Free
In-App Purchases
Rating summary
About
Reach the hidden word before your opponent — using nothing but how CLOSE your guesses are in meaning. A fresh kind of word-guessing duel.
Type any word and see its HEAT (0–100): how semantically close it is to the hidden target. The nearer the radar's centre, the hotter. Related words link up into a living "constellation of meaning." Follow the heat, read the connections, and close in.
WHAT MAKES IT DIFFERENT
- Win by meaning, not letter count or category
- A heat radar where every guess sits by its closeness to the answer
- Draft 3 self-insight items that change how you read the board
MODES
- vs AI — four strengths (Easy / Normal / Hard / Expert).
- Online — 1-on-1 via Game Center
- Nearby — two devices in the same place
FEATURES
- Deterministic, on-device scoring from 300-dimension meaning vectors. No LLM, no server — instant and consistent
- The answer changes every game, so there's nothing to memorize
- Japanese / English
- Built-in How-to-Play in Settings
PRICING
Free to play. A one-time "Premium" unlock opens all items, the random loadout, Hard & Expert difficulty, and online matches. No subscription.
Note: multiplayer is played between players using the same language setting.
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What's New in Semantra
v2.0
September 12, 2026
・Semantra is now completely free. There are no in-app purchases, and every feature is open to everyone. ・All 10 items are available. Prism, Meteor Search, Black Hole, Chain Lightning, Scene and Reroll were previously paid — now you can draft any of them from the start. ・All four AI strength levels are selectable. Hard and Expert were previously paid, and are now free to play. ・The random loadout button is free for everyone too. ・The purchase screen is gone, and every lock icon with it. A heartfelt thank you to everyone who supported the app by buying it. Enjoy the full game!
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In-App Purchases
$0.49
Premium
Unlock all items, Hard & Expert, and online






