LoL Summoner Spell Timer — Flash Cooldown Tracker
Tap an enemy's Flash, Teleport or Ignite when they use it. You get the time remaining and the game time it comes back. Summoner spell haste from Cosmic Insight, Ionian Boots of Lucidity and Crimson Lucidity is applied automatically. No install, no login: keep it on a second monitor or your phone.
How to use
- Press Start when the game starts. Opened it late? Tap the clock (00:00) and type the in-game time (
12:34or1234) to start from there. - Use the ⇄ button on each spell to pick what the enemy is running.
- Turn on Insight and the boots button when they have Cosmic Insight or Lucidity boots. The boots button cycles none → Lucidity (+10) → Crimson (+20).
- Tap a spell when the enemy uses it. CD shows the time remaining and ETA the game time it's back. It pulses for the last 10 seconds and plays a chime (and vibrates on phones) when it's up.
- A running game survives page reloads.
Summoner spell cooldown table (with Cosmic Insight and Lucidity)
| Spell | Base | Lucidity +10 | Insight +18 | Crimson +20 | Insight+Lucidity +28 | Insight+Crimson +38 |
|---|---|---|---|---|---|---|
| Flash | 5:00300s | 4:33273s | 4:14254s | 4:10250s | 3:54234s | 3:37217s |
| Teleport | 5:00300s | 4:33273s | 4:14254s | 4:10250s | 3:54234s | 3:37217s |
| Ignite | 3:00180s | 2:44164s | 2:33153s | 2:30150s | 2:21141s | 2:10130s |
| Barrier | 3:00180s | 2:44164s | 2:33153s | 2:30150s | 2:21141s | 2:10130s |
| Exhaust | 4:00240s | 3:38218s | 3:23203s | 3:20200s | 3:08188s | 2:54174s |
| Ghost | 4:00240s | 3:38218s | 3:23203s | 3:20200s | 3:08188s | 2:54174s |
| Heal | 4:00240s | 3:38218s | 3:23203s | 3:20200s | 3:08188s | 2:54174s |
| Cleanse | 4:00240s | 3:38218s | 3:23203s | 3:20200s | 3:08188s | 2:54174s |
Cooldown = base × 100 ÷ (100 + summoner spell haste), rounded to the second. After 10:00 Teleport becomes Unleashed Teleport with a 330–240s cooldown based on level. Smite uses charges, so it isn't tracked. Values as of the November 2026 patch (Data Dragon 16.22).
FAQ
- What is Flash's cooldown in League of Legends?
- 300 seconds (5 minutes). 254s with Cosmic Insight, 234s with Cosmic Insight and Ionian Boots of Lucidity, 217s with Cosmic Insight and Crimson Lucidity.
- How much does Cosmic Insight reduce summoner spell cooldowns?
- It grants 18 summoner spell haste, about a 15% reduction. Flash goes from 300s to 254s.
- How much summoner spell haste do Lucidity boots give?
- Ionian Boots of Lucidity give 10 summoner spell haste. The Crimson Lucidity upgrade gives 20.
- Does it touch the game client?
- No. It's a browser timer that never reads or changes game data. You tap it yourself, like writing timers on a notepad.
- Does it work on phones?
- Yes. On small screens each role gets one row. Use "Add to Home Screen" in your browser to open it like an app.