Whole question: Are there any major differences between Renshuu pro and the free one in learning material available, main progress in Japanese, those learning aspects?
i know Renshuu shouldn't be the only ultimate source of japanese content to learn from (putting aside that is a really good app to teach, and it being free mostly) but are there any things that make the free version worse?
They're all up on Support renshuu > renshuu pro in the menu.
I wouldn't call anything I do "making the free version worse", but given that the renshuu pro tools do have value, it's fair to say that renshuu pro is better than free renshuu.
For learning material - no. You can study ALL the vocab, kanji, grammar, and sentences regardless of which version you use. I do not have any kind of material caps where you, for example, cannot "learn past level 7 unless you pay".
With regards to the pro tools that affect your quizzing system, it's easier to think of it in this way: renshuu pro enhances the ways in which you can study the materials, but does not open up new materials.
