What is LoLTheory?

Updated

LoLTheory is a League of Legends theorycrafting tool that gives you live champion and item recommendations while you play. It's built for players who want data-backed build and pick suggestions instead of relying on memory or static guides. The site reports over 5M champions picked, 90K+ downloads, and 10M+ games analyzed, and it offers a downloadable app plus a legacy site.

What LoLTheory does

The core idea is adaptive recommendations: suggestions change as the match unfolds rather than staying fixed from champion select.

  • Overlay Recommendations — a build overlay that dynamically adapts recommendations based on the enemy's build, your current items, runes, and summoner spells.
  • Team-Based Champ Recommendations — calculates win rates and scores for any champion and role, tailored to your team's synergy and the opposition.
  • Team-Based Build Recommendations — builds a loadout from ally and enemy champions using analysis of runes, items, skills, and summoner spells. You can customize by selecting your favorite first item and keystone.
  • Smart Insights — ban recommendations, risk analysis, flex pick forecasting, and an Enemy Role Assignment Breakdown.

Who it's for

LoLTheory fits players who want in-game guidance that reacts to what's actually happening in the match, and who still want room to make their own choices. One user review on the site notes it "gave me great options I did not even think about myself and it is good that you still leave room for personal preferences." Another describes the appeal as "seeing the builds update in real time."

If you prefer to theorycraft entirely on your own or don't want an overlay running during games, the tool's value is lower for you.

How to get started

  1. Go to loltheory.gg.
  2. Download the app (the site also links to a Legacy Site).
  3. Use the overlay during matches to see recommendations that adapt to the game state.
  4. Explore the Team Comp Analyzer, Counters, Synergies, Statistics, Champion List, and Patch Comparison sections for pre-game planning.

The site does not state pricing on the page, so check the download flow for any cost or account requirements before committing.

What to keep in mind

LoLTheory isn't endorsed by Riot Games and doesn't reflect the views of Riot Games or anyone involved in producing or managing League of Legends. League of Legends and Riot Games are trademarks of Riot Games, Inc.

Treat its recommendations as inputs to your own decisions, not as fixed instructions — the tool is designed to leave room for personal preference, and its suggestions are only as good as the data behind them.