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
Inkitt: Books, Novels, Stories
Discover thousands of new novels by indie authors and read them for free on Inkitt
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
9,779 ratings · Top 15%
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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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 Inkitt: Books, Novels, Stories: 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 a more personalized recommendation algorithm based on user reading history.
Assumption to check: Users often find it difficult to discover new stories that match their interests.
Validate with people who use this workflow before building.
Hypothesis 2
Provide better organizational tools, such as folders or tags for saved stories.
Assumption to check: Limited options for managing saved stories.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the UI by prioritizing key features and providing a cleaner layout.
Assumption to check: User interface can feel cluttered with too many elements.
Validate with people who use this workflow before building.
Hypothesis 4
Integrate social sharing options and community features to enhance user engagement.
Assumption to check: Lack of social features for sharing stories with friends.
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
Discover thousands of new novels by indie authors and read them for free on Inkitt. Join us on our mission to support aspiring authors taking their first steps towards publication! From Fantasy, Sci-Fi, Thriller, Mystery, Action and Adventure to Drama, Romance, Erotica, and YA, there are hand-picked novels from all genres on Inkitt! *** Most Downloaded Free Reading App in 5 countries. *** • Discover and read upcoming novels by indie authors for free (all novels in English) • Download novels and read them offline • Personalized reading recommendations based on your favorite fiction genres • Customizable background colors and fonts to meet your preferences • When reading a story, tap & hold to autoscroll Over 700,000 readers are reading indie novels on Inkitt. “The reading experience is much cleaner than on other platforms. I can really focus on the story, without distractions. I love it!” - Cynthia, Inkitt reader “Inkitt is by far the best place I have posted work and I have already told some friends about it. I will be submitting more” - Patrick, Inkitt author “I’ve discovered may great books on Inkitt! It’s for me the best app for reading books on iPad” - James, avid science fiction reader -- About Inkitt Inkitt is the perfect free app for reading books on iPhone and iPad, especially for avid readers who love discovering upcoming novels from new and talented authors on the go. All stories published on the Inkitt app are our readers’ top-picks. Books are our passion and we want to share it with you. Join us on our mission to support rising talent! More about Inkitt: www.inkitt.com. Interested in knowing more about upcoming titles, learning writing tips, and reading author interviews? Visit our blog on www.inkitt.com/blog.
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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
React Native
Expo
Supabase
Zustand
React Navigation
Axios
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.
