TKN: AI API Cost Firewall

AI spend tracker & key vault

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

See todays AI API spend across OpenAI, Anthropic, Grok and Gemini in one place. Keep your keys on-device behind Face ID, set spend rules, and stay ahead of a runaway bill TKN is a financial firewall for AI API spending — a developer's spend dashboard and key vault for OpenAI, Anthropic, xAI (Grok), and Google Gemini, in one OLED-black terminal on your phone. THE PROBLEM A leaked key or a runaway loop can quietly burn hundreds of dollars before your monthly invoice ever arrives. TKN puts your AI spend somewhere you'll actually see it. ONE DASHBOARD, EVERY PROVIDER Connect your provider billing keys and see today's spend across all of them at a glance, with a per-provider breakdown — no more logging into four separate billing consoles. • OpenAI & Anthropic — organization/admin key • xAI (Grok) — management key • Google Gemini — Google Cloud Billing Spend figures come straight from each provider's official billing API, which reports on a daily cadence. YOUR KEYS NEVER LEAVE YOUR DEVICE API keys are stored in the iOS Keychain — encrypted, never in plain text, and locked behind Face ID. TKN does not upload your provider keys to any server. A KILL SWITCH WHEN YOU NEED IT Something looks wrong? The kill switch is a deliberate, swipe-to-confirm control — designed so you can never trigger it by accident. SPEND RULES Define what "normal" spend looks like and keep an eye on it from the Console. START WITHOUT AN ACCOUNT The whole app runs in a demo mode with no sign-up. Create an optional account — Sign in with Apple, Google, or GitHub — only when you want to sync your setup across devices. You can delete your account and its data from inside the app at any time. TKN PRO Free covers the dashboard for a single provider. Pro unlocks unlimited providers, spend rules, and the kill switch — as a monthly or annual subscription, or a one-time lifetime unlock. Subscriptions auto-renew unless cancelled; manage them anytime in your Apple ID settings. Built by developers, for developers. TKN Pro is available as an auto-renewing subscription (monthly or annual) or a one-time Lifetime purchase. Payment is charged to your Apple ID at confirmation. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period; manage or cancel anytime in your Apple ID settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://gettkn.app/privacy.html

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

The developer, The Hopium Lab, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Purchases
    • Contact Info
    • Identifiers

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
The Hopium Lab Ltd
Size
48.1 MB
Category
Developer Tools
Compatibility
Requires iOS 15.1 or later.
  • iPhone
    Requires iOS 15.1 or later.
  • iPod touch
    Requires iOS 15.1 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
  • tkn_pro_lifetime $99.99
  • tkn_pro_monthly $9.99
  • tkn_pro_annual $79.99
  • Learn More
Copyright
© The Hopium Lab 2026
  • Developer Website
  • Privacy Policy

    • More by The Hopium Lab