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.
Learn Korean, Japanese and Spanish by speaking from the start!
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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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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 Teuida: Learn Languages: 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 offline functionality makes it difficult to learn on the go.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Some users find quizzes too challenging without enough context.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Subscription model may deter casual users.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of personalized learning paths.
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.
Learn Korean, Japanese and Spanish by speaking from the start! Practice speaking essential expressions in first-person POV scenarios. =========== • "But I can just learn Spanish, Korean and Japanese by watching Netflix!?” Just like if you were learning how to swim, you’d go into a pool instead of watching videos of Michael Phelps swimming. You can't learn Korean by listening to NewJeans or speak Spanish by singing Despacito. Don't get us wrong. We love music. But if your goal is to ACTUALLY SPEAK, you have to, well – SPEAK! TEUIDA's first-person POV conversations will get you speaking everyday expressions in real-life scenarios. • 3 min > 30 min We believe that 3 minutes of actual speaking will help you more than 30 minutes watching someone else speak (long lecture videos). Why waste your precious time learning about a language when you can learn by speaking it yourself? Our interactive lessons not only get you to speak with the tutors but gives instant feedback on your pronunciation. • Overcome fear of speaking Research shows that one of the greatest barriers to speaking a language is confidence. After all, what's the point of knowing all the grammar rules and verb conjugations if you can't speak when the moment comes? TEUIDA helps you overcome fear of speaking by simulating real-life scenarios but without all the social anxiety. (i.e. Our characters won't throw shade at you for mispronouncing!) =========== Here’s a list of things that make TEUIDA different: • Essential expressions: No more weird, awkward phrases (translated by bots) that no one actually use in real life. (Let's be honest, when was the last time you had to say "I am a boy, you are a woman" in real-life?) • Effective curriculum: Once you master our curriculum, you will be able to know the basic vocabularies, grammars and of course, speak to your friends in Korean, Japanese, and Spanish! • Taught by Bilingual Tutors: Our crazy selection of fully bilingual tutors not only speak Korean and Japanese but understand where you’re coming from. They know exactly what to teach you because they've been in your shoes! • AI Pronunciation Analysis: What's the point of repeating sentences aloud if you can't tell whether you're pronouncing it right? TEUIDA has a convenient voice recognition system that will give instant feedback on your pronunciation. • Fun, Interactive Stories: We believe that learning and fun are not mutually exclusive. In fact, learning is most effective when it's fun! You'll find yourself laughing, screaming and at times even cringing with the characters. • Real-life Scenarios: Real-life everyday situations! Everything from ordering a drink at the cafe to asking for directions! • Culture-specific tips: A wise man once said that "the person who learns language without learning culture risks becoming a fluent fool". We believe understanding culture is the key to learning language. So we hand-selected each scenario to reflect the culture-specific elements of that specific culture! So... what are you waiting for? Stop reading and start speaking with TEUIDA! =========== Please note you will need a TEUIDA Premium plan in order to access all content and exclusive features. Terms of Use: https://www.teuida.net/terms Privacy Policy: https://www.teuida.net/privacy =========== Contact Developer: Business address: 5th floor, 165, Yeoksam-ro, Gangnam-gu, Seoul, Republic of Korea Contact: +82 10-4590-3154
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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.