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 elementary Japanese words at your own pace!
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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 GENKI Vocab for 3rd Ed.: 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 vocabulary categories and words
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: User interface is not very engaging
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Subscription model unclear
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No social features for learners
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 elementary Japanese words at your own pace! GENKI Vocab for 3rd Ed. is an app that enables users to learn more than 1,200 words essential for beginners. This is the official iPhone app for the 3rd edition of GENKI: An Integrated Course in Elementary Japanese, a best-selling series of Japanese learning materials boasting more than 3.5 million copies sold worldwide. Advantages ◆Users can view the words and listen to the recordings as they like, enabling them to study at their own pace. ◆By repeating a process of memorization and self-checking, learners can firmly master important beginning-level vocabulary. ◆Words already memorized are progressively removed from the study set, so users can concentrate on just the words that challenge them, making for a more efficient approach to learning. *This app will not play audio if your device is in Silent mode (Vibrate mode). To hear the audio, please turn Silent mode off. Study methods and functions This app has three main modes: Study, Check, and List. ◇ "Study" allows users to view the words, their meanings, and the example sentences over and over, so they can take their time learning. ・Audio recordings of all words and example sentences are provided with natural pronunciations by native speakers of Japanese. ・Fun illustrations help users to better retain the words studied. ・Users can bookmark the words they like. The bookmarked words are compiled in the Bookmark list in "List." ◇ “Check” helps learners to track their mastery. ・Users check their understanding of the vocabulary studied and sort the words into those mastered and those not yet retained. ・The words already mastered are taken out of the study set, leaving behind just those that still need to be worked on. ◇ “List” displays a list of all words covered by the app so that users can see their progress and review the vocabulary. ・The list can be arranged in any of three orderings: lesson order, a-i-u-e-o order, and alphabetical order. The words bookmarked in the Study mode are also listed in the Bookmark list. ・Checkmarks are automatically placed next to words that have been mastered. ・The Study view of words can be displayed from the list entries, enabling quick review. ○This app is based on the vocabulary from the third edition of GENKI. ○Ads: The app does not display any ads that might interfere with learning.
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.