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
LoMag Data Scanner & Inventory
This is extended version of LoMag Barcode Scanner to Excel enabling you to save different data to Excel XLS, XLSX, CSV, JSON, XML files:
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.0
2 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.
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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/
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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 LoMag Data Scanner & Inventory: 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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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 advanced scanning algorithms for better performance.
Assumption to check: Limited scanning accuracy and speed
Validate with people who use this workflow before building.
Hypothesis 2
Focus on a modern, clean design to improve usability.
Assumption to check: Poor user interface and experience
Validate with people who use this workflow before building.
Hypothesis 3
Add analytics and reporting features for inventory management.
Assumption to check: Lack of comprehensive reporting features
Validate with people who use this workflow before building.
Hypothesis 4
Enhance app performance through optimization and testing.
Assumption to check: Inconsistent app performance
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
This is extended version of LoMag Barcode Scanner to Excel enabling you to save different data to Excel XLS, XLSX, CSV, JSON, XML files: - 1D & 2D BARCODES like product codes, serial numbers, tickets .. - Free TEXTS like item name, description - NUMBERS : quantity, prices - YES/NO : true / false fields - DATES e.g. expiry date - TIME : production time - LONGITUDE & LATITUDE : manual position or from build-in GPS. - ACTUAL DATE AND TIME : current time stamp. - ORDINAL NUMBER : 1,2,3.. for each record - PICTURES : photos from camera You can specify many fields of each type : many barcodes, names, photos.. and determine the order of fields: First article code, then article name, .. Full version allows you to edit and delete data in files. The barcode reader supports the following code formats: - codes on products: EAN-13, EAN-8, ISBN, UPC-A, UPC-E - industrial codes: Codabar, Code 128, Code 93, Code 39, ITF, RSS - 2D codes: QR Code, Data Matrix You can change your phone into a data collector. Very useful app for inventory-making and other logistic processes at the warehouse. The output file may be quickly sent via e-mail. The most important functions of the application: - Continuous scanning of successive barcodes with quantity 1 - Barcode scanning and input of quantity from keybord - Barcode scanning and input of quantity and price - Scanning of barcode and serial number Support of many data sets, which may be named and browsed. Data sets may be saved in Microsoft Excel format compatible with version 97 and newer. The app allows you to send files via e-mail or save them. There is also a possibility of continuing the scanning in the selected data set. Many configuration options: - blocking duplicate codes - sum up number of the same codes - automatic scanning of subsequent codes - scaling photos in an Excel file - verification of the uniqueness of codes in a file with codes entered in the "unique code" column - dictionaries support allows you to select previously defined values from the list - possibility of using a hardware barcode scanners (keyboard interface, collectors and data terminals) Please note: To perform the scan, your device needs to be equipped with a camera with autofocus function. Privacy: http://www.longint.com/PrivacyPolicy.html Reservations: The barcode scanner used in the app operates on ZXing library. https://github.com/zxing/zxing
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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
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zustand
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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.
