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.
corpán is a multilingual language-learning app for real-world fluency — sentence by sentence, at your own pace.
$1.99 · 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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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 Corpán: 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 variety of exercises can make learning repetitive
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of social interaction features can be isolating
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No offline access for exercises can hinder learning on the go
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Minimal progress tracking 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.
corpán is a multilingual language-learning app for real-world fluency — sentence by sentence, at your own pace. learn and practice in **27 languages** across **29 scripts** (punjabi + mandarin each support two scripts): arabic, bengali, chinese (simplified), chinese (traditional), english, french, german, gujarati, hindi, hungarian, indonesian, italian, japanese, kannada, korean, marathi, persian, polish, portuguese (brazil), punjabi (gurmukhi), punjabi (shahmukhi), russian, spanish, tamil, telugu, thai, turkish, urdu, and vietnamese. corpán is also **fully localized** — the interface, onboarding, and settings are available in every supported language. key features: • learn from any language: set your native language and study from your perspective (not just “from english”). • massive real-world corpus: practice with **30,000+ sentences**, including **5,000+ beginner (a1) phrases** for daily life, travel, work, and more. • instant audio: tap any sentence to hear clear pronunciation using your device’s best text-to-speech voices. • multilingual learning: learn multiple languages in parallel and switch your primary language anytime. • domain + level filters: focus on what matters (topics + cefr levels). • romanization option: turn it on when it helps, off when you’re ready to read the script. • offline-friendly: local-first sentence library, and audio works offline if your device has offline voices installed. now with **developer mode** — and a whole new way to learn: corpán is becoming modular. developer mode unlocks **packs**: add-ons that deliver new experiences, games, and curated content without bloating the core app. launch free games directly from the app, including: • **hanzipan** — a fun way to practice and recognize **chinese characters** • **hover runner** — a juicy 3d learning game you can jump into instantly and we’re just getting started: • **new experiences drop every week** • new games, new learning modes, new content — delivered through packs want to go further? build your own: corpán includes a packs / games sdk so creators can build their own language-learning experiences — powered by the sentence corpus + native tts — and play them inside corpán. built for focus: • clean, distraction-free design • no clutter, no noise — just practice whether you’re learning for travel, work, school, or fun, corpán helps you build real fluency with repeatable daily practice — and gives you a growing library of games and experiences through packs. start learning with corpán today.
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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.