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
CodexBar Usage Monitor
CodexBar Usage Monitor keeps your AI usage, limits, balances, and refresh status in one focused iPhone and iPad dashboard.
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
3 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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included16 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 CodexBar Usage Monitor: map the core Developer Tools 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
Allow users to set custom categories and tags for resources.
Assumption to check: Limited user customization options for tracking usage.
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate analytics features that visualize trends over time.
Assumption to check: Lacks detailed analytics and insights on usage trends.
Validate with people who use this workflow before building.
Hypothesis 3
Add options to share usage summaries via email or social media.
Assumption to check: No built-in sharing functionality for usage reports.
Validate with people who use this workflow before building.
Hypothesis 4
Implement a better paywall and subscription model to improve clarity.
Assumption to check: In-app purchases are not clearly communicated.
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
CodexBar Usage Monitor keeps your AI usage, limits, balances, and refresh status in one focused iPhone and iPad dashboard. Built for people who move between multiple AI coding and assistant tools, CodexBar helps you check what is available before starting work. Supported providers: - ChatGPT / Codex - GitHub Copilot - Claude - Cursor - OpenRouter - OpenCode ZEN What you can track: - Usage limits, balance details, reset timing, refresh status, and alerts where each provider makes those metrics available - Multiple accounts and grouped provider configurations, so work, personal, and team accounts can stay organized - Recent history and trend context for configured accounts - Home Screen and Lock Screen widgets with configurable tiles for the providers you care about most Privacy and account model: - CodexBar does not require a CodexBar account - CodexBar does not send your provider credentials or usage data to a HemSoft backend - Credentials are stored locally on your device using Keychain where appropriate - Usage and balance requests are made directly from your device to the providers you configure CodexBar is an independent tool and is not affiliated with, endorsed by, or sponsored by the providers it can display. Provider names are used only to identify the services you choose to connect.
Written user reviews are not shown here. Check current App Store reviews >
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
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Zustand
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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.
