[hkt]

What I didn't realise until recently was that Duolingo's web version contains written material on grammar that is completely inaccessible on mobile. It is very very frustrating to know that what must be their main platform receives a slightly inferior service, even for paying customers.

[x0x0]

If it makes you feel any better, the grammar material is superficial. At best.

You'd do far better to download a syllabus from a college class for your desired language, find the text, and buy Edition n-1 on Amazon for like $10.