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
Packr Travel Packing List
Packr is a travel packing list app that helps you pack your suitcase for every trip — so you never forget a thing
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
7,151 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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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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 Packr Travel Packing List: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Packr is a travel packing list app that helps you pack your suitcase for every trip — so you never forget a thing. Save time before you go: your packing list is built automatically from your destination (city, country or region), travel dates and activities. ◆ PACKING CHECKLIST ◆ Packr creates a smart packing checklist for your suitcase from dozens of pre-defined activities. Based on length of stay, weather and planned activities, your packing list is ready in no time. It's the perfect tool for summer vacations, long weekends, road trips, business travel and even camping. ◆ LESS STRESS ◆ Every journey is different, and each traveler has their own habits. Packr learns from each of your trips to organize the packing checklist, adjusting items based on your previous trips. You will never forget to pack THAT thing again! ◆ BETTER PREPARED ◆ Set a quantity for each item — some quantities adjust automatically to the length of your stay. Create your own custom packing lists, and now use emojis as list icons to personalize them. Assign each item to a bag or suitcase, and filter your packing list by traveler. Even your pets can have their own packing list. ◆ PLAN MULTI-DESTINATION TRIPS ◆ Import your trips directly from TripIt, including multi-destination itineraries, or convert any trip into a multi-destination journey. ◆ PRACTICAL FEATURES ◆ Sign in with your Apple account to securely save and sync your trips and packing lists across iPhone and iPad. Pack anywhere with improved offline mode — even without a connection. You can also share your checklist with travel companions or print it out. Packr has already travelled several thousand times around planet Earth, packing over a million items in each traveller's suitcase. Packr has been used for trips to cities like Paris, London, Barcelona, New York City, Montreal, Berlin, Majorca... And countries like France, United Kingdom, Spain, Greece, USA, Italy, Canada, Germany and 1000+ more locations. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Written user reviews are not shown here. Check current App Store reviews >
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 feature to categorize items and allow bulk actions.
Assumption to check: Users find it difficult to manage large packing lists
Validate with people who use this workflow before building.
Hypothesis 2
Add a sharing feature via social media or email.
Assumption to check: Limited ability to share packing lists with others
Validate with people who use this workflow before building.
Hypothesis 3
Clarify the benefits of each in-app purchase option through UI prompts.
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Enable offline access to packing lists for users traveling without data.
Assumption to check: The app lacks offline functionality
Validate with people who use this workflow before building.
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
Redux
react-native-paper
@react-navigation/native
TypeScript
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.
