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
Ultra Worldwide
Staying connected to your favorite music festival has never been easier
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 3.0
73 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.
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 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.
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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 Ultra Worldwide: 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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Continue in Rork >
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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
Include more diverse events and genres.
Assumption to check: Limited content variety compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Improve navigation structure and speed.
Assumption to check: Clunky navigation experience
Validate with people who use this workflow before building.
Hypothesis 3
Implement adaptive bitrate streaming for better user experience.
Assumption to check: Inconsistent streaming quality
Validate with people who use this workflow before building.
Hypothesis 4
Use user data to suggest events based on preferences.
Assumption to check: Lack of personalized recommendations
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
Staying connected to your favorite music festival has never been easier. Ultra Worldwide gives you the ability to create your own personal Ultra experience-- select your favorite events, customize your schedule, earn Ultra Passport points and much more! Ultra Worldwide is the global brand of the world’s premier electronic music event, Ultra Music Festival. Ultra Worldwide is not only the world’s biggest and most successful remaining independent electronic music festival brand, but also the most international festival brand in the world. Take a further glance at Ultra Worldwide’s features below -- Curate your Ultra Experience Select and follow up to over 35 Ultra Worldwide events. Enable up-to-the-minute notifications on things you care about including ticket sales, lineup releases, special announcements and much more! Favorite artists and customize your schedule. Purchase tickets to all Ultra Worldwide events in a simpler, more streamlined fashion. Be Part of the Action Relive past events by watching stunning, video content. Listen to essential playlists via Apple Music. Glimpse through breathtaking photos and become familiar with the many Ultra Worldwide events from across the globe. Navigate your way throughout the event grounds with an interactive site map. Stay Updated 24/7 The news feed provides the latest information on all things Ultra Worldwide. Prepare for the event by exploring insightful and informative frequently asked questions. Earn Points and Benefits with Ultra Passport Earn Ultra Passport points for attending Ultra Worldwide events around the globe. Build your Ultra Passport status and enjoy exciting benefits. Learn more about how to earn points and the different benefits per status level.
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
Supabase
@react-navigation/native
@supabase/supabase-js
zustand
BUILD KIT DIFFICULTY
Intermediate
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.
