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League of Legends app for Windows

Before. During. After. Your AI assistant for League of Legends

Buildzcrank reads your game in real time and tells you who to pick, what to buy with the gold you have and what to fix when it ends.

Download for Windows See features
  • AI item recommendations free, with no game limit
  • No Overwolf, never touches the game files

Before · While you pick your champion

It tells you who to pick

While you pick, the AI weighs your role, your team’s picks and theirs, and ranks champions by synergy and counter. When you lock in, runes, spells and build are already in the client.

  • Re-ranks with every pick and ban
  • Runes, spells and build imported for you
  • ARAM tiers with your bench sorted
Draft recommender
Buildzcrank Champion select

Champion recommendations · AI

87.6 Ahri Team87 @15+150g Late86 Mastery71
86.8 Lissandra Team80 @15+430g Late80 Mastery22
84.4 Vex Team72 @15+360g Late80 Mastery18
83.9 Orianna Team99 @15-200g Late91 Mastery35
Runes · option 1
Electrocute Domination Sorcery
51.2%Win rate
✓ Imported to the client

During · Over the game, without leaving it

It tells you what to buy now

Every time your gold or inventory changes, the list recalculates. It marks what you can already afford in green and, if the item is still far off, the component you can buy now.

  • The skill to level, in the same panel
  • Enemy summoner spell timers
  • Lane gold and augment tiers
Item predictor
Buildzcrank In game
Shop · AI 1,240 g
Level up QWER
#1 Zhonya's Hourglass Reason: Zed Needlessly Large Rod · 1,200 g 41.2%
#2 Shadowflame Reason: your current inventory Needlessly Large Rod · 1,200 g 26.5%
#3 Rabadon's Deathcap Reason: general synergy Needlessly Large Rod · 1,200 g 21.8%

Recommended for Ahri

Enemy summoners 14:32
3:32 Ready
Ready Ready
1:27 Ready
Lane gold +1.5k
=
← 920
← 640

After · When the game ends

It tells you what to improve

When the game ends, the coach reviews it phase by phase: what went well, what cost you the game and two or three concrete things for the next one.

  • Compared to your champion and role
  • Champion Fit: the champions that suit you
  • History with all your reports
Post-game coach
Buildzcrank Game over
Defeat · 27:10 Ranked Solo/Duo · Ahri Mid
7/4/9KDA 7.8CS/min 61%KP 18Vision
AI coach · by phase
  1. Early · min 0-14

    Solid wave control: two levels ahead by minute 8.

  2. Mid · min 15-27

    Three deaths holding over 1,400 gold without shopping.

  3. Late

    Join fights after your support engages, not before.

For the next one

Buy vision control before every objective: you reached dragon with no ward.

Buildzcrank Champion select

Champion recommendations · AI

87.6 Ahri Team87 @15+150g Late86 Mastery71
86.8 Lissandra Team80 @15+430g Late80 Mastery22
84.4 Vex Team72 @15+360g Late80 Mastery18
83.9 Orianna Team99 @15-200g Late91 Mastery35
Runes · option 1
Electrocute Domination Sorcery
51.2%Win rate
✓ Imported to the client
Shop · AI 1,240 g
Level up QWER
#1 Zhonya's Hourglass Reason: Zed Needlessly Large Rod · 1,200 g 41.2%
#2 Shadowflame Reason: your current inventory Needlessly Large Rod · 1,200 g 26.5%
#3 Rabadon's Deathcap Reason: general synergy Needlessly Large Rod · 1,200 g 21.8%

Recommended for Ahri

Enemy summoners 14:32
3:32 Ready
Ready Ready
1:27 Ready
Lane gold +1.5k
=
← 920
← 640
Defeat · 27:10 Ranked Solo/Duo · Ahri Mid
7/4/9KDA 7.8CS/min 61%KP 18Vision
AI coach · by phase
  1. Early · min 0-14

    Solid wave control: two levels ahead by minute 8.

  2. Mid · min 15-27

    Three deaths holding over 1,400 gold without shopping.

  3. Late

    Join fights after your support engages, not before.

For the next one

Buy vision control before every objective: you reached dragon with no ward.

Demo game · assets © Riot Games

Try it here

Play with the AI, nothing to install

Three demos on a sample game: Ahri mid. Change the opponent, the gold or the phase and watch the app respond.

