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.
Book hostels worldwide and meet fellow travellers with the world’s leading travel app for backpackers and solo travellers
Free · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Hostelworld: Hostel Travel App: map the core Travel workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Book hostels worldwide and meet fellow travellers with the world’s leading travel app for backpackers and solo travellers. Find cheap hostels, join city chats, discover local events, and travel solo without feeling alone. Because travelling solo shouldn’t mean staying solo! Hostelworld is the world's leading hostel finder, trusted by backpackers and solo travellers for over 25 years. Search and book from 21,000+ hostels in 187 countries, compare prices, read verified reviews, and find the best cheap hostels for every budget and travel style. “Hostels are the best way to travel and Hostelworld is the best way to find them.” – Elite Daily Meet travellers before you arrive Go from solo to social in seconds! This is where the trip really starts. Create your Traveller Profile Add your name, photo, age, pronouns, languages, interests, travel stats and more Share where you’ve been, what you love, and let people find you before you even arrive See who’s going where next. Share your Travel Plans and discover others heading your way Join plan-based chat groups and connect before you arrive Chat your way into new connections City Chats – join destination-based groups linked to your booking Hostel Chats – connect with people staying at the same hostel Direct messages – keep conversations going one-to-one Get your Social Pass Social Pass unlocks full access to city chats, meetups, and traveller connections in any destination, even without a hostel booking. Attend Events in every city From pub crawls to walking tours – join curated experiences designed to bring travellers together offline. Because the best travel moments don’t happen on a screen. They happen when a “maybe” turns into a night out with people you met an hour ago. Or when a walking tour ends in dinner, then somehow turns into plans for the next city. Events aren’t just activities, they’re how strangers become travel companions. Discover free and paid local activities Say yes to spontaneous plans, shared adventures, and nights you didn’t see coming Find your perfect hostel, anywhere From party hostels to chilled hideouts – we’ve got you covered. Search 21,000+ hostels across 187 countries From European city breaks to Southeast Asian escapes Private rooms, shared dorms, mixed or female-only options Smart filters for price, location, facilities and vibe - find the best affordable hostels for your trip Real photos and real reviews from real travellers Making travel more accessible, affordable and social Trusted by travellers for over 25 years We’ve been helping backpackers and solo travellers meet the world for two decades. 13M+ verified reviews from real guests Ratings based on value, location, atmosphere and more A global community built on honest travel experiences Experiences built for connection Travel is what happens between the plans. Walking tours, pub crawls, yoga sessions and more Free activities designed to bring travellers together Built for every kind of traveller Whether it’s your first trip or your fiftieth: Gap year explorers Solo travellers chasing connection Budget backpackers stretching every euro Groups making memories across continents No matter how you travel, connection changes everything. Sometimes it’s a quick chat in a hostel kitchen. Sometimes it’s a group plan that turns into a week-long detour. That’s what this is built for – not just places to stay, but people to share them with. If you’re chasing freedom, people, and stories worth telling, you’re in the right place. Go anywhere, stay everywhere Hostels in cities, on beaches, in jungles, or wherever the road takes you. Instant booking across 21,000 hostels in 187 countries Exclusive deals and cheap hostel rates for backpackers and solo travellers 24/7 access to the world’s biggest hostel network Free cancellation on most bookings (plans change – we get it!) Discover trending destinations and hidden gems worldwide Travel light. Meet more people. Stay anywhere.
Written user reviews are not shown here. Check current App Store reviews >
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
Assumption to check: Limited hostel options in certain locations
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: High service fees on bookings
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: User interface can feel cluttered
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited customer support options
Validate with people who use this workflow before building.
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.