic tool for practicing speaking." Guy S: "Langua's AI is very sophisticated and, so far at least, not at all robotic. The conversations feel authentic. The AI provides very helpful feedback on each conversation and gives tips for improvement. Langua is invaluable for language learners like me who can't frequently visit the country where their target language is spoken." Featured in The Guardian and recommended by leading polyglots including Luca Lampariello, Olly Richards and English with Lucy. THE BEST AI FOR LANGUAGE LEARNING THROUGH CONVERSATION Unlike apps that rely on multiple choice or scripted dialogues, Langua uses advanced conversational AI that lets you express yourself freely across 20+ languages: • Unlimited speaking practice with remarkably realistic AI characters - many cloned from YouTubers we partner with. Choose from multiple dialects. • Call Mode for hands-free practice: Have real-time voice conversations while driving, walking, or relaxing. No typing needed. • Instant corrections with explanations: Get feedback in one tap or review detailed reports after each chat. • Speak your native language when stuck: Can't find the right word? Switch languages mid-conversation and the AI will help you learn the phrase. • Huge conversation library: Roleplays, debates, grammar practice, vocabulary building, or free conversation about your interests. ADAPTS TO ALL LEVELS Whether you're just starting or already conversational, Langua adapts to you. Zero pressure to perform perfectly - our intelligent support features let you converse confidently at any level: • Reply suggestions when you're not sure what to say • Instant translations with usage examples • Innovative guided conversation course for beginners Advanced learners enjoy sophisticated conversations with cultural insights and colloquial expressions to break through the intermediate plateau. Practice freely, make mistakes, and learn in a judgment-free environment. BUILD VOCABULARY THAT STICKS • Get instant translations with usage examples and similar phrases • Save words and let the AI weave them into chats • Master vocabulary with spaced repetition flashcards • Read AI stories packed with your saved words for reinforcement REAL RESULTS Join thousands of language learners who practice daily with Langua. Our members consistently report faster progress in speaking confidence compared to traditional apps. TRY FOR FREE Start with a free conversation, then unlock unlimited practice with our risk-free trial. Discover why learners worldwide trust Langua for their daily speaking practice. Need help? Our support team (real humans!) is ready to answer your questions and help you succeed. AVAILABLE LANGUAGES: AI for English • AI for Spanish • AI for French • AI for German • AI for Italian • AI for Portuguese • AI for Dutch • AI for Swedish • AI for Romanian • AI for Russian • AI for Greek • AI for Turkish • AI for Danish • AI for Norwegian • AI for Finnish • AI for Polish • AI for Czech • AI for Croatian • AI for Japanese • AI for Chinese • AI for Korean • AI for Hindi Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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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.