Free, in your browser, no sign-up
Short lessons, an avatar that signs for you and a camera that checks your handshape. All on your phone, nothing to get from an app store.
Your camera image never leaves your device.
From the manual alphabet to your first sentences: 14 units, 57 short lessons and 255 signs.
The VLibras avatar shows every sign. Replay it and slow it down whenever you like.
Make the letter, number or sign and see right away if you got it. If not, the app shows what to change in your hand.
Turn the hand to see each letter from another angle and compare look-alikes, like F and T.
A few signs per lesson, practiced in different ways. With a daily goal and reviews at the right time, five minutes a day go a long way.
Each unit is a path of short lessons, at your own pace.
The avatar shows the sign. Watch it again, slower, as many times as you need.
Watch and choose the meaning, find the right video and match the pairs.
Build sentences with signs and fingerspell words with the manual alphabet.
Show the sign to the camera and see if you got it.
Recognition happens on your device. The video is never recorded or sent.
Measured with people the app never saw in training.
83.5%
of letters recognized correctly
24 letters
still letters of the manual alphabet. H, J, K, X, and Ç are also checked with their movement. Only Z is still practiced freely.
15.3h
of Libras video analyzed
2,113
public videos and Libras dictionary videos (INES, Spread the Sign)
520+
different people and channels signing
1,415k
video frames analyzed
223
different signs in dictionary videos
Training uses only hand and body points, never the images.
The camera already checks 12 whole words with movement, like THANK YOU, FAMILY and MOTHER, and the numbers 0, 2, 3, 8, and 9. Another 52 signs are in training and only join once they pass the same test.
Updated on October 26, 2026.
No app store needed: add the app to your home screen and it opens full screen.
To study without internet, use "Download for offline use" in Settings. After that, lessons, the avatar and the camera work even in airplane mode, and your progress syncs when the connection is back.
It is free from the first lesson to the end of the course, and there is no sign-up. Your progress is stored on your device.
No. You can skip the camera exercises and do the rest of the course without it.
Not yet. It checks the whole manual alphabet except Z, 12 words with movement and the numbers 0, 2, 3, 8, and 9. You practice the rest without the check, and more signs are in training.
No. A quick, optional placement test checks on camera the letters you already know and skips the lessons you have mastered. It earns no points, and you can undo it in Settings.
Yes. Nothing in Librax depends on sound: instructions, results and hints are all on screen, and app sounds are optional.
The interface is in Portuguese, English and Spanish. The language taught is Libras, Brazilian Sign Language.