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How it works

How our League of Legends stats and app work

Every number on this site comes with the games behind it. In your game, the app looks at who you are up against and tells you what to buy next.

Sample
The Build overlay over the game, on the matchup build: Giant's Belt to buy now, 900 gold and affordable, on the way to Warmog's Armor, then Mercury's Treads, Heartsteel, Spirit Visage and Thornmail.The Gold Read overlay: 15,050 gold in items against each enemy, from 16,800 down to 11,250, with the difference to you.

What you get

  • Before who to pick and who to ban
  • During the next item to buy
  • After all ten players graded
In the app
  • Live item recommendations
  • Solve
  • Pick recommendations
  • Ban recommendations
  • Lane matchups
  • Skill order
  • Gold difference
  • 1v1 matchups
  • Who to focus
  • Jungle route
  • Post-game grades
  • Share links for your team
  • and more
On the site
  • Tier list
  • Builds
  • Build paths
  • Runes
  • Counters
  • Synergies
  • Matchups
  • Skill orders
  • Patch notes
  • Player profiles
  • One-tricks
  • Top players
  • Wasted hours
  • ARAM
  • and more

Where we are different

How our numbers are made

  • We keep the whole game.

    We store all ten players of every game and every item they bought, with the minute. That lets us judge a buy at the moment it was made.

  • We compare like with like.

    A plain item win rate mostly shows who was already winning. We compare players who bought the item with players in the same spot who did not, at the same point in the game.

  • A new patch builds on the last one.

    Our numbers come from our own crawl. Early in a patch the models still lean on the previous patch, and every six hours they retrain with more games from the new one.

  • The site and the app agree.

    The app and this site ask the same server, so they show the same numbers.

In your game

Hold Tab. Your next item is there.

The Build panel has two sources. Matchup is made for this game, against their team. Sleeper is a rare build that wins more than the usual one. Click the word on the panel or press Ctrl+Shift+B to switch.

How Matchup picks the item

  1. Reads the enemy team

    Physical or magic damage, healing, shields, crowd control, and who is ahead.

  2. Finds games like yours

    Your champion and role, at this point in the game, against a similar team.

  3. Ranks what won for them

    Every item you can buy, by how much better those players did after buying it.

  4. Walks you to the shop

    The item, its parts in order, the gold still missing. When the enemy team changes, so does the recommendation.

In champion select

Your best pick before you lock in

The app reads the draft as it happens and scores every champion you could lock, using both teams, both ban lists, your lane and your history.

Your team

In the score

54 signals go into one score

  • base strength
  • role fit
  • lane matchups
  • counters
  • synergy
  • damage balance
  • frontline
  • blue or red side
  • blind pick risk
  • what they might pick
  • bans spent
  • who is still to pick
  • the patch
  • and more

Their team

Bans

A draft, as the app sees it. Ten seats, six bans, three still to lock.

Teammates without the app get a link in chat with the same picks and bans.

Sample
The Solve panel drawn over the game, first of its three options: Liandry's Torment, 3,000 gold to finish, 345 more health against their damage; Fated Ashes is the part to buy now for 900 gold, and the last row offers the upgrade to Solstice Sleigh.

Solve

Solve does not care what people buy

Solve ignores win rates and popular builds. It works from your stats and the five enemies' items, armour and magic resist, and updates as they buy.

Off by default. One switch in Settings. Hold Tab and click the arrows to see its top 3. Short on gold? It shows the part to buy now.

Get it free

No account needed. It only reads the League client's own API while you play. It does not read game memory or inject anything.

Windows 10 and 11 Free, Premium is optional

ko.lol desktop

Your next item, live in your game.

Read from the enemy team's items, stats and champions. Your best pick in champion select, too.

Download free Free. For Windows.
Sample
The Build overlay over the game, on the matchup build: Giant's Belt to buy now, 900 gold and affordable, on the way to Warmog's Armor, then Mercury's Treads, Heartsteel, Spirit Visage and Thornmail.
Get ko.lol for desktop Free. For Windows.