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
Aqua Box
"
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.1
47 ratings · Top 30%
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Aqua Box: map the core Productivity 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 customizable views (list, grid, calendar)
Assumption to check: Limited task visualization options
Validate with people who use this workflow before building.
Hypothesis 2
Add support for recurring tasks with flexible scheduling
Assumption to check: No recurring tasks feature
Validate with people who use this workflow before building.
Hypothesis 3
Introduce shared projects and team functionalities
Assumption to check: Lack of collaboration features
Validate with people who use this workflow before building.
Hypothesis 4
Enhance tagging with color-coding and search functionalities
Assumption to check: Basic tagging system
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
". . .Great app, covers many bases and will help keeping aquariums healthy! Five stars and great customer service! . . . " - by galaimojcuedu – Feb 20, 2018, US App store Aqua Box is the most complete Freshwater, Brackish water Aquarium and Pond manager on the App Store. Ditch your notepad and paper and manage your aquarium or pond on your iPod Touch, iPhone and iPad. This app features: - Reminders for Common aquarium tasks with notifications on your iPhone and Apple Watch. Also the ability to add to your calendar as well. - Unlimited aquarium/pond tracking. - Track your temp, pH, salinity(brackish water), GH, KH, iron, potassium, and more. - See graphs of all of your parameters within each parameter section. - Record all your equipment costs, place of purchase, date in service, notes, etc. - Record all your livestock and plants. - Visually track your aquarium, livestock growth, effects of supplements, etc with Snapshots! - Timeline to see all of your activities and maintenance of your fresh water, brackish water aquarium or Pond. - Share you data with your family, friends, colleagues! - Supports aquarium search on your home screen. - Track your livestock food. - Schedule your aquarium maintenance in your calendar. - Receive notifications when maintenance is due. - Metric (cm, L), UK units and U.S. units (Inches, gallons) - Automatic iCloud sync with your devices on the same iTunes account. - Automatic sync with your Apple Watch. - Add parameters with your Apple Watch. - Many more features! This is the best and most complete Freshwater and Brackish water aquarium and pond management app for both the beginner and the advanced aquarist. Get Aqua Box Today! This app is updated regularly. Check us out at: www.jcrsoftware.com. Please email us at [email protected] for any feature requests, issues or concerns that you may have.
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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 Navigation
Expo
Zustand
React Native Paper
Axios
Day.js
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.
