Volt: AI Cost & Usage Tracker

Volt is a companion for developers who use Claude, Claude Code, and OpenAI. Pair it with Volt for Mac by scanning a QR code, and your usage comes to your iPhone, no account, no sign-up. Volt is an independent developer tool. It is not affiliated with, endorsed by, or sponsored by Anthropic or OpenAI. It works with your own accounts and your own API keys. WHAT YOU CAN DO • Live session tracking — see your Claude 5-hour and weekly usage with a live countdown, so a rate limit never surprises you. • Organization analytics — if you use admin API keys, view spend, model breakdown, workspaces, and API-key activity for your Claude and OpenAI organizations. • Key vault — see the API keys you manage in Volt for Mac, with on-device health checks. Keys are never entered on your iPhone. • Insights — on-device usage and spend forecasts. • Notifications — optional alerts when you approach a session limit or when it resets. PRIVATE BY DESIGN • No account required. Pairing uses a one-time QR code from your Mac. • Your API keys never touch our servers. They stay on your devices and sync only through Apple's iCloud Keychain. • Organization analytics are fetched directly between your device and the provider (Anthropic / OpenAI) using your own key. • We mirror only usage figures (percentages and spend) from your Mac, never your keys or prompts. REQUIREMENTS • Volt for Mac, where you add and manage your API keys and sign in to your plan. • Your own Claude / OpenAI accounts and keys. Want to look around first? On the connect screen, tap "Preview with sample data" to explore every screen with example data — no Mac required. URLs: Support: https://lexylon.com/volt · Privacy: https://lexylon.com/volt-privacy · Marketing: https://lexylon.com/volt