Enemy mid
Your jungler

Champion recommendations · AI

  1. Ahri Counters Zed 87.6
  2. Lissandra Counters Zed 86.8
  3. Vex Counters Zed 84.4
  4. Orianna Synergy with Vi 83.9
  5. Malzahar Counters Zed 83.3
Breakdown · PRO Team87 @15+150g Late86 Mastery71

Example with illustrative scores. In the app they come from the model with the real draft.

Against
Your inventory Luden's EchoSorcerer's ShoesControl Ward
Shop · AI 1,240 g
Level up · Level 9 QWER
#1 Zhonya's Hourglass Reason: Zed Buy ahead: Needlessly Large Rod · 1,200 g 41.2%
#2 Shadowflame Reason: your current inventory Buy ahead: Needlessly Large Rod · 1,200 g 26.5%
#3 Rabadon's Deathcap Reason: general synergy Buy ahead: Needlessly Large Rod · 1,200 g 21.8%

Recommended for Ahri

Example probabilities. Gold only decides what you can afford; the model sets the order from the game state.

Defeat · 27:10 Ranked Solo/Duo · Ahri Mid · 7/4/9
AI coach · by phase
  1. Early · min 0-14

    Solid wave control: two levels ahead by minute 8.

  2. Mid · min 15-27

    Three deaths holding over 1,400 gold without shopping.

  3. Late

    Join fights after your support engages, not before.

  4. For the next one

    Buy vision control before every objective: you reached dragon with no ward.

Sample report. The real one is generated from your game when you press "Analyse game".

Features

Ten tools, one for every moment

Sorted by the moment of the game they act in. Each one has its own page with every detail.

Before While you pick your champion
During Over the game, without leaving it
After When the game ends
Between games Outside the game

See all features

Free & PRO

The essentials are free. Always.

Downloading and using Buildzcrank costs nothing. PRO adds the deeper analysis and comes from Premium days.

Free

Forever, no game limit

  • AI item predictor
  • Draft recommender
  • Automatic rune, spell and build import
  • Overlays: enemy spells, lane gold and augment tiers
  • Daily challenges
  • ARAM tiers
  • Playground: mastery, style, challenges and teammates

PRO

With Premium days

  • Breakdown and mastery in draft
  • The reason by name on every buy
  • Phase advisor
  • Post-game coach
  • Champion Fit

How to get PRO

  1. Invite friends Every friend who links their LoL account adds Premium days for you. Your code is in the app, under Referrals.
  2. Join the Discord We hand out codes in campaigns and events, and you hear about new features first.
Go to Discord

Trust

A separate app, not a hack

Never touches the game
It doesn't modify files, inject code, read League's memory or press keys for you.
Reads what Riot offers
It uses the data League exposes to third-party apps and shows windows on top.
No Overwolf
A standalone Windows desktop app, lightweight and with automatic updates.
Independent
Buildzcrank is not an official Riot Games product and is not endorsed by Riot.

Built by two League players who wanted a tool that genuinely helps. Meet the team

Get started

Open it and play

  1. Download the installer A single .exe for Windows 10 and 11.
  2. Sign in With Google or Discord. Link your LoL account if you want the coach.
  3. Open League Buildzcrank switches on when it detects the client. Use borderless window for the overlays.
Full install guide

FAQ

Before you install

Is it free?

Yes. Downloading and using Buildzcrank is free, and AI item recommendations always will be, with no game limit. Some analysis features are PRO and unlock with Premium days.

How do I get PRO?

With Premium days. You earn them by inviting friends from the Referrals section in the app and with codes we hand out on Discord.

Do I need an account?

Yes, a Buildzcrank account with Google or Discord. For the post-game coach, Champion Fit and Playground you also link your League account.

Does it modify or inject code into League?

No. Buildzcrank is a separate app: it doesn't modify game files, inject code, read League's memory, or press keys or play for you.

Does it work without Overwolf?

Yes. Buildzcrank doesn't use Overwolf: it's a standalone Windows desktop app.

The overlays don't show up?

In League, set Windowed or Borderless in the video options. Exclusive fullscreen covers every other window.

Is there a Mac or Linux version?

Windows 10 and 11 only for now.

Do the recommendations guarantee a win?

No. They help you decide better and faster; you still play the game.

Is it an official Riot product?

No. Buildzcrank is independent and not affiliated with or endorsed by Riot Games.

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Try it in your next game

Free for Windows. Before, during and after, in one app.

Download for Windows

Free · Windows 10 and 11 · No Overwolf