Free Forever · No Account Needed

Keep time on
every summoner spell.

Chronokeeper is a lightweight Windows overlay that sits on top of League and tracks enemy summoner spell cooldowns in real time — with voice commands, rune detection, and global keyboard shortcuts.

Windows 10 / 11 · Free installer · No login required

Everything you need. Nothing you don't.

Live Cooldown Timers

Click once when you see a summoner spell used. Chronokeeper counts it down with a visual progress bar and alerts you the moment it's back up.

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Accurate Spell Timers

Automatically detects which summoner spells each enemy has equipped — Flash, Teleport, Ignite, Exhaust and more — with the correct cooldown for each.

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Global Keyboard Shortcuts

Mark spells without alt-tabbing. Numpad 1–5 for D spells, Numpad 6–0 for F spells. Works while League is focused.

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Voice Commands

Say "Zed flash" or "Leona ult" and the timer starts automatically — fully offline, powered by on-device Whisper AI. No mic data ever leaves your PC.

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Enemy Rune Detection

See each enemy's keystone and secondary rune tree at a glance, colour-coded to match League's own rune palette. Know what you're playing against.

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Always on Top

Transparent, frameless overlay that stays above League in full-screen windowed mode. Drag it wherever fits your setup best.

Up and running in 60 seconds

  1. 1
    Download & install — run the Chronokeeper Setup installer.
  2. 2
    Launch a game — Chronokeeper detects your match automatically via the League Live Client API.
  3. 3
    Click or press a numpad key — mark a summoner spell as used and watch the timer count down in real time.
  4. 4
    Get notified — a sound and system alert fires the moment the cooldown expires so you never miss the window to engage.

Is it safe to use?

Yes. Chronokeeper only reads data from the official League Live Client API that Riot exposes on your local machine. It never reads game memory, injects code, or communicates with any external server during a match. This is the same API used by approved overlay tools.

Voice processing runs entirely on your device — no audio is ever uploaded or transmitted anywhere.

Chronokeeper is a fan-made tool and is not affiliated with, endorsed by, or associated with Riot Games. League of Legends is a trademark of Riot Games, Inc.

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Riot Live
Client API only