Cobaltium

Learn a language the way you actually live.

Learning a new language shouldn't feel like homework. Cobaltium turns everyday moments such as, a chat, a book, a spare five minutes — into real progress toward fluency, at your own pace, on your phone or tablet.

Chat your way into a new language.

Talk in four natural modes: Conversation, Corrective, Immersive, and Reflective. Go immersive and type in your own language, watch it become the language you're learning, word by word. Or let Reflective show you exactly how your words sound to a native speaker.

Supported languages: Arabic, Chinese, Danish, Dutch, English, Finnish, French, German, Hebrew, Hindi, Indonesian, Italian, Japanese, Korean, Persian, Polish, Portuguese, Russian, Spanish, Swedish, Turkish.

Tap any word. Any time.

Every sentence can carry a word-by-word translation. Tap a word and it instantly shows its meaning right where you're reading, no dictionary digging, no losing your flow.

Build your own dictionary.

Every word you save lands in your Lexicon, with grammar, usage, and smart lookups. The words that matter to you, ready whenever you need them.

Review that actually sticks.

Cobaltium's smart review brings words back just before you'd forget them, so what you learn truly stays. Turn your saved words into flashcards and let gentle spaced repetition do the heavy lifting.

Read real books.

Import EPUB books and read with tap-to-translate glosses. Stories, articles, what you like reading, in the language you're learning.

Hear it, don't just read it.

Clear, natural voices read words and sentences aloud, so your ears learn alongside your eyes.

Learn anywhere — even offline.

On-device translation and bundled models mean you can keep going on a plane, a train, or in the middle of nowhere.

Whether you're starting Finnish, brushing up on French, or finally exploring a language you've always been curious about, Cobaltium meets you where you are. With 21 interface languages, dozens of learning languages, and no experience required. Just you, your curiosity, and a little time each day.

Cobaltium shine, the light of understanding.