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
Kobo Books & Audiobooks
Get ready for a whole new way to read eBooks your way! We've rebuilt the Kobo Books App from the ground up, focusing on what matters most: you and your love of the story, whether you read, listen, or are just dropping by.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
27,342 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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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.
JavaScript is required to complete mailbox verification.
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 Kobo Books & Audiobooks: map the core Books workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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 recommendation algorithms based on user preferences.
Assumption to check: Limited content discovery and recommendations
Validate with people who use this workflow before building.
Hypothesis 2
Ensure a cohesive design standard throughout the app.
Assumption to check: Inconsistent user interface across screens
Validate with people who use this workflow before building.
Hypothesis 3
Introduce social sharing options to enhance user engagement.
Assumption to check: Lack of social features for sharing books
Validate with people who use this workflow before building.
Hypothesis 4
Streamline the purchase process to reduce annoyance.
Assumption to check: High number of in-app purchase prompts
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
Get ready for a whole new way to read eBooks your way! We've rebuilt the Kobo Books App from the ground up, focusing on what matters most: you and your love of the story, whether you read, listen, or are just dropping by. Dive into millions of eBooks and audiobooks, all tailored to your reading life. Customize, sync, scroll seamlessly, and discover stories that stay with you, all in one powerful app. Rediscover the joy of reading your way Kobo seamlessly blends eBooks, audiobooks, and intuitive tools into your daily rhythm. From cozy nights to busy commutes, we keep your place, your pace, and your story alive. Read and listen seamlessly Customize fonts, enjoy Night Mode, set a sleep timer for audio playback, and experience natural-sounding text-to-speech for hands-free reading! Read Aloud available on select eBooks only. Explore before you dive in Our Guest Mode lets you browse books, save previews, and discover your next favourite read, all without any Kobo account required. Pick up where you left off Your bookmarks, highlights, and notes sync automatically across phone, tablet, Kobo eReader, or Kobo Web Reader, so your story always stays with you. Designed for real life From road trips with CarPlay to daily routines with our new Listen Bar, Kobo fits seamlessly into your day. Read in 13 languages including English, French, Spanish, German, Portuguese, Italian, Dutch, Turkish, and more. Why Kobo? Whether you’re into bestsellers, romance, thrillers, self-development, or audiobooks for your next run, Kobo’s intuitive app helps you rediscover the joy of storytelling. Download the Kobo Books App and fall in love with reading all over again. Explore, highlight, review, read and listen your way, with full support for iOS accessibility features.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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
React Navigation
Axios
React Native Async Storage
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.
