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.
App Overview
FanFiction.Net
Official app for FanFiction.Net is now on iOS!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 2.5
836 ratings · Below Average
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included18 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for FanFiction.Net: map the core Books workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Implement advanced filters and sorting options.
Assumption to check: Limited search filters lead to difficulty in finding specific stories.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance UI design for better readability and aesthetics.
Assumption to check: User interface is cluttered and not visually appealing.
Validate with people who use this workflow before building.
Hypothesis 3
Conduct user research to identify pain points and improve features.
Assumption to check: Low app rating indicates user dissatisfaction.
Validate with people who use this workflow before building.
Hypothesis 4
Prioritize performance optimization and thorough testing.
Assumption to check: Inconsistent performance and bugs reported.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Official app for FanFiction.Net is now on iOS! * Read - Access millions of stories for free * Write - Edit and Publish your stories on the go * Text to Speech - Turn stories into audio books * Translation: Read stories translated into your native language via our AI engine * Syncing - Library/Downloaded syncing between devices * Dictionary - Multi-language dictionary lookup * Forums - Join writing groups or make friends with millions of other readers and writers. * Push - Push notifications for Followed/Downloaded stories * Private Messaging - Enjoying private communication with other users. Send text, image or voice messages. * Community Archives - Start or browse story archives . * Beta Readers - Browse and search for registered beta readers. * Story Management - Browse and manage your favorites and follows. * User Management - Browse and manage your favorites, follows, and others. Please note Private Messaging (PM) feature is currently app to app only. PM site integration is coming soon in a future release. Please email all feedback and bug reports to [email protected].
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
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Expo
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BUILD KIT DIFFICULTY
Expert
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.
