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
Crunchyroll
WATCH THE MOST POPULAR AND TOP-RATED ANIME ANYTIME, ANYWHERE
Free · In-app purchases
OVERALL US RANK
#15
Grossing · all categories
REVENUE (Est)
$1.8M/mo
$1.1M - $2.5M
RATING
★ 4.8
1,493,874 ratings · Top 5%
Evidence scope: #15 is the current overall US Grossing chart position. 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
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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/
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.
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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 Crunchyroll: map the core Entertainment 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 adaptive bitrate streaming for smoother playback.
Assumption to check: Frequent buffering and loading times during video playback
Validate with people who use this workflow before building.
Hypothesis 2
Enhance offline capabilities by allowing more content to be downloaded.
Assumption to check: Limited offline download options
Validate with people who use this workflow before building.
Hypothesis 3
Improve continue watching sync across devices.
Assumption to check: Inconsistent watch history and syncing issues
Validate with people who use this workflow before building.
Hypothesis 4
Offer a more balanced ad experience with fewer interruptions.
Assumption to check: Overwhelming ads in the free version
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
WATCH THE MOST POPULAR AND TOP-RATED ANIME ANYTIME, ANYWHERE Stream new episodes, classic favorites, and anime movies with the Crunchyroll app. Whether you love action-packed anime, heartwarming slice-of-life stories, or fantasy adventures, Crunchyroll offers the largest anime collection online, featuring a massive library of anime shows and movies available on your favorite device. Watch anime ad-free and in high quality—all in one place. EXCLUSIVE MUSIC VIDEOS AND CONCERTS Get access to thousands of music videos, concert exclusives, and special performances from top artists worldwide. Watch unique behind-the-scenes footage, live performances, and carefully curated playlists that bring anime soundtracks and J-pop sensations to your screen. APP FEATURES ■ Watch anime subbed and dubbed—choose from multiple languages (dub availability varies). ■ Create Crunchylists—make playlists of episodes and favorites. ■ Explore every genre—action, adventure, romance, comedy, supernatural, fantasy, slice of life, and more. ■ Stay up-to-date with simulcast episodes—watch shortly after they air in Japan. ■ Discover Crunchyroll Originals—watch exclusive anime titles created in collaboration with top studios. ■ Enjoy interactive recommendations—get personalized suggestions based on your viewing habits. ■ Save with the annual plan. ■ Ad-free streaming—enjoy your favorite anime without interruptions. ■ Early access to new episodes—watch shortly after they air in Japan. ■ Offline viewing—download episodes to watch anytime. ■ Multiple device streaming—watch on up to six devices simultaneously with Ultimate Fan membership. ■ Crunchyroll Game Vault—play exclusive mobile games with no ads or in-app purchases (Mega Fan and Ultimate Fan members). STREAM THE LARGEST ANIME LIBRARY Over 2,000 titles available, including Crunchyroll exclusives, such as Solo Leveling, Kaiju No. 8, Gachiakuta, Tower of God, and more! ANIME SHOWS ■ One Piece ■ Solo Leveling ■ Attack on Titan ■ My Hero Academia ■ Frieren: Beyond Journey’s End ■ Blue Lock ■ The Apothecary Diaries ■ Dan Da Dan ■ Jujutsu Kaisen ■ Demon Slayer ■ Naruto Shippuden ■ Vinland Saga ■ Dragon Ball: DAIMA ■ And more ANIME MOVIES ■ Suzume ■ Dragon Ball Super: Super Hero ■ Jujutsu Kaisen 0 ■ My Hero Academia: You’re Next ■ Demon Slayer: Mugen Train ■ One Piece Film Red ■ Your Name ■ And many more DOWNLOAD NOW AND START WATCHING THE BEST ANIME SERIES AND MOVIES—ALL IN ONE PLACE IN-APP PURCHASING AND AUTO-PAY INFO ■ Your account will be automatically charged upon confirming membership. ■ Membership auto-renews unless turned off at least 24 hours before renewal. ■ Your account will be charged monthly for renewal within 24 hours before the current period ends. ■ Subscription pricing may vary based on region and selected membership tier. Privacy Policy: https://www.sonypictures.com/corp/privacy.html Terms of Service: https://www.crunchyroll.com/tos
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
React Native
Expo
Axios
React Navigation
React Query
Firebase
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.
