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
Sandboxx News
Sandboxx News delivers the latest military news, defense analysis, and national security updates in one place, built specifically for the military community.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
13 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/
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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 Sandboxx News: map the core News 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 a recommendation engine based on user interests.
Assumption to check: Users often find it difficult to discover new topics or articles.
Validate with people who use this workflow before building.
Hypothesis 2
Create a clearer and more straightforward subscription management interface.
Assumption to check: In-app purchase processes can be confusing.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize notification preferences by topic.
Assumption to check: Push notifications can be overwhelming.
Validate with people who use this workflow before building.
Hypothesis 4
Ensure downloaded articles are reliably accessible offline.
Assumption to check: Offline reading is inconsistent.
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
Sandboxx News delivers the latest military news, defense analysis, and national security updates in one place, built specifically for the military community. Stay informed with breaking stories, expert reporting, and video briefings covering the U.S. military, global conflicts, emerging weapons systems, and defense policy. Whether you’re active duty, a veteran, part of a military family, or simply interested in national security, Sandboxx News helps you follow the stories that matter most. PERSONALIZED MILITARY NEWS Customize your news feed based on your affiliation and service branch. Follow the Army, Navy, Marine Corps, Air Force, Space Force, or Coast Guard and get updates tailored to your interests. EXPERT ANALYSIS Go deeper than headlines with reporting and commentary from experienced defense journalists and military experts. BREAKING NEWS & GLOBAL SECURITY Track the latest developments in global conflicts, military technology, defense strategy, and geopolitical events. MILITARY VIDEO BRIEFINGS Watch short-form and long-form video coverage explaining complex military topics, operations, and emerging threats. FOLLOW THE TOPICS YOU CARE ABOUT Select the categories and military branches you want to follow so your feed stays focused on what matters most to you. SAVE ARTICLES FOR LATER Bookmark stories to read anytime and quickly return to the articles that interest you most. SEARCH THE DEFENSE NEWS ARCHIVE Quickly find stories on specific military topics, weapons systems, operations, and historical events. BUILT FOR THE MILITARY COMMUNITY Sandboxx News is designed for service members, veterans, military families, and defense enthusiasts who want reliable and relevant military reporting. Download Sandboxx News and stay informed about the forces shaping global security.
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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
Zustand
Axios
Firebase
React Navigation
BUILD KIT DIFFICULTY
Advanced
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.
