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.
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 Mango Languages: 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 free content compared to paid options
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficulty tracking progress across multiple languages
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of community features for learners
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Inconsistent lesson quality across languages
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.
Ready to have real conversations? Mango Languages prioritizes real language, real culture, and real progress. Our comprehensive learning platform offers conversational language lessons in 70+ languages, teaching vocabulary, pronunciation, grammar, and culture simultaneously. From preparing for vacation or working abroad, to personal development and academic growth, our language courses are designed to take you wherever you wish to go. HOW DOES MANGO WORK? Learn languages from native speakers with courses that feature thousands of real recordings. Enhance comprehension with interactive listening and reading activities and bolster your learning with personalized daily reviews. Refine speaking skills with phonetic spellings, natural and slow pronunciations, and our pronunciation comparison tool. Sync progress across all platforms and NO ADS, so you can learn anywhere, at any time, with no distractions. WHY CHOOSE MANGO? Practical, Authentic Content: The outcome of using Mango is the ability to speak and communicate in real conversations. Linguist-Approved Language Courses: Each course is designed by expert linguists to provide high-quality instruction that produces real results. Placement Tests: Not sure where to start? Use our placement tests in select languages to identify the best starting point. Individualized Review: Our intelligent review system helps you retain knowledge through spaced repetition and adapts to your progress. Practice with Flashcards: Supercharge your vocabulary with built-in flashcards or take it a step further and create your own lists! On-The-Go Learning: Download lessons to your phone for offline access and take advantage of our hands-free audio feature! HOW CAN I START? When you sign up, you can find free access through a subscribing organization, like a public library, or you can subscribe with a 14-day free trial. Cancel at any time. Serious about language learning? Our paid subscriptions include: Individual Plan: Access to all of our languages in one learning profile. Family Plan: Access to all of our languages for you and up to five additional family members. For questions or feedback, please contact [email protected] Available Courses for English Speakers: • Arabic (Egyptian) • Arabic (Iraqi) • Arabic (Levantine) • Arabic (Modern Standard) • Armenian • Azerbaijani • Bengali • Chaldean Aramaic • Chinese (Cantonese) • Chinese (Mandarin) • Croatian • Czech • Cherokee • Danish • Dari • Dutch • Dzongkha • Filipino (Tagalog) • Finnish • French • French (Canadian) • German • Greek • Greek (Ancient) • Greek (Koine) • Haitian Creole • Hawaiian • Hebrew (Modern) • Hebrew (Biblical) • Hindi • Hungarian • Icelandic • Igbo • Indonesian • Irish • Italian • Japanese • Javanese • Kazakh • Korean • Latin • Malay • Malayalam • Norwegian • Pashto • Persian (Farsi) • Polish • Portuguese (Brazilian) • Potawatomi • Punjabi (Pakistani) • Romanian • Russian • Scottish Gaelic • Serbian • Shanghainese • Slovak • Spanish (Castilian) • Spanish (Latin American) • Swahili • Swedish • Tamil • Telugu • Thai • Turkish • Tuvan • Ukrainian • Urdu • Uzbek • Vietnamese • Yiddish Available Courses to Learn English: • English for Arabic (Egyptian) Speakers • English for Arabic (Modern Standard) Speakers • English for Armenian Speakers • English for Bengali Speakers • English for Chinese (Cantonese) Speakers • English for Chinese (Mandarin) Speakers • English for French Speakers • English for German Speakers • English for Greek Speakers • English for Haitian Creole Speakers • English for Hmong Speakers • English for Italian Speakers • English for Japanese Speakers • English for Korean Speakers • English for Polish Speakers • English for Portuguese (Brazilian) Speakers • English for Russian Speakers • English for Somali Speakers • English for Spanish (Latin American) Speakers • English for Turkish Speakers • English for Vietnamese Speakers https://mangolanguages.com/legal/terms-and-conditions/
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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.