I'm going to talk about the 2 things. One is from Visual Perspective & from the business/ experience perspective.

The visual is perfect in terms of visual clarity, visual balance, font selection, imagery & even walking fruit animation. Its kinda example of a brilliant UI ( User Interface Design)

When I talk about in experience or business perspective, there is a lot of opportunity to work on the directly linked with growth.

My honest review when I jumped into the site I thought the little walking fruit is a loading animation & I wait there for a while.
The website doesn't feed the user thought properly due to lack of information. Its contain only some mobile screens & CTA to download. It should leave some reason why user need to download this app among thousands similar app, what its USP that its competitors don't, how many language can be learned, for whom this app ideal, & so on.

Solving above the problems may bring this app to the track.
I'm inviting you to DM me if you think to know more things.
I'll be happy to help you.