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
Package Tracker － Packy
Track a package from anywhere in the world with the most powerful universal package tracker
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 3.9
105 ratings · Top 50%
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.
First kit free with a verified email
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Combine features and design from your favorite apps.
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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/
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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 Package Tracker － Packy: map the core Business 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
Track a package from anywhere in the world with the most powerful universal package tracker. Whether you need to track my package, track my parcel, or track my order — our all in one package tracking app covers every carrier. Track package by tracking number in seconds. Track All Packages One Place Our multi carrier tracking lets you track all my deliveries in one dashboard. Enter tracking number or use tracking number search to check tracking number and get delivery status updates. Use tracking number lookup to find my package or check delivery status fast. Package Tracking & Delivery Tracking Get package status and shipment status updates with our delivery tracking app. Where is my package or where is my delivery? Our package tracker gives full visibility. Track my delivery, track a parcel, or track my shipment — we handle it all. Never ask where is my order again. Package Delivery Alerts & Delivery Notifications Stay informed with package delivery alerts and package tracking notifications. Delivery notifications keep you updated on every shipment tracking event. Monitor order status and delivery status with real-time push alerts. Supported Carriers Our parcel tracking app and delivery tracker support 1,500+ carriers worldwide: JS Express — JS Express tracker with JS tracking number support. Check JS tracking status, JS tracking lookup, JS tracking site, JS tracking package number, and JS package tracking. Tracking JS parcel has never been easier. SF Express — SF Express tracker, SF Express package tracking, SF Express tracking number, SF Express tracking site, and SF Express tracking status. 4PX Express — 4PX Express tracking number lookup, 4PX Express package tracking, 4PX Express tracking site, and 4PX Express tracker. Yunexpress — track Yun Express shipments with Yunexpress tracker and Yunexpress tracking number. Yunexpress track made simple. Yanwen Logistics — Yanwen Logistics tracking status, Yanwen Logistics tracking number, Yanwen Logistics package tracking. China Post — China Post tracker, China Post tracking number lookup, and China Post tracking site. Chukou1 — Chukou1 tracker with Chukou1 tracking number support. JCEX — JCEX package tracking, JCEX tracker, and JCEX tracking number lookup. Wanb Express — Wanb Express tracker, Wanb Express tracking number, Wanb Express package tracking, Wanb Express tracking site. SDH — SDH tracker, SDH package tracker, SDH tracking number, SDH package tracking, SDH tracking site. Gofo Express — Gofo Express tracker with Gofo Express tracking number. Komon Express — Komon Express tracking number support. Sunyou — Sunyou tracker and Sunyou tracking number lookup. Speedx — Speedx tracking and Speedx parcel tracking. Track Speedx package easily. Speedpak — Speedpak tracking number support. Anserx — Anserx tracking number lookup. CCE Express, Uni Uni Express, YTO Express, JD Worldwide, Lasership, Cainiao, Ontrac, India Post tracker — all supported. Track United Parcel Service package with United Parcel Service tracking info and United Parcel Service package tracking. Postal package tracking for all major postal services. Track My Package by Order Number Lost your tracking number? Track my package by order number and track all orders from your favorite stores. Our parcel tracker and package tracker make my tracking effortless. My package tracking has never been this easy. Download now — the best package tracking app and parcel tracking app to track all packages one place. Your delivery tracking app for every parcel, every carrier, everywhere. Terms & Conditions: https://telegra.ph/Terms--Conditions-07-30-2 Privacy Policy: https://telegra.ph/Privacy-Policy-07-30-53
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
Broaden carrier support and provide real-time updates.
Assumption to check: Limited tracking options for certain carriers
Validate with people who use this workflow before building.
Hypothesis 2
Simplify UI and enhance navigation for a better user experience.
Assumption to check: User interface can be cluttered
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize notification preferences for package updates.
Assumption to check: Notifications are not customizable
Validate with people who use this workflow before building.
Hypothesis 4
Optimize data fetching and improve performance for detailed views.
Assumption to check: Slow loading times for package details
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.
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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.
