Sololearn is made using which programming language or which framework?

Question

Sololearn is made using which programming language or which framework?

Answer 1

ig the app is written in java am not sure but

Answer 2

probably java (or kotlin) for the android app, swift for iOS app, and javascript/nodejs for website... but that's only a guess: mobile app could had been written with cross-platform software (even if I don't think) and website server side could use many more languages than nodejs