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
TrackaLacker: In-stock Tracker
Never miss restocks again! TrackaLacker sends instant notifications when hard-to-find items are back in stock
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.8
2,999 ratings · Top 5%
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 included15 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 TrackaLacker: In-stock Tracker: map the core Shopping 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
Never miss restocks again! TrackaLacker sends instant notifications when hard-to-find items are back in stock. Join 150,000+ shoppers beating the bots daily. NEW: Join the community on TrackaLacker Spaces! Use our new Card Scanner to identify your Pokemon cards, get market value and recent sales, and catalog your personal card collection. NEW: Track resale prices and availability for concert tickets! Looking to score a ticket for an upcoming tour or show? Track the show you want to see, set your target price and get alerted the moment a ticket becomes available in your price range. FREE REAL-TIME RESTOCK ALERTS Get instant push notifications the moment items go from "out of stock" to "now in stock." No more refreshing, no more missing out. HOT IN-STOCK PRODUCTS WE TRACK • Collectibles: POP MART Labubu figures, Pokémon Cards, Magic: The Gathering, Football Cards • Tickets: from sports to festivals to concerts - track the events you want to catch and get alerted when tickets are available in your price range • Gaming: Lenovo Legion Go 2, Nintendo Switch 2, PlayStation 5, Xbox Series X • Tech & Tinkerers: NVIDIA GPUs (RTX 5090/5080/5070), AMD Radeon cards, PC components, Bambu Lab 3D Printers • Cameras: Fujifilm X100VI, Canon PowerShot G7X Mark III, SX740 • Seasonal: Holiday supplies, Halloween decorations, Christmas decorations …and more! BEAT THE BOTS Items selling out in seconds? TrackaLacker’s lightning-fast alerts put you ahead of resellers and bots. Get notified before social media even knows there’s a restock. FEATURES THAT WIN • Instant push notifications for hot restocks. • Track any product — if we don’t have it, request it! • Curated deal feeds by category • Free unlimited alerts • Custom trackers for specific items • 24/7 monitoring JOIN THE COMMUNITY Over 100,000 collectors, gamers, and shoppers use TrackaLacker to score impossible finds. From viral Labubu drops to GPU restocks, we’ve helped our users save millions by buying at retail instead of from scalpers. Never take an L on a drop again. Download TrackaLacker now and get notified when items are now in stock! ABOUT TRACKALACKER SUBSCRIPTIONS TrackaLacker is completely FREE to use for tracking products and receiving alerts. For power users, we offer optional Premium and Ultra subscriptions that provide prioritized notification processing for faster alerts. Subscription Tiers: - Premium (Monthly): $2.99 per month - Ultra (Monthly): $5.99 per month - Premium (Annual): $28.50 per year (Billed annually) - Ultra (Annual): $57.00 per year (Billed annually) Subscription Details: - Billing: Payments are processed securely via our website (Stripe). - Auto-Renewal: Subscriptions automatically renew at the end of each billing period unless canceled before the renewal date. - Free Trial: Ultra Annual plans include a 7-day free trial for new users. At the end of the trial, your subscription will automatically convert to a paid annual subscription unless canceled. - Cancellation: You can manage or cancel your subscription at any time via the “Manage Subscription” section in your account settings. Terms of Use: trackalacker.com/terms-of-service Privacy Policy: trackalacker.com/terms-of-service#privacy-policy
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 more robust alert options with user-defined criteria.
Assumption to check: Limited product availability notifications.
Validate with people who use this workflow before building.
Hypothesis 2
Add direct purchasing capabilities from the app.
Assumption to check: No integration with payment options.
Validate with people who use this workflow before building.
Hypothesis 3
Include functionality to share products on social media.
Assumption to check: Lack of social sharing features.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to compare prices and stock across multiple sites.
Assumption to check: No comparison tools for different retailers.
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
Supabase
Zustand
react-native-reanimated
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.
