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.
Make your own flash cards and take the pressure out of test preparation
$4.99 · 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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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 Flashcard Hero: 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 collaboration features for sharing decks.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No gamification elements such as streaks or rewards.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchases can be confusing to users.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of customization for flashcard design.
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.
Make your own flash cards and take the pressure out of test preparation. Flashcard Hero keeps track of what facts you already know so you can focus on what you don’t know and save a lot of time. We made Flashcard Hero for those of you who want to fit more than a few words on each card. You can add images, lists, and use text formatting to structure your content. - Write cards on your iPhone/iPad - Add images - Group cards into topics - Text formatting & lists - Find and study only difficult cards - iCloud Drive support (syncs with the Mac app, which is a separate purchase) Study Options: - Memorizing cards by covering the answer - Multiple Choice tests with randomly picked or predefined answers - Supports studying with the Spaced Repetition System (Leitner Box System) For Teachers and Educators: - Compatible with the Remote Control feature of the Mac app. You can use the iOS app as a remote to control the study mode on the Mac while you are projecting on a big screen. People use the Flashcard Hero Mac & iOS apps to study many different subjects. Here’s a short list of the most popular subjects based on the over 2 million cards that users have shared among each other so far: - Medicine (anatomy, physiology, pharmacology, genetics) - Psychology - Law & business administration (economics, marketing, international law) - History and politics - Languages (Latin, Chinese, Greek, Italian, Spanish, German) - Social sciences - Music and music theory - Space physiology (how cool is that?) - Many more… You see a lot of subjects in the top ranks where people have to memorize a lot of “structured” information. That’s because Flashcard Hero is designed specifically to go beyond language learning, offering more room on each card for facts, lists, and images. You can also organize cards into topics (to match chapters of a text book, for example). Note: This app is a single, one-time purchase. No subscriptions, no in-app purchases, no ads. The App Store might list the app as having in-app purchases, but those are only for backwards compatibility with an earlier version of the app. With this download, you get all features right away.
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.