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
Token Monitor: AI Usage
Token Monitor shows what your AI tools actually cost you
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 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 Token Monitor: AI Usage: 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
Implement real-time analytics and visualizations for better insights.
Assumption to check: Limited user feedback on token usage accuracy
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to set personalized alerts and thresholds for usage.
Assumption to check: Lack of customization options for tokens
Validate with people who use this workflow before building.
Hypothesis 3
Include an onboarding experience to guide new users through the features.
Assumption to check: No onboarding or tutorial for new users
Validate with people who use this workflow before building.
Hypothesis 4
Provide in-app chat support or a more accessible help section.
Assumption to check: Limited support and contact options
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
Token Monitor shows what your AI tools actually cost you. Spend, token usage, credits, and rate limits for every provider you pay for, together in one app on your iPhone. If you use Claude Code or Codex, you know the annoying part. You start working, then hit a usage cap with no warning and no clear sense of when it lifts. Token Monitor shows the reset countdown for each quota window before you start, so you always know how much headroom you have left. Use it as a CLI-agent companion before starting a long terminal session: check your quota, see when it resets, and avoid getting capped mid-task. WHAT YOU CAN TRACK - Claude Code and Codex usage, quota windows, and live reset timers - API spend for OpenAI, Anthropic, OpenRouter, Groq, and xAI - Perplexity credits and renewal dates - Token mix on every request: input, cached, output, and reasoning - Spend and request charts for the last week, month, quarter, or year - Breakdowns by model, project, API key, and workspace HOW IT WORKS Paste an API key, or sign in to your Claude and Codex web sessions. Token Monitor reads your usage and shows it back to you. It does not send prompts, route traffic, or touch your model calls. It only reads numbers you already have access to. WHERE YOUR KEYS LIVE Keys and session tokens stay in the iOS Keychain on your device. There is no Token Monitor account, no server, and no cloud. Your usage data never leaves your iPhone. subscription required to add more than one provider* Support: https://optimalapps.ca Privacy Policy: https://optimalapps.ca/privacy Terms of Use: Apple's Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
Expo
Supabase
React Navigation
Zustand
React Native Paper
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.
