About Hot & Cold

What Hot & Cold is

Hot & Cold is a free puzzle about closeness of meaning. There's no letter grid and no spelling tricks: you type a word, and the game tells you how near it is in meaning to a secret word — 🧊 freezing when you're far off, 🔥 blazing when you're within a handful of words, 🎯 when you land on it. Every guess gets a rank against the full word list, so if the secret is wave, ocean might come back warm while tide burns hot, and each answer nudges you closer to the secret. If you like games in this family, we've written a short tour of semantic word games and what makes them tick.

There are three ways to play. Daily gives every player in the world the same secret word, refreshed at 00:00 UTC, with streaks and a global leaderboard. Endless is unlimited practice — a new random secret each round, with optional hints, letter-count reveal, and a countdown timer. Challenge brings in friends asynchronously: pass a link around, and each round everyone in your room hunts the same secret, earning podium-style points that accumulate across rounds in the room standings. The how-to-play guide walks through all three.

How it's built

Every guess is scored against precomputed word embeddings — vectors with 1,024 coordinates apiece, produced by a language model, that capture what a word means. When you guess, the game compares your word's vector to the secret's by cosine similarity and ranks it against every other word on the list. Ranks are precomputed once, so your #37 is everyone's #37 — there's no per-device variance to argue about.

The word list itself is curated: 14,828 words, mostly common singular English nouns. Restricting guesses to that list is what keeps the scoring honest — every valid guess already has a meaningful, precomputed position. Secrets come exclusively from the list's roughly 6,500 most common entries, so the reveal is never a head-scratcher; the rarer tail exists to give your guesses and hints room to roam.

The daily secret is picked on our servers at 00:00 UTC, never on your device. That keeps it identical for everyone worldwide — and it means the answer can't be datamined out of the app, so nobody can peek at tomorrow's word.

Our approach

Hot & Cold is free to play, and no account is required — every mode works anonymously. The mobile app has no forced ads: no interstitials, and nothing in the game gated behind watching a video. There is an optional "support the developer" rewarded video on iOS and Android for players who want to chip in — supporters get a small heart badge, and that's the whole reward. We also keep data collection light; the details are laid out plainly in our privacy policy.

Who makes it

Hot & Cold is made by Lambda 7 Tech LLC, an independent studio. Small team, no publisher — which means feedback lands directly with the people who build the game. Found a bug, have a word-list grievance, or just want to say hi? Email [email protected] or visit the support page.

Where to play

Play free in your browser at hotandcold.app/play, or grab the app: Hot & Cold on the App Store for iPhone and iPad, or Hot & Cold on Google Play for Android. The apps bundle the whole word list, so Endless and bot Challenge work fully offline. New to the game? Start with the daily — and if you find yourself stuck at freezing, the tips page can thaw a cold streak